抽吸控制对低雷诺数下翼型分离流动的影响

doi:10.7527/S1000-6893.2013.0314

Abstract

Abstract:

In order to research the effects of suction zone locations with respect to separation point, hole spacings and diameters on separated flow suppression under suction control, some local porous suction distributions are designed on the NACA0012 airfoil upper surface, where the flow separation often happens at low Reynolds numbers. The effectiveness of the designed suction distributions is numerically investigated, by using AUSM⁺-up scheme, large eddy simulation method and lower-upper symmetric Gause-seidel (LU-SGS) implicit scheme with dual-time-stepping technique. The computational results show that when the suction zone is located behind the separation point, the control effect is best. The suction coefficient should be limited by a minimum value to obtain fast and effective control effect, also must be limited by a maximum value to ensure the figure-of-merit (FOM) of suction control is larger than one. The hole spacings and diameters have smaller effects on airfoil aerodynamics performance, but larger influences on FOM distributions.

Key words: flow control, boundary layer suction, low Reynolds numbers, flow around airfoil, flow separation

CLC Number:

V211.3

ZHANG Wanglong, TAN Junjie, CHEN Zhihua, REN Dengfeng. Effect of Suction Control on Separation Flow Around an Airfoil at Low Reynolds Numbers[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(1): 141-150.

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Effect of Suction Control on Separation Flow Around an Airfoil at Low Reynolds Numbers

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