Physics of Non-ideal Fluids
Start Date:August 24, 2020
Practical propulsion systems operate at high pressures, e.g., the chamber pressure of the RD 170 family developed by the Soviet Union in 1970s, one of the most powerful liquid-fueled rockets, is around 245 bar. As a result of the high pressure, the injected fuel may be at transcritical or supercritical state during the mixing, evaporation and combustion processes. Modeling these processes has serious challenges due to the non-equilibrium and unsteady nature of the phenomena, lack of a physical interface, and departure from the ideal gas behavior. This course will introduce thermodynamics of non-ideal gases, including intermolecular potential, empirical real equation of state and mixing rules, vapor-liquid equilibrium, and sub-to-supercritical transition criteria. The course will also discuss recent progresses in understanding and modeling high-pressure chemical reacting flows, including supercritical droplets, jets and flames, as well as combustion chemistry at high pressures.