Experimental study on jet turning based on spiral flap

WANG Jun; LAI Qingren; KANG Hongming; ZHANG Liu; LI Binbin; ZHAO Lei; JIN Yi

doi:10.11729/syltlx20210036

Volume 35 Issue 5

Nov. 2021

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WANG J，LAI Q R，KANG H M，et al. Experimental study on jet turning based on spiral flap[J]. Journal of Experiments in Fluid Mechanics, 2021，35（5）：47-53. doi: 10.11729/syltlx20210036

Citation:

WANG J，LAI Q R，KANG H M，et al. Experimental study on jet turning based on spiral flap[J]. Journal of Experiments in Fluid Mechanics, 2021，35（5）：47-53. doi: 10.11729/syltlx20210036

Citation:

WANG J，LAI Q R，KANG H M，et al. Experimental study on jet turning based on spiral flap[J]. Journal of Experiments in Fluid Mechanics, 2021，35（5）：47-53. doi: 10.11729/syltlx20210036

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Experimental study on jet turning based on spiral flap

doi: 10.11729/syltlx20210036

WANG Jun^{1, 2
,},
LAI Qingren²,
KANG Hongming²,
ZHANG Liu^{2
,
,},
LI Binbin³,
ZHAO Lei²,
JIN Yi^{4
,
,}

1.
Department of Precision Machinery and Precision Instruments, School of Engineering Science, University of Science and Technology of China, Hefei　230031, China
2.
Low Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang Sichuan　621000, China
3.
School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang Sichuan　621000, China
4.
Engineering and Materials Science Experimental Center, University of Science and Technology of China, Hefei　230031, China

Received Date: 2021-04-07
Rev Recd Date: 2021-05-18

Available Online: 2021-11-15

Publish Date: 2021-11-05

Abstract

Abstract

A new flow control flap, spiral flap, was designed by gradually increasing the curvature radius based on Archimedes helix theory. The influence of the key control parameters such as the initial radius and alignment radius of the spiral flap on the upper surface jet deflection is studied. The control effect of the spiral flap is compared with that of the traditional basic flap, and the control mechanism of the two is analyzed. The results show that the maximum average thrust deflection angle of the spiral flap is about 20°. Compared with the basic flap, the spiral flap has larger average thrust deflection angle and higher thrust efficiency at large drop pressure ratio, which indicates that changing the curvature profile can promote the flow adhesion of the jet and improve the performance of the upper surface blowing system.
- spiral flap,
- upper surface blowing,
- jet turning

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References(19)

References

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