A Return Scheme Design Method for the First Sub-stage of a Launch Vehicle
A concept design method for the return of the first sub-stage of a launch vehicle is proposed. It provides a solution for the overall design of a recoverable Launch vehicle. Firstly,a motion model for return of first stage is built. In order to calculate the thrust and its adjustment range,two parameters that named thrust ratio and thrust adjustment factor are defined in the model. Secondly,relation between recovery thrust and left propellant is discussed. A constraint of left propellant is introduced. Finally,a return scheme of a first stage is planned through a simulation example. The method proposed answers such questions as how much propellant should be reserved to realize the return of the first stage,how much thrust should be used,what is the adjustment range of thrust during the return process,the landing point of the stage,the max velocity during the return,and height and velocity before the stage enters the landing phase. The example shows that this method can be used to plan a complete return scheme for the first stage of a launch vehicle.
reusable launch vehiclereturn of sub-stage of launch vehiclelaunch vehicle design
NETL
NSTL
万方数据
