分开排气式喷管喷流噪声预测及试验研究

doi:10.7527/S1000-6893.2015.0257

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (6): 1790-1797.doi: 10.7527/S1000-6893.2015.0257

• Fluid Mechanics and Flight Mechanics • Previous Articles Next Articles

Experimental and prediction research on jet noise for separated exhaust nozzle

WU Fei¹, SHAO Wanren¹, HE Jingyu², LI Xiaodong², WANG Deyou¹

1. AVIC Shenyang Aeroengine Design and Research Institute, Shenyang 110015, China;
2. School of Energy and Power Engineering, Beihang University, Beijing 100083, China

Received:2015-04-07 Revised:2015-09-16 Online:2016-06-15 Published:2015-10-16
Supported by:
National Basic Research Program of China(2012CB720201)

Abstract

Abstract:

In order to reveal the distribution of frequency spectrum and directivity for the separated exhaust nozzle, prediction and experiment are conducted for scaled mode, then full-scale nozzle model of basic and chevron are calculated. The result shows that Tam & Auriault's jet noise prediction theory is used to predict the noise spectra and direction of far-field noise, and jet noise possesses obvious direction. Compared with basic nozzle, the reduced effect of jet noise with chevron is better. Chevrons are fixed only in primary nozzles which have worse ability of low-frequency noise reduction and the high-frequency noise increase by contrast with chevrons which are fixed in primary and bypass nozzles. The overall sound pressure level (OASPL) value of chevrons which are fixed only in primary nozzles is less than that of chevrons fixed in primary and bypass nozzles at the angle of directivity smaller than 88° in this paper.

Key words: separated exhaust, jet noise, Tam &, Auriault' method, chevron, overall sound pressure level (OASPL)

CLC Number:

V231.1

WU Fei, SHAO Wanren, HE Jingyu, LI Xiaodong, WANG Deyou. Experimental and prediction research on jet noise for separated exhaust nozzle[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(6): 1790-1797.

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Experimental and prediction research on jet noise for separated exhaust nozzle

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