Publications

**Archival Publications**

- Gooding, W. J., Fabian, J. C., and Key, N. L., 2020, “LDV Characterization of Unsteady Vaned Diffuser Flow in a Centrifugal Compressor."
*ASME J. Turbomach.*, April 2020,**142**(4), pp. 041001 (8 pages). doi: 10.1115/1.4046230 - Meier, M., Gooding, W., Fabian, J. C., and Key, N.L., 2020, "Considerations for Using Additive Manufacturing Technology in Centrifugal Compressor Research."
*J. Eng. Gas Turbines Power*, March, 2020,**142**(3), pp. 031018 (8 pages). doi: 10.1115/1.4044937 - Gooding, W. J. and Key, N. L., 2019, “Leveraging LDV Techniques for the Investigation of Unsteady Turbomachinery Flows.”
*The Aeronautical Journal*, Volume 123, Issue 270. June, 2019. doi: 10.1017/aer.2019.28 - Lou. F, Fabian, J. C., and Key, N.L., 2019, "Design Considerations for Tip Clearance Sensitivity of Centrifugal Compressors in Aeroengines."
*Journal of Propulsion and Power*, February, 2019. doi: 10.2514/1.B37100 - Methel, J., Smith, N.R., Berdanier, R.A., and Key, N.L., 2018, “Effects of Circumferential Nonuniformity in Compressor Flow Fields Including Vane Wake Variability,” Accepted to the AIAA
*Journal of Propulsion and Power*, February, 2018. - Lou, F., Fabian, J.C., and Key, N.L., 2018, “Interpreting Aerodynamics of a Transonic Impeller from Static Pressure Measurements,” Accepted to the Special Issue on Advances in Fluid Dynamics of Turbomachinery in the
*International Journal of Rotating Machinery*, February, 2018. - Lou, F., Fabian, J.C., and Key, N.L., 2018, "A New Approach for Centrifugal Impeller Preliminary Design and Aerothermal Analysis,”
*Journal of Turbomachinery*,**140**(5), pp. 051001 (10 pages). doi: 10.1115/1.4038876 - Berdanier, R.A. and Key, N.L., 2017 “Demonstrating the Utility of Pressure Measurements to Calculate Blockage in a Multistage Compressor with an Application for Large Tip Clearances,” Accepted to the AIAA
*Journal of Propulsion and Power*, October, 2017. - Li, J., Aye-Addo, N., Kielb, R.E., and Key, N.L., 2017, "Mistuned Higher Order Mode Forced Response of an Embedded Compressor Rotor: Part 2 – Mistuned Forced Response Prediction,”
*Journal of Turbomachinery*,**140**(3), pp. 031006 (11 pages). doi: 10.1115/1.4038519 - Smith, N.R. and Key, N.L., 2017, “A Comprehensive Investigation of Blade Row Interaction Effects on Stator Loss Utilizing Vane Clocking,” Accepted to the ASME
*Journal of Turbomachinery*, August, 2017. - Lou, F., Fabian, J.C., and Key, N.L., 2017, “Stall Inception in a High-Speed Centrifugal Compressor During Speed Transients,”
*Journal of Turbomachinery*,**139**(12), pp. 121004 (10 pages). doi: 10.1115/1.4037759 - Berdanier, R.A., Smith, N.R., Young, A.M., and Key, N.L., “Effects of Tip Clearance on Stall Inception in a Multistage Compressor,”
*Journal of Propulsion and Power*,**34**(2), pp. 308-317. doi: 10.2514/1.B36364 - Smith, N.R. and Key, N.L., 2017, “Blade Row Interaction Effects on Unsteady Stator Loading in an Embedded Compressor Stage,”
*Journal of Propulsion and Power*,**33**(1), pp. 248-255. doi: 10.2514/1.B35981 - Smith, N.R. and Key, N.L., 2016, "Vane Clocking Effects on Stator Suction Side Boundary Layers in a Multistage Compressor,"
*International Journal of Rotating Machinery*,**2016**, Article ID 5921463, 14 pages. doi: 10.1155/2016/5921463 - Berdanier, R.A., Bhattacharya, S., Vlachos, P.P., and Key, N.L., 2016, "A New Particle Image Velocimetry Technique for Turbomachinery Applications,"
