Aerodynamic Design and Analysis of Thrust-vectoring Nozzles

The two-dimensional(2D) thrust-vectoring nozzle has simple configuration and good stealthy performance.Thus it has been applied to some stealthy aircrafts.A method to design round-to-square nozzle was developed.Based on it,a 2D nozzle and two types of thrust-vectoring nozzles were designed.And the first type nozzle is achieved by geometry deflection of the round-to-square nozzle meanwhile the second type nozzle is achieved by deflection of the aerospike located in round-to-square nozzle.Then the inner and outer flow of the round-to-square nozzle and two types of thrust-vectoring nozzles are simulated numerically.Also the thrust coefficient,flux coefficient and thrust-vectoring angle of the nozzles are obtained and analyzed.Finally,the influencing factors and laws in thrust-vectoring angle of the nozzles are obtained,which are valuable for designing 2D thrust-vectoring nozzles.