Comparative research and experimental verification of adjustable nozzle technology for free jet
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
