Experimental study was conducted concerning active control of supersonic jet noise with a microjet injection technique. The microjets were injected into a rectangular main jet with Mach number up to 1.49. The nozzle lip of the main jet was equipped with 44 injection holes of the microjets, whose angles against the main jet were changed as 60 and 90 degrees. From far-field sound pressure data, a significant reduction of the jet noise by several dB was found in the cases with 60 and 90 degrees of injection angles. The microjet was found to affect all components of supersonic jet noise, namely, turbulent mixing noise, shock-associated broadband noise and screech tone noise. In the results of FFT analysis, the effect of the microjet was observed in the sound pressure level of the shock-associated broadband noise, the pressure level and frequency of the screech tone noise, and average level of the turbulent mixing noise. Schlieren visualization was also made for the jet flow, and the microjet was seen to change the shock structure and shear layer behavior of the supersonic jet.
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ASME Turbo Expo 2009: Power for Land, Sea, and Air
June 8–12, 2009
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4888-3
PROCEEDINGS PAPER
Experimental Study of Supersonic Jet Noise Reduction With Microjet Injection Available to Purchase
Toshinori Watanabe,
Toshinori Watanabe
University of Tokyo, Tokyo, Japan
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Ryuichi Okada,
Ryuichi Okada
University of Tokyo, Tokyo, Japan
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Seiji Uzawa,
Seiji Uzawa
University of Tokyo, Tokyo, Japan
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Takehiro Himeno,
Takehiro Himeno
University of Tokyo, Tokyo, Japan
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Tsutomu Oishi
Tsutomu Oishi
IHI Corporation, Tokyo, Japan
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Toshinori Watanabe
University of Tokyo, Tokyo, Japan
Ryuichi Okada
University of Tokyo, Tokyo, Japan
Seiji Uzawa
University of Tokyo, Tokyo, Japan
Takehiro Himeno
University of Tokyo, Tokyo, Japan
Tsutomu Oishi
IHI Corporation, Tokyo, Japan
Paper No:
GT2009-59436, pp. 719-727; 9 pages
Published Online:
February 16, 2010
Citation
Watanabe, T, Okada, R, Uzawa, S, Himeno, T, & Oishi, T. "Experimental Study of Supersonic Jet Noise Reduction With Microjet Injection." Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 7: Turbomachinery, Parts A and B. Orlando, Florida, USA. June 8–12, 2009. pp. 719-727. ASME. https://doi.org/10.1115/GT2009-59436
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