The drag force is obtained by calculation of the momentum deficit in the wall boundary layer.
拖曳力，得到了计算的势头赤字在墙上的边界层。
2
Using numerical calculation, optimal roll program, the ratio of lift and drag, reentry Angle and reentry time of spacecraft are gotten.
通过数字计算，得到飞船的最优滚转程序、升阻比、再入角和再入终端时间。
3
The calculation results prove that unless the initial film thickness or the relative velocity is very large, the inner evaporation drag should be taken into account at high temperature conditions.