In order to adapt to the high altitude jet simulation test of Mach number continuously adjustable nozzle design requirements for inferior taller than the case of a single pivot nozzle flow and dynamically adjust the quality is difficult to guarantee the performance characteristics,and study single fulcrum semi-flexible nozzle and rotating nozzle profile technology.First,based on the same aerodynamic principles and design methods,respectively,on a single pivot semi-flexible nozzle rigid coupling type surface profile technology and rotating nozzle design point evaluation methods were studied;secondly,by numerical calculation,respectively for the two key technology categories nozzle validated analysis,and on this basis,developed a small-scale model nozzle technology for verification;and finally,to validate the model wind tunnel test study conducted nozzle.The results showed that both nozzle technologies have achieved a good aerodynamic profile response and dynamic performance adjustment,the flow field quality is better than specification target,but the overall performance of a single pivot semi-flexible nozzle better,high-altitude jet test cabin research provides support.
wind tunnel testsfree jetnozzlevariable Mach numberaerodynamic profileflow field quality
NETL
NSTL
万方数据
