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火箭级间不同排焰窗位置构型会对级间动态热分离过程产生影响,采用耦合求解轴对称非定常N-S方程与一维分离动力学方程的方法,开展了多个工况的数值仿真,研究了不同排烟窗位置的影响。结果表明,排焰窗位置更加靠近二级火箭时有利于两级火箭在分离过程中获得较高的相对加速度,促进两级火箭的快速分离。但此时级间区域流场在分离过程中存在剧烈震荡的阶段,而当排焰窗位置更加靠近一级火箭时,级间区域流场则相对平稳,一级火箭前封头受力也更加均匀。
Different positions of the flamethrower flame vents will affect the interstage dynamic thermal separation process. The numerical simulation of several working conditions is carried out by coupling and solving the unsteady NS equations of axial symmetry and the one-dimensional separation kinetic equation. The effect of different exhaust windows was studied. The results show that when the position of the flame-exhaust window is closer to the second-stage rockets, the relative accelerations of the two-stage rockets in the separation process are facilitated, and the rapid separation of the two-stage rockets is promoted. However, at this time, the flow field in the interstage region has violent and turbulent phases in the separation process. When the position of the flame vent window is closer to the first stage rocket, the flow field in the interstage region is relatively stable, Evenly.