Study on Counter-Flow Thrust Vecotring Nozzle Jet Attachment and Control
Jet attachment occurs after counter shear layer instability, and it is a critical restriction on the usage of counter-flow thrust vectoring nozzle, which will lead to the control invalidation of vector thrust. Therefore, more attention should be paid to jet attachment phenomenon, when aerodynamic and geometric parameters are investigated. Based on CFD numerical simulation, the mechanism, characteristics and forming course of jet attachment were analyzed, and two methods for jet detaching were proposed, including decrease suction pressure ratio and increase nozzle pressure ratio. Results show that during suction pressure ratio decrease and increase a hysteresis loop of thrust vector angle v. s suction pressure appears, and critical suction pressure ratio is 0. 39 and 0. 34 respectively. In spite of evident hysteresis, the control of suction and nozzle pressure ratio is efficient techniques to achieve jet detachment.
fluidic nozzle thrust vectoring jet attachment flow control
SHI Jing-wei WVNG Zhan-xue ZHANG Xiao-bo LIU Zeng-wen
School of Power and Energy, Northwestern Polytechnical University, Xian, China
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
60-64
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）