气动谐振加热效应的数值模拟

为研究谐振管内部的流动情况,建立了喷嘴-圆柱形谐振管系统的模型,利用二阶NND格式求解二维轴对称雷诺平均N-S方程,通过耦合求解传热方程在边界条件中考虑谐振管的传热,模拟气动谐振加热效应,得到了谐振管底部气体的压力与温度振荡曲线,计算结果与实验结果较为一致.结果表明,在约20 ms内即可完成对谐振管底部气体的谐振加热,且谐振管的传热是影响气动谐振加热温度的重要因素,在数值模拟中对其加以考虑可以提高计算准确性. 

Numerical simulation on gas dynamic resonance heating effect

To study the interior flow of the resonance tube, the model of the nozzle-cylindrical resonance tube system was established, and the gas dynamic resonance heating effect was simulated. The explicit second-order NND scheme was used to solve the 2-D axisymmetric Reynolds averaged N-S equations. The heat transfer effects of the resonance tube were considered by heat transfer equations. The pressure and temperature oscillation curves at the resonance tube end were obtained and the computational data were in good agreement with the experimental data. The results show that gas dynamic resonance heating is performed in about twenty milliseconds, and the heat transfer effects of the resonance tube affect the temperature of gas dynamic resonance heating highly and should be considered in computation and application.