There are a variety of influential factors to the combustion efficiency of secondary chamber of boron-based propellant ducted rocket motor
which are difficult to be expressed accurately by analytical functions.Atwo-phase turbulent flow combustion value simulation model was firstly established within the secondary chamber of the rocket motor.Then
the structural optimization of secondary chamber of Boron-based propellant ducted rocket motor was achieved through the response surface based on orthogonal polynomial.This method allows to compute less frequently the flow field of secondary chamber in obtaining the approximate functions
and makes it easier to optimize and analyze the parameters of secondary chamber of boron-based propellant ducted rocket motor.