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Influence of Microjet Condition on Characteristics of Supersonic Jet Noise and Flow Field

[+] Author Affiliations
Ryuichi Okada, Toshinori Watanabe, Seiji Uzawa, Takehiro Himeno

University of Tokyo, Tokyo, Japan

Tsutomu Oishi

IHI Corporation, Tokyo, Japan

Paper No. GT2012-68821, pp. 173-183; 11 pages
doi:10.1115/GT2012-68821
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4467-0
  • Copyright © 2012 by ASME

abstract

Jet noise reduction is essential for environmentally-friendly civil transport. Since jet noise becomes very intense in the case of supersonic aircraft, noise reduction is crucial topic for the realization of next-generation supersonic transport.

In the present study, experimental investigations were performed to clarify the effect of microjet injection on supersonic jet noise and flow field. The experiments were focused on supersonic jet with Mach number up to