Section: Application Domains
We consider three generic configurations, which are typical for numerical simulations related to propulsion devices.
Supersonic under-expanded free jets are typically present in the case of the accidental boring of a combustion chamber. The capability of accurately simulating their main properties is of great interest in the framework of the engine certification procedure. These generic configurations are particularly useful to test in due course the complete range of numerical tools developed in the project since it can be dealt with by solving the Euler equations, the Navier-Stokes equations as well as Reynolds Average Navier-Stokes (RANS) or large-eddy simulations (LES) based equations.
Subsonic jets in cross-flow are encountered in many cooling systems for combustion chamber walls of jet or helicopter engines. They are also found in micro-combustors for which the mixing between fuel and oxidizer is a crucial issue since it has to be extremely rapid due the short residence time of the flow in the combustor. The experimental bank MAVERIC has been developed by Pascal Bruel at LMAP. It is used to study inert flows related to cooling of combustion chamber walls and is well-suited for the comparison between numerical simulations and experiments of turbulent flows in future work.
A combustion zone fed by two channel flows of propane+air, stabilized by a sudden expansion, is representative of lean premixed pre-vaporized (LPP) combustors. This configuration has been chosen for the development of numerical methods and software able to cope with the simulation of low Mach number reacting flows with large density variations and which present some similarity with those present in a real combustion chamber.