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首页> 外文期刊>Journal of aerospace engineering >Hysteretic Behaviors in Counter-Flow Thrust Vector Control
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Hysteretic Behaviors in Counter-Flow Thrust Vector Control

机译：逆流推力矢量控制中的磁滞行为

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摘要

Hysteresis phenomena for shock wave reflections in the supersonic jet were already studied in the literature and reported that hysteretic behaviors were affected by the transient pressure ratio. However, there is no investigation on the hysteresis phenomenon in counter-flow thrust-vector control. The objective of the present work is illustrating effective influences of hysteretic behaviors on deflection angle, static pressure distribution along the upper-suction collar, and the secondary mass-flow ratio in a counter-flow thrust-vector control system. The fully implicit finite volume method was selected to solve unsteady, compressible Reynolds-averaged Navier-Stokes equations with boundary conditions of pressure inlet and pressure outlet. Two-dimensional numerical simulations were carried out based on the standard k-epsilon turbulence model and standard wall function. Second-order accuracy was ensured to illustrate more insight into hysteresis phenomena in counter-flow thrust-vector control. Hysteretic behaviors were studied by changing pressure ratios with time linearly, which include the nozzle-pressure ratio and the secondary pressure ratio. Numerical results indicated that hysteresis loops of the deflection angle and the secondary mass-flow ratio were formed by varying the nozzle-pressure ratio or the secondary pressure ratio with time, respectively. (c) 2019 American Society of Civil Engineers.
机译：在文献中已经研究了超声速射流中冲击波反射的滞后现象，并报道了滞后行为受瞬态压力比的影响。但是，没有研究逆流推力矢量控制中的磁滞现象。本工作的目的是说明滞后性能对逆流推力矢量控制系统中的偏转角，沿上吸环的静压分布以及次级质量流量比的有效影响。选择完全隐式有限体积方法来求解具有压力入口和压力出口边界条件的非定常可压缩雷诺平均Navier-Stokes方程。基于标准kε湍流模型和标准壁函数进行了二维数值模拟。确保了二阶精度，以说明对逆流推力矢量控制中的滞后现象的更多了解。通过随时间线性变化压力比来研究滞后行为，其中包括喷嘴压力比和二次压力比。数值结果表明，通过随时间改变喷嘴压力比或次级压力比，分别形成了偏转角和次级质量流量比的磁滞回线。 （c）2019美国土木工程师学会。

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