航天运载器采用负升力返回再入研究

Reentry Flight Using Negative Lift of Space Vehicle

研究了采用负升力返回时航天器的再入走廊与轨迹，通过数值仿真和与正升力再入时的结果比较，得到结论：在大升阻比情况下，采用负升力再入时的返回走廊前三分之一段较采用正升力的相应部分宽度有较大增加，离轨点所耗燃料质量与热防护系统质量之和较正升力再人时的情况有一定减小；在小升阻比情况下，正、负升力再入时轨道特性、有效载荷基本相同。从而得出，负升力再入概念在提高有效载荷上明显优越于正升力再入概念。

The corridor and trajectories of space vehicle during reentry flight using negative lift are studied. Numerical results are obtained for the corridors and trajectories using negative and positive lift respectively.Then the conclusions are obtained as:Under the circumstances of larger lift-drag-ratio,the first one third reentry corridor using negative lift is wider than the one using positive lift,the total mass cost(TMC)by negative lift is smaller than the one by positive lift,where TMC is the total mass of the fuel consumption for the vehicle to deorbit from the mission orbit and thermal protection system of the vehicle;under the circumstances of smaller lift-drag-ratio,the two kinds of reentry trajectories produced by positive lift and negative lift are approximately the same.Therefore, the concept of return flight using negative lift is superior to the one using positive lift.