*Journal of Turbomachinery*,**138**(12), 124501 (4 pages). doi: 10.1115/1.4033672 - Berdanier, R.A. and Key, N.L., 2016, "Experimental Characterization of Tip Leakage Flow Trajectories in a Multistage Compressor,"
*Journal of Propulsion and Power*,**32**(4), pp.1022-1032. doi: 10.2514/1.B35929. - Lou, F., Fabian, J.C., and Key, N.L., 2016, “An Experimental Investigation of Flow Distortion in an APU-Style Inlet System,”
*Journal of Propulsion and Power*,**32**(4), pp.892-902. doi: 10.2514/1.B35948. - Besem, F.M., Kielb, R.E., Galpin, P., Zori, L., and Key, N.L., 2016, “Mistuned Forced Response Predictions of an Embedded Rotor in a Multistage Compressor,”
*Journal of Turbomachinery*,**138**(6), 061003 (10 pages). doi: 10.1115/1.4032164 - Besem, F.M., Kielb, R.E., and Key, N.L., 2016, “Forced Response Sensitivity of a Mistuned Rotor from an Embedded Compressor Stage,”
*Journal of Turbomachinery*,**138**(3), 031002 (10 pages). doi: 10.1115/1.4031866 - Berdanier, R.A. and Key, N.L., 2016, "A Novel Data Reduction Technique for Single Slanted Hot-Wire Measurements Used to Study Incompressible Compressor Tip Leakage Flows,"
*Experiments in Fluids*,**57**(3), 29 (14 pages). doi: 10.1007/s00348-016-2114-z. - Monk, D.J., Key N.L., Fulayter, R.D., 2016, "Reduction of Aerodynamic Forcing Through Introduction of Stator Asymmetry in Axial Compressors,"
*Journal of Propulsion and Power*,**32**(1), pp.131-141. doi: 10.2514/1.B35704. - Smith, N.R., Murray III, W.L., Key, N.L., 2016, "Considerations for Measuring Compressor Aerodynamic Excitations Including Rotor Wakes and Tip Leakage Flows,"
*Journal of Turbomachinery*,**138**(3), 031008 (9 pages). doi: 10.1115/1.4032006. - Berdanier, R.A., Key, N.L., 2016, "The Effects of Tip Leakage Flow on the Performance of Multistage Compressors Used in Small Core Engine Applications,"
*Journal of Engineering for Gas Turbines and Power*,**138**(5), 052605 (10 pages). doi: 10.1115/1.4031625. - Murray III, W.L., Key, N.L., 2015, "Experimental Investigation of a Forced Response Condition in a Multistage Compressor,"
*Journal of Propulsion and Power*,**31**(5), pp.1320-1329. doi: 10.2514/1.B35525. - Smith, N.R., Berdanier, R.A., Fabian, J.C., Key, N.L., 2015, "Reconciling Compressor Performance Differences for Varying Ambient Inlet Conditions,"
*Journal of Engineering for Gas Turbines and Power*,**137**(12), 122603 (9 pages). doi: 10.1115/1.4030518. - Smith, N.R., Key, N.L., 2015, "Flow visualization for investigating stator losses in a multistage axial compressor,"
*Experiments in Fluids*,**56**(5), 94 (17 pages). doi: 10.1007/s00348-015-1964-0. - Berdanier, R.A., Key, N.L., 2015, "Experimental Investigation of Factors Influencing Operating Rotor Tip Clearance in Multistage Compressors,"
*International Journal of Rotating Machinery*,**2015**, Article ID 146272, 13 pages. doi: 10.1155/2015/146272. - Murray III, W.L., Key, N.L., 2015, "Detection of Rotor Forced Response Vibrations Using Stationary Pressure Transducers in a Multistage Axial compressor,"
*International Journal of Rotating Machinery*,**2015**, Article ID 198534, 10 pages. doi: 10.1155/2015/198534. - Smith, N.R., Key, N.L., 2015, "Vane Clocking Effects on Stator Loss for Different Compressor Loading Conditions,"
*Journal of Propulsion and Power*,**31**(2), pp.519-526. doi: doi/10.2514/1.B35193. - Berdanier, R.A., Smith, N.R., Fabian, J.C., Key, N.L., 2015, "Humidity Effects on Experimental Compressor Performance—Corrected Conditions for Real Gases",
