摘要
Lift-to-drag ratio (L/D) is nearly the most important index in determining the aerodynamic performance of a hypersonic flight vehicle,because the flight distance is linearly proportional to the L/D according to Breguet's equation.In general,the higher the L/D of a vehicle,the greater the flight range if the specific impulse,structural mass ratio,and flight velocity are given.Naturally,the pursuit of a high L/D for hypersonic vehicles has never ceased [1,2].
基金
supported by the National Natural Science Foundation of China(Grant No.11572333)
the State Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences(Grant No.LHD2017TC01)
the Chinese Academy of Sciences Foundation Frontier Scientific Research Program(Grant No.ZDBS-LY-JSC005)。
