Wind tunnel test research on the characteristics of rotor blade-vortex interaction noise

LIU Xiangnan; LIU Shaoteng; ZHOU Guocheng; SHAO Tianshuang; CHEN Bao

doi:10.11729/syltlx20210190

Volume 37 Issue 3

Jun. 2023

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Article Navigation > Journal of Experiments in Fluid Mechanics > 2023 > 37(3): 84-91

LIU X N, LIU S T, ZHOU G C, et al. Wind tunnel test research on the characteristics of rotor blade-vortex interaction noise[J]. Journal of Experiments in Fluid Mechanics, 2023, 37(3): 84-91 doi: 10.11729/syltlx20210190

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Wind tunnel test research on the characteristics of rotor blade-vortex interaction noise

doi: 10.11729/syltlx20210190

LIU Xiangnan^{1, 2, 3
,
,},
LIU Shaoteng^{1, 2, 3},
ZHOU Guocheng^{1, 2, 3},
SHAO Tianshuang^{1, 2, 3},
CHEN Bao^{1, 2, 3}

1.
AVIC Aerodynamics Research Institute, Harbin　150001, China
2.
Low Speed High Reynolds Number Aeronautical Key Laboratory, AVIC Aerodynamics Research Institute, Harbin　150001, China
3.
Aerodynamic Noise and Control Key Laboratory of Heilongjiang Province, AVIC Aerodynamics Research Institute, Harbin　150001, China

Received Date: 2021-12-22
Accepted Date: 2022-03-17
Rev Recd Date: 2022-02-05
Publish Date: 2023-06-25

Abstract

Abstract

The propagation characteristics of the blade–vortex interaction (BVI) noise were tested in the FL–10 wind tunnel of AVIC Aerodynamics Research Institute. The aerodynamic noise of climb, level flight and descent at medium forward speed was measured on a 40% scale model of BO−105 main rotor. Firstly, the “Heyson” wall interference correction method was used to determine the descent angle of the rotor in the wind tunnel, and the complete noise radiation field under the rotor tip–path–plane was obtained through the movement of the measurement array in the airflow. Furthermore, the BVI noise characteristics of the rotor under different flight condition were studied, and the sound pressure time history, spectrum and sound pressure level contour were given. The results indicate that the BVI phenomena occur on both the advancing and retreating side under the descent flight condition. The noise has strong directivity, and radiates toward upstream under the rotor disk toward the advancing side and the downstream on the retreating side.
- helicopter,
- wind tunnel test,
- blade–vortex interaction,
- aerodynamic noise; rotor,
- descent flight

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References(28)

References

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