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针对涡流燃烧室的试验模型,耦合计算了其中的燃烧、流动和传热过程。湍流模型采用RNG k-ε两方程模型,辐射传热采用P1辐射模型,化学反应采用有限速率模型。数值模拟了涡流燃烧室在20s内的传热过程,得到了燃烧室和喷管的壁面温度分布随时间的变化。燃烧室侧壁面和头部温度在4秒内就达到较稳定状态,在涡流保护下侧壁面最高温度在650K左右,头部最高温度在785K左右。对于热沉喷管,壁面温度随时间基本呈缓慢线性上升,在一定的时间内可以满足实验要求。
Aiming at the test model of eddy current combustor, the combustion, flow and heat transfer process are calculated. The RNG k-ε two-equation model is used for the turbulence model, the P1 radiation model for the radiative heat transfer, and the finite-rate model for the chemical reaction. Numerical simulation of the vortex chamber in the 20s heat transfer process, the combustion chamber and the nozzle wall temperature distribution over time. The temperature of the side wall and the head of the combustion chamber reached a relatively stable state in 4 seconds. Under the eddy current protection, the maximum temperature of the side wall surface was about 650K and the maximum temperature of the head was about 785K. For the heat sink nozzles, the wall temperature rises slowly and linearly with time, which can meet the experimental requirements in a certain period of time.