基于被动二次流的射流偏转比例控制

doi:10.7527/S1000-6893.2014.0116

Abstract

Abstract:

The proportional control of jet deflection is always one of the goals of fluidic thrust vectoring (FTV) technology. A two-dimensional new fluidic thrust vectoring nozzle is designed and manufactured. Thrust vector control of the low-speed primary jet is investigated using passive secondary flow and Conada wall surfaces, which has ultra-low energy consumption. The primary jet can be continuously and proportionally vectored by changing the area of entrance of nozzle control slot. The pressure of control slots on both sides and deflection angle of the primary jet are measured; the control curve of the primary jet deflection angle versus the coefficient of pressure difference between control slots is obtained. The results show that the maximum deflection angle of the low-speed primary jet is up to 19°; the control curve is divided into sensitive zone and inert zone in the deflection range. The control curve of sensitive zone is approximately linear with steep slope, within a range of ±15°; while the inert zones are from -19° to -15° and from +15° to +19°, where the control curve slope is gentle. The experimental results demonstrate that the pressure difference between both sides of the primary jet is the direct cause of jet deflection.

Key words: fluidic thrust vectoring, thrust vector nozzle, secondary flow, flow control, proportional control, Coanda effect

CLC Number:

V211.71

CAO Yongfei, GU Yunsong, CHENG Keming, XIAO Zhongyun, CHEN Zuobin, HE Kaifeng. Proportional control of jet deflection with passive secondary flow[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(3): 757-763.

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Proportional control of jet deflection with passive secondary flow

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