Experimental Study of Influence of Different Parameters on Flow Field Structures Around an Airfoil Covered with Rough Ice

doi:10.16183/j.cnki.jsjtu.2022.149

Abstract

Abstract:

Rough ice can change the leading edge of airfoil and affect the aerodynamic characteristics. Studying the influence of rough ice caused by supercooled water droplets can provide reference for anti-icing design of aircrafts. A detailed experimental study was conducted to measure the flow field structure of an airfoil model with rough ice in a low-speed wind tunnel by using particle image velocimetry. The parameters include Reynolds number, roughness of rough ice, and angle of attack. The results show that with the increase of Reynolds number, the range and value of spanwise vorticity at the wake of the airfoil with ice increased, while the normalized Reynolds stress decreased slightly. The presence of rough ice reduced the airflow velocity near the airfoil, increased the vorticity of wake, and seriously affected the shear stress distribution. Compared with the clean airfoil, the rough ice caused the air flow to separate earlier and the velocity in the separation bubble fluctuated more violently.

Key words: Reynolds number, supercooled large droplet, rough ice, angle of attack, flow field structure

CLC Number:

V211

ZHENG Chengyi, DU Xuzhi, DONG Qiaotian, YANG Zhigang, XIONG Bing, XU Yi, WU Linghao, JIN Zheyan. Experimental Study of Influence of Different Parameters on Flow Field Structures Around an Airfoil Covered with Rough Ice[J]. Journal of Shanghai Jiao Tong University, 2023, 57(9): 1221-1230.

Figures/Tables 16

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目数	Rz/μm	型号
150	185.6	—
180	158.0	R1
220	131.4	R2
240	124.6	—
280	119.4	R3
320	119.0	—
360	94.6	R4
400	97.4	—

粗糙冰	气流速度/(m·s^-1)	最大值位置(X/C×100)
R1	14.810	-30.044
R2	15.160	-16.338
R3	14.460	-45.700
R4	15.659	-16.338
光滑翼型	16.409	-13.400

粗糙冰	左极限 (X/C×100)	右极限 (X/C×100)	分离泡宽 (X/C×100)
光滑翼型	-125.762 5	-19.062 5	106.700 0
R4	-120.868 8	-18.087 5	102.781 3