Application of arbitrary length nozzle design method to gasdynamic laser nozzle design

An arbitrary length nozzle design method(ALN method) is applied to the nozzle design of a gasdynamic laser. For comparison, four ALN nozzles and one MLN nozzle (designed by minimum length nozzle design method) are designed with the same Mach number on nozzle exit plane, the same height of nozzle throat and the same length of nozzle. Two-dimensional small signal gain(SSG) field simulation is carried out for the five nozzles and the simulation results indicate that the ALN method can control the SSG field distribution of nozzle effectively. ALN nozzles with proper design parameters can obtain shorter nozzle length and bigger SSG than MLN nozzles.