运载火箭一级飞行段底部力的机理分析

摘要

The phenomenon that there are always excessive residual propellants at the end of the 1st stage flight phase for a certain liquid rocket is deeply studied. From dynamics point of view, the main components of the thrust of the launch vehicle are analyzed. It is found that the effect of the engine nozzle perturbation flow on rocket’s bottom causes the formation of the Base-force during the 1st stage flight phase. Finally, the parenthesis coefficient difference of the atmospheric drag is analyzed.%通过对某液体运载火箭一级飞行结束时推进剂剩余量稳定偏多现象的研究，从飞行动力学的角度分析了火箭推力的主要组成，揭示了火箭一级飞行段底部力的成因——发动机喷口扰流作用在运载火箭底部而引起，最后分析了大气阻力系数的偏差。