Transported PDF Modeling of Thermo-Acoustic Instability in a Self-Excited Model Rocket Combustor using Eulerian Monte Carlo Fields Method

摘要

Combustion driven thermo-acoustic instability is a critical issue in the development of high-speed propulsion devices like gas turbines, rocket engines, ramjets and scramjets which needs to be investigated thoroughly to increase the life-cycle of these devices. In this work we conduct numerical studies of longitudinal instability in a self-excited model rocket combustor to demonstrate the capability of the state-of-the-art transported probability density (PDF) function method. The PDF transport equation is solved numerically using the Eulerian Monte Carlo Fields (EMCF) method. The simulations are validated with experimental pressure data for two operating conditions. Para metric studies of the EMCF method are conducted to understand the sensitivity of thermo-acoustic instability to the EMCF method parameters.