Physics of gust response mitigation in open-loop pitching manoeuvres
Physics of gust response mitigation in open-loop pitching manoeuvres
复制标题
开环俯仰操纵中阵风响应缓解的物理原理
DOI:
10.1017/jfm.2022.509
复制
发表时间:
2022
影响因子:
3.7
通讯作者:
Jones, Anya R.
中科院分区:
文献类型:
--
作者:
Sedky, Girguis;Gementzopoulos, Antonios;Andreu-Angulo, Ignacio;Lagor, Francis D.;Jones, Anya R.
This paper experimentally investigates the flow field development and unsteady loading of three force-mitigating pitch manoeuvres during a transverse gust encounter. The manoeuvres are constructed using varying levels of theoretical and simulation fidelity and implemented as open-loop kinematics in a water towing tank. It is found that pitch actuation during a gust encounter results in two important changes in flow topology: (i) early detachment of the leading-edge vortex (LEV) and (ii) formation of an LEV on the pressure side of the wing upon gust exit. Each of the pitch manoeuvres is found to mitigate a significant portion of the circulatory contribution of the lift force while only manoeuvres with accurate modelling of the added-mass force are found to adequately mitigate the total lift force. The penalty of aerodynamic lift mitigation using pitch manoeuvres was a twofold increase in the pitching moment transients experienced by the wing for all cases. By quantifying changes in the vertical gust momentum before and after the encounter, lift-mitigating manoeuvres were found to reduce the disturbance to the gust's flow field, thereby reducing the momentum exchange between the gust and the wing.
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DOI:
--
发表时间:
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期刊:
影响因子:
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--
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期刊:
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