Numerical study on the flow control of vortex generators on large wind turbine blades

doi:10.3969/j.issn.1674-1951.2021.12.010

Abstract

Abstract:

In the introduction on the modeling method of vortex generators（VGs）on wind turbine blades,computational fluid dynamics（CFD）method was adopted to carry out numerical studies on an S809 airfoil and the airfoil at the cross section with 30% relative thickness of the blade on a 1.5 MW wind turbine.The flow control effect of VGs was carried out and analyzed.The results indicate that VGs can delay the stall angle of attack（AOA）and improve the maximum lift coefficient for the S809 airfoil.At low AOAs,the VGs slightly increase the airfoil drag because of its own shape.Due to the separation delay,VGs reduce the airfoil drag with an increase in AOA.When AOA excess 17.21°,the separation point will move forward to the front 20%c of the airfoil where VGs have no effect of drag reduction. The blunt trailing edge and large thickness of the airfoil of the 1.5 MW wind turbine provide good stall and a more prominent effect of lift enhancement and drag reduction.This research is a valuable reference for the VGs flow control of wind turbine blades.

Key words: wind turbine, flow control, vortex generators, CFD, blunt trailing edge, wind turbine blades

CLC Number:

TK83

ZHANG Jun, SU Yang, LI Yong, CONG Xingliang. Numerical study on the flow control of vortex generators on large wind turbine blades[J]. Integrated Intelligent Energy, 2021, 43(12): 66-71.

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项目		网格数/万	升力系数	阻力系数
1.02°攻角S809翼型涡流发生器计算结果	S809翼型	100.4	0.243 5	0.014 3
		131.8	0.244 3	0.014 8
		160.3	0.244 0	0.014 7
	S809翼型加涡流发生器	200.1	0.255 6	0.014 5
		245.9	0.256 8	0.015 1
		290.4	0.256 3	0.014 8
4°攻角某1.5 MW风力机翼型涡流发生器计算结果	某1.5 MW风力机翼型	101.5	0.722 3	0.023 5
		132.6	0.721 2	0.023 1
		165.2	0.722 8	0.023 7
	某1.5 MW风力机翼型加涡流发生器	203.4	0.734 1	0.025 2
		252.4	0.732 8	0.024 6
		307.8	0.733 6	0.024 9