Flow Field Simulation And Optimization Design On Structure Of Thrust Vectoring Nozzle

The development of aerospace technology has promoted the performance requirements of the thrust vector device of the aircraft.The traditional mechanical thrust vector nozzle has not satisfied the speed of the development of the thrust vector technology because of its own defects.The performance advantage of the jet thrust vector technology can meet there quirements of a new generation of aircraft.So it has been a new research direction.In this paper,a jet-type thrust vector nozzle is proposed.The mathematical model of the thrust vector nozzle is obtained by Fluent simulation.It is analyzed by velocity contours and pressure contours,and analyzed the reason of the main flow change direction in thrust vector nozzle among them,the main contents are as follows:The reason of the variation of the thrust vector in different working conditions is simulated,and the rationality of the change of the gas in the thrust vector nozzle is analyzed,so as to ensure the authenticity of the modeling and simulation process;according to the parameters of the secondary jet structure,the influence law of each structural parameter,and the conclusion is given to provide the theory for optimization.An optimization design scheme is crucial for thrust vector nozzle.however,there has been no any method recognized so far.This paper presents method for nozzle optimization design based on the Isight.In this method,the design of experiment and multi-objective optimization are adopted.And the fluid analysis software are fluent is integrated to calculate the fluid parameters of Nozzle.The comparison of the optimization results obtained by both the presented and the traditional methods shows that the nozzle optimization method based on the Isight is satisfactory and feasible.Compared the scheme of optimal with initial nozzle.The same working condition of velocity contours,pressure contours,velocity vectors and Turbulent Kinetio energy are compared The thrust vector angle,the thrust vector coefficient and the thrust vector efficiency are calculated by the obtained data,and the concrete performance of the optimized thrust vector nozzle is improved according to the calculated results,so as to ensure the rationality of optimization.