冲压发动机进气道/燃烧室/尾喷管耦合流场计算

Inlet/combustor/nozzle coupled flow field calculation for ramjet

关键词:  进气道  燃烧室  冲压喷气发动机  一体化流场+  数值仿真

Key words:  Inlet  Combustor  Ramjet engine  Coupled flowfield  Numerical simulation

摘要:

采用耦合求解的方法进行了冲压发动机进气道/燃烧室/尾喷管流场一体化计算,进气道采用单一气体、变比热比模型,燃烧室和尾喷管采用多组分化学动力学模型,湍流模型为k-g湍流模型。进气道与燃烧室界面通过流量、静压等参数实现耦合。结果表明,通过合理设计参数的传递方式,可以快速实现进气道/燃烧室/尾喷管流场的耦合求解,流场分布合理。

Abstract:

An efficient multi-code CFD solver was designed to simulate the integrated flowfields in a ramjet engine in a loosely coupled manner.The multiblock,multigrid,single-species,turbulence flow solver was used to simulate the flows in the inlet,while a multi-species one to simulate the flows in the combustor and nozzle.The k-g turbulence model was used in the calculations.By means of carefully designed message feedback of mass flow rate,static pressure,etc.,on the inlet-combustor interface,the flowfield of inlet and combustor can be solved efficiently.The turbulent flowfields obtained are reasonable.