*Journal of Turbomachinery*,**137**(3), 031011 (10 pages). doi: 10.1115/1.4028356. - Key, N.L., 2014, "Influence of Upstream and Downstream Compressor Stators on Rotor Exit Flow Field,"
*International Journal of Rotating Machinery*,**2014**, Article ID 392352, 10 pages. doi: 10.1155/2014/392352. - Brossman, J.R., Ball, P.R., Smith, N.R., Methel, J.C., Key, N.L., 2014, "Sensitivity of Multistage Compressor Performance to Inlet Boundary Conditions,"
*Journal of Propulsion and Power*,**30**(2), pp.407-415. doi: 10.2514/1.B34742. - Smith, N.R., Key, N.L., 2014, "Unsteady Vane Boundary Layer Response to Rotor-Rotor Interactions in a Multistage Compressor,"
*Journal of Propulsion and Power*,**30**(2), pp.416-425. doi: 10.2514/1.B34765. - Lou, F., Fabian, J., Key, N.L., 2014, "The Effect of Gas Models on Compressor Efficiency Including Uncertainty,"
*Journal of Engineering for Gas Turbines and Power*,**136**(1), 012601 (8 pages). doi: 10.1115/1.4025317. - Key, N.L., 2014, "Compressor Vane Clocking Effects on Embedded Rotor Performance,"
*Journal of Propulsion and Power*,**30**(1), pp.246-248. doi: 10.2514/1.B34604. - Smith, N.R., Key, N.L., 2013, "Vane Clocking Effects on Stall Margin in a Multistage Compressor,"
*Journal of Propulsion and Power*,**29**(4), pp.891-898. doi: 10.2514/1.B34636. - Lou, F., Fleming, R., Key, N.L., 2012, "Calculating High Speed Centrifugal Compressor Performance from Averaged Measurements,"
*International Journal of Turbo and Jet Engines*,**29**(4), pp.289-298. doi: 10.1515/tjj-2012-0029. - Miller, K.L., Key, N.L., Fulayter, R.D., 2012, "Lessons Learned from an Aggressive Outlet Guide Vane Design for Axial Compressors,"
*Journal of Propulsion and Power*,**28**(5), pp.918-926. doi: 10.2514/1.B34470. - Brossman, J.R., Smith, N.R., Talalayev, A., Key, N.L., 2011, "Tailoring Inlet Flow to Enable High Accuracy Compressor Performance Measurements,"
*International Journal of Turbo and Jet Engines*,**28**(4), pp.309-320. doi: 10.1515/tjj.2011.065. - Salontay, J.D., Key, N.L., Fulayter, R.D., 2011, "Investigation of Flow Physics of Vane Clocking Effects on Rotor Resonant Response,"
*Journal of Propulsion and Power*,**27**(5), pp.1001-1007. doi: 10.2514/1.B34081. - Choi, Y.S., Key, N.L., Fleeter, S., 2011, "Vane Clocking Effects on the Resonant Response of an Embedded Rotor,"
*Journal of Propulsion and Power*,**27**(1), pp.71-77. doi: 10.2514/1.48485. - Key, N.L., Lawless, P.B., Fleeter, S., 2010, "Rotor Wake Variability in a Multistage Compressor,"
*Journal of Propulsion and Power*,**26**(2), pp. 344-352. doi: 10.2514/1.45715. - Key, N.L., Lawless, P.B., Fleeter, S., 2010, "An Experimental Study of Vane Clocking Effects on Embedded Compressor Stage Performance,"
*Journal of Turbomachinery*,**132**(1), 011018 (10 pgs). doi: 10.1115/1.3072714. - Key, N.L., Lawless, P.B., Fleeter, S., 2009, "Vane Clocking in a Three-Stage Compressor: Frequency Domain Data Analysis,"
*Journal of Propulsion and Power*,**25**(5), pp.1100-1107. doi: 10.2514/1.43423. - Key, N.L. and Arts, T., 2006, "Comparison of Turbine Tip Leakage Flow for Flat Tip and Squealer Tip Geometries at High-Speed Conditions,"
*Journal of Turbomachinery*,**128**(2), pp.213-220. doi: 10.1115/1.2162183. - Key, N.L., Lawless, P.B., Fleeter, S., 2004, "Rotor Generated Vane Row Off-Design Unsteady Aerodynamics Including Dynamic Stall: Part I,"
*Journal of Propulsion and Power*,**20**(5), pp.835-841. doi: doi/10.2514/1.3878.

**Technical Papers**

- Harrison, H. M., and Key, N.L., 2020, “A New Approach to Modeling Slip and Work Input for Centrifugal Compressors,” Under review for ASME Turbo Expo 2020, GT2020-14135.
- Gooding, W. J., Meier, M. A., and Key, N. L., 2020, “The Impact of Various Modelling Decisions on Flow Field Predictions in a Centrifugal Compressor,” Under review for ASME Turbo Expo 2020, GT2020-14516.
- Gooding, W. J., Meier, M. A., Gunter, E. J., and Key, N. L., 2020, “Nonlinear Response and Stability of an Experimental Overhung Compressor Mounted with a Squeeze Film Damper,” Under review for ASME Turbo Expo 2020, GT2020-15212.
- Harrison, H. M., Lou, F., and Key, N.L., 2019, “Investigation of Slip Models for High-Speed Centrifugal Compressors” In AIAA In AIAA Propulsion & Energy 2019 Forum, doi: 10.2514/6.2019-3818
- Kormanik III, N.J., Matthews, D.M., Key, N.L., and King, A.J., 2019, "Purdue 3-Stage Axial Compressor Research Facility: Through the Years, to Infinity, and Beyond" In AIAA Propulsion & Energy 2019 Forum, doi: 10.2514/6.2019-4000
- Lou, F., & Key, N. L., 2019, "The Design Space for the Final-Stage Centrifugal Compressor in Aero Engines." In AIAA Scitech 2019 Forum (p. 0944), doi: 10.2514/6.2019-0944
- Berdanier, R.A. and Key, N.L., "Evaluating Effects of Rotor Tip Clearance on Downstream Stator, Performance in a Multistage Axial Compressor." Presented at the 23rd International Society of Air Breathing Engines Conference, Manchester, U.K., Sept 3-8, Paper No. ISABE 2017-21409.
- Gooding, W. J., Fabian, J. C., and Key, N. L. "Numerical Analysis of Unsteady Vaned Diffuser Flow in a Centrifugal Compressor," Presented at the 23rd International Society of Air Breathing Engines Conference, Manchester, U.K., Sept 3-8, Paper No. ISABE 2017-21417.
- Lou, F., Fabian, J.C., and Key, N.L., 2017, “Stall Inception in a High-Speed Centrifugal Compressor During Speed Transients,” In the Proceedings of ASME Turbo Expo 2017: Gas Turbine Technical Conference and Exposition, Charlotte, NC, June 26-30, ASME Paper GT2017-64499. Accepted to the
*Journal of Turbomachinery.* - Smith, N.R. and Key, N.L., 2017, “A Comprehensive Investigation of Blade Row Interaction Effects on Stator Loss Utilizing Vane Clocking,” In the Proceedings of ASME Turbo Expo 2017: Gas Turbine Technical Conference and Exposition, Charlotte, NC, June 26-30, ASME Paper GT2017-63831. Accepted to the
*Journal of Turbomachinery.* - Li, J., Aye-Addo, N., Kormanik III, N., Matthews, D., Key, N.L., and Kielb, R.E., 2017, “Mistuned Higher-Order Mode Forced Response of an Embedded Compressor Rotor: Part 1 – Steady and Unsteady Aerodynamics” In the Proceedings of ASME Turbo Expo 2017: Gas Turbine Technical Conference and Exposition, Charlotte, NC, June 26-30, ASME Paper GT2017-64633. doi:10.1115/GT2017-64633
- Li, J., Aye-Addo, N., Kielb, R.E., and Key, N.L., 2017, “Mistuned Higher Order Mode Forced Response of an Embedded Compressor Rotor: Part 2 – Mistuned Forced Response Prediction,” In the Proceedings of ASME Turbo Expo 2017: Gas Turbine Technical Conference and Exposition, Charlotte, NC, June 26-30, ASME Paper GT2017-64647. doi:10.1115/GT2017-64647
- Methel, J., Gooding, W. J., Fabian, J. C., Key, N. L., Whitlock, M., 2016, "The Development of a Low Specific Speed Centrifugal Compressor Research Facility," Presented at ASME Turbo Expo, Seoul, South Korea, June 13-17, GT2016-56683. doi:10.1115/GT2016-56683
- Lou, F., Harrison, H. M., Fabian, J. C., Key, N. L., 2016, "Development of a Centrifugal Compressor Facility for Performance and Aeromechanics Research," Presented at ASME Turbo Expo, Seoul, South Korea, June 13-17, GT2016-56188. doi:10.1115/GT2016-56188
- Sreenivas, K., Webster, R.S., Hereth, E.A., Berdanier, R.A., and Key, N.L., 2016, "Computational Simulations of a Multi-Stage Subsonic Research Compressor," Presented at the 54th AIAA Aerospace Sciences Meeting, San Diego, CA, Jan. 4-8, AIAA-2016-0395. doi: 10.2514/6.2016-0395.
- Berdanier, R.A., Key, N.L., 2016, "Quantifying Blockage in a Multistage Compressor for Different Tip Clearances using Steady and Unsteady Pressure Measurements," Presented at the 54th AIAA Aerospace Sciences Meeting, San Diego, CA, Jan. 4-8, AIAA-2016-0651. doi: 10.2514/6.2016-0651.
- Berdanier, R.A., Key, N.L., 2015, "Characterization of Tip Leakage Flow Trajectories in a Multistage Compressor Using Time-Resolved Over-Rotor Static Pressures," Presented at the 22nd International Symposium on Air Breathing Engines, Phoenix, AZ, Oct. 25-30, ISABE-2015-20006. http://hdl.handle.net/2374.UC/745637.
- Smith, N.R., Key, N.L., 2015, "Effects of Blade Row Interactions on Unsteady Stator Surface Pressures in an Embedded Compressor Stage," Presented at the 22nd International Symposium on Air Breathing Engines, Phoenix, AZ, Oct. 25-30, ISABE-2015-20104. http://hdl.handle.net/2374.UC/745707.
- Lou, F., Fabian, J. C., and Key, N. L., “An Experimental Investigation of Flow Distortion in an APU-Style Inlet System,” Presented at 51st AIAA/SAE/ASEE Joint Propulsion Conference, Orlando, FL, July 27-29, AIAA-2015-3701. doi: 10.2514/6.2015-3701.
- Smith, N.R., Berdanier, R.A., Fabian, J.C., and Key, N.L., 2015, "Reconciling Compressor Performance Differences with Varying Ambient Conditions," Presented at ASME Power and Energy, San Diego, CA, June 28-July 2, POWER2015-49102. doi: 10.1115/POWER2015-49102.
- Berdanier, R.A., Key, N.L., 2015, "Data Processing Techniques for Measurements Collected from a Single Slanted Hot-Wire for Turbomachinery Applications," Presented at the 45th AIAA Fluid Dynamics Conference, Dallas, TX, June 22-26, AIAA-2015-2928. doi: 10.2514/6.2015-2928.
- Lou, F., Murray III, W.L., Key, N.L., 2015, "Development of a Research Facility to Study the Flow Field in an APU-Style Inlet," Presented at the 31st AIAA Aerodynamic Measurement Technology and Ground Testing Conference, Dallas, TX, June 22-26, AIAA-2015-2860. doi: 10.2514/6.2015-2860.
- Smith, N.R., Murray III, W.L., Key, N.L., 2015, "Considerations for Measuring Compressor Aerodynamic Excitations Including Rotor Wakes and Tip Leakage Flows", Presented at ASME Turbo Expo, Montréal, Canada, June 15-19, GT2015-43508. doi: 10.1115/GT2015-43508.
- Besem, F.M., Kielb, R.E., and Key, N.L., 2015, "Forced Response Sensitivity of a Mistuned Rotor from an Embedded Compressor Stage," Presented at ASME Turbo Expo, Montréal, Canada, June 15-19, GT2015-43032. doi: 10.1115/GT2015-43032.
- Methel, J.C., Smith, N.R., Key, N.L., 2015, "Vane Wake Characterization for a Multistage Compressor Including Variability", Presented at the 53rd AIAA Aerospace Sciences Meeting, Kissimmee, FL, Jan. 5-9, AIAA-2015-1341. doi: 10.2514/6.2015-1341.
- Monk, D.J., Murray III, W.L., Key, N.L, 2015, "Experimental and Computational Study of Forced Response in a Multistage Axial Compressor", Presented at the 53rd AIAA Aerospace Sciences Meeting, Kissimmee, FL, Jan. 5-9, AIAA-2015-1342. doi: 10.2514/6.2015-1342.
- Monk, D.J., Key N.L., Fulayter, R.D., 2015, "Reduction of Rotor Forced Response Using Stator Asymmetry in a Multistage Compressor", Presented at the 53rd AIAA Aerospace Sciences Meeting, Kissimmee, FL, Jan. 5-9, AIAA-2015-1343. doi: 10.2514/6.2015-1343.
- Murray III, W.L., Key, N.L., 2014, "Experimental Investigation of a Forced Response Condition in a Multistage Compressor," Presented at the AIAA Propulsion and Energy Forum, Cleveland, OH, July 28-30, AIAA-2014-3735. doi: 10.2514/6.2014-3735
- Berdanier, R.A., Smith, N.R., Fabian, J.C., Key, N.L., 2014, "Humidity Effects on Experimental Compressor Performance—Corrected Conditions for Real Gases", Presented at ASME Turbo Expo, Düsseldorf, Germany, June 16-20, GT2014-25790. doi: 10.1115/GT2014-25790.
- Lou, F., Fabian, J., Key, N.L., 2013, "The Effect of Gas Models on Compressor Efficiency Including Uncertainty," Presented at ASME IMECE, San Diego, CA, Nov. 15-21, IMECE2013-62611. doi: 10.1115/IMECE2013-62611.
- Smith, N.R., Key, N.L., 2013, "Vane Clocking Effects on Stator Loss for Different Compressor Loading Conditions," Presented at the 21st International Symposium on Air Breathing Engines, Busan, Korea, Sept. 9-13, ISABE-2013-1134.
- Smith, N.R., Key, N.L., 2013, "Unsteady Vane Boundary Layer Response to Rotor-Rotor Interactions in an Embedded Compressor Stage," Presented at the 51st AIAA Aerospace Sciences Meeting, Grapevine, TX, Jan. 7-10, AIAA-2013-0421. doi: 10.2514/6.2013-421.
- Smith, N.R., Key, N.L., 2012, "Vane Clocking Effects on Stall Margin in a Multistage Compressor," Presented at the 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Atlanta, GA, July 29-Aug. 1.
- Brossman, J.R., Ball, P.R., Smith, N.R., Methel, J.C., Key, N.L., 2012, "The Sensitivity of Multistage Compressor Performance to Inlet Boundary Conditions," Presented at the 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Atlanta, GA, July 29-Aug. 1.
- Brossman, J.R., Smith, N.R., Talalayev, A., Key, N.L., 2011, "The Development of a Multistage Axial Compressor Research Facility," Presented at the 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, San Diego, CA, July 31-Aug. 2.
- Fleming, R., Lou, F., Key, N.L., 2011, "The Development of a High Speed Centrifugal Compressor Research Facility," Presented at the 49th AIAA Aerospace Sciences Meeting, Orlando, FL, Jan. 4-7.
- Salontay, J.D., Key, N.L., Fulayter, R.D., 2010, "A Computational Investigation of Vane Clocking Effects on Embedded Compressor Stage Efficiency," Presented at the 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Nashville, TN, Jul. 26-28.
- Salontay, J.D., Key, N.L., Fulayter, R.D., 2010, "A Computational Investigation of Vane Clocking Effects on Compressor Forced Response," Presented at the 48th AIAA Aerospace Sciences Meeting, Orlando, FL, Jan. 4-7.
- Miller, K.L., Key, N.L., Fulayter, R.D., 2009, "Tip Clearance Effects on the Final Stage of an HPC," Presented at the 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Denver, CO, Aug. 2-5.
- Choi, Y.S., Key, N.L., Fleeter, S., 2008, "Vane Clocking Effects on the Resonant Response of an Embedded Rotor," Presented at the 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Hartford, CT, July 20-23.
- Key, N.L., Lawless, P.B., Fleeter, S., 2008 "An Experimental Study of Vane Clocking Effects on Embedded Compressor Stage Performance," Presented at the ASME Turbo Expo, Berlin, Germany, ASME Paper GT2008-51087.
- Key, N.L., Lawless, P.B., Fleeter, S., 2008, "An Investigation of the Flow Physics of Vane Clocking Using Unsteady Flow Measurements," Presented at the ASME Turbo Expo, Berlin, Germany, ASME Paper GT2008-51091.
- Key, N.L., Lawless, P.B., Fleeter, S., 2007, "Vane Clocking in a Three-Stage Compressor – Frequency Domain Data Analysis," Presented at the 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Cincinnati, OH, July 8-11.
- Heister, S., Fleeter, S., Son, S., Anderson, W., Hrbud, I., Merkle, C., Key, N., Qiao, L., 2007, "Propulsion Educational and Research Programs at Purdue University," Presented at the 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conferences, Cincinnati, OH, July 11-14.
- Key, N.L., Lawless, P.B., Fleeter, S., 2007, "Rotor Wake Variability in a Multistage Compressor," Presented at the 45th AIAA Aerospace Sciences Meeting & Exhibit, Reno, NV, Jan. 8-11, AIAA Paper 2007-19.
- Arts, T., Ginibre, P., Oksuz, O., Iliopoulou, V., Key, N.L.,2005, "Comparison of Turbine Tip Leakage Aero Thermal Flows for Flat Tip and Squealer Tip Geometries at High-Speed Conditions: Experimental and Numerical Investigation," Presented at the 6th European Turbomachinery Conference, Lille, France, March 7-11.
- Key, N.L., Arts, T., 2004, "Comparison of Turbine Tip Leakage Flow for Flat Tip and Squealer Tip Geometries at High-Speed Conditions," Presented at the ASME Turbo Expo, Vienna, Austria, June 14-17.
- Key, N.L., Lawless, P.B., Fleeter, S., 2004, "Rotor Wake Variability in a Transonic Compressor Stage," Presented at the ASME Turbo Expo, Vienna, Austria, June 14-17, GT2004-53486.
- Key, N.L., Lawless, P.B., Fleeter, S., 2002, "Rotor Generated Vane Row Off-Design Unsteady Aerodynamics Including Dynamic Stall: Part I," Presented at the 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Indianapolis, IN, July 7-10.
- Key, N.L., 2002, "PIV Study of Negative Incidence Stator Unsteady Aerodynamics," Presented at the 40th Annual AIAA Aerospace Sciences Meeting, AIAA Paper 2002-0014. (AIAA National Graduate Student Paper Competition Winner)

**Theses**

- Kamdar, N., 2018, "Computational Investigation of Cavity Leakage Flow and Windage Heating within an Axial Compressor Stator Well," MS Thesis, School of Mechanical Engineering, Purdue University.
- Adkins-Rieck, R., 2018, "Additive Manufacturing for Aerodynamic Diffuser Designs in a Centrifugal Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Matthews, D.R., 2017, "Unsteady Aerodynamics and Blade-row Interactions in the Embedded Stage of an Axial Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Rusu, R., 2017, "Experimental Investigation of Inlet Distortion in a Multistage Axial Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Wallace, J.N., 2017, "Aerodynamic Design of a Four-Stage Low-Speed Axial Compressor for Cantilevered Stator Research," MS Thesis, School of Mechanical Engineering, Purdue University.
- Davis, C.A., 2017, "Mechanical Design Considerations for a Low-Speed Axial Compressor Research Facility," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Kormanik III, N.J., 2017, "Characterization of Aerodynamic Forcing Functions for Embedded Rotor Resonant Response in a Multistage Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Aye-addo, P.A.N., 2016, "An Experimental Study of the Effects of Vane Count and Non-Uniform Vane Spacing on Rotor Resonant Response," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Methel, J.C., 2016, "An Experimental Comparison of Diffuser Designs in a Centrifugal Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Lou, F., 2016, "A Study on Flow Development in an APU-Style Inlet and its Effect on Centrifugal Compressor Performance," PhD Dissertation, School of Mechanical Engineering, Purdue University.
- Berdanier, R.A., 2015, "An Experimental Characterization of Tip Leakage Flows and Corresponding Effects on Multistage Compressor Performance," PhD Disseration, School of Mechanical Engineering, Purdue University.
- Dolan, M.P., 2015, "Establishing Repeatable Operation of a Centrifugal Compressor Research Facility for Aerodynamic Investigations," MS Thesis, School of Mechanical Engineering, Purdue University.
- Smith, N.R., 2015, "An Experimental Study on the Effects of Blade Row Interactions on Aerodynamic Loss Mechanisms in a Multistage Compressor," PhD Dissertation, School of Aeronautics and Astronautics, Purdue University.
- Monk, D.J.W., 2014, "A Computational Analysis of the Aerodynamic and Aeromechanical Behavior of the Purdue Multistage Compressor," MS Thesis, School of Mechanical Engineering, Purdue University.
- Heckaman, B.A., 2014, "Design of Optical Access for the Application of Laser Doppler Velocimetry in a Low Specific Speed Centrifugal Compressor," MS Thesis, School of Mechanical Engineering, Purdue University.
- Murray III, W.L., 2014, "Experimental Investigation of a Forced Response Condition in a Multistage Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Ball, P.R., 2013, "An Experimental and Computational Investigation on the Effects of Stator Leakage Flow on Compressor Performance," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Morrison, E.S.S., 2013, "Development of a Three Dimensional Compressible Flow Calibration Facility for Thermal Anemometry," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Brossman, J.R., 2012, "An Investigation of Rotor Tip Leakage Flows in the Rear-Block of a Multistage Compressor," PhD Dissertation, School of Mechanical Engineering, Purdue University.
- Berdanier, R.A., 2012, "Design of a Multi-Stage Research Compressor for Cantilevered Stator Hub Clearance Flow Investigations," MS Thesis, School of Mechanical Engineering, Purdue University.
- Miller, K.R., 2012, "Design of a Centrifugal Compressor Research Facility for Low Specific Speed Applications," MS Thesis, School of Mechanical Engineering, Purdue University.
- Smith, N.R., 2011, "Experimental Investigation of Vane Clocking Effects on Stall Performance and Unsteady Van Boundary Layer Development in a Multistage Compressor," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Talalayev, A., 2011, "On the Renovation of the Three-Stage Axial Compressor Research Facility for Compressor Performance Research," MS Thesis, School of Mechanical Engineering, Purdue University.
- Fleming, R.M., 2010, "The Design and Performance of a Centrifugal Compressor Research Facility," MS Thesis, School of Mechanical Engineering, Purdue University.
- Salontay, J.R., 2010, "A Computational Investigation of Vane Clocking Effects on Compressor Forced Response and Performance," MS Thesis, School of Mechanical Engineering, Purdue University.
- Miller, K.L., 2009, "An Experimental Investigation of a Final HPC Stage Including Pre-Diffuser Performance," MS Thesis, School of Mechanical Engineering, Purdue University.
- Ishak, N.H.Md., 2009, "Effects of Inlet Total Pressure Distortion on Fan Performance," MS Thesis, School of Aeronautics and Astronautics, Purdue University.
- Key, N.L., 2007, "Vane Clocking Effects in an Embedded Compressor Stage," PhD thesis, School of Mechanical Engineering, Purdue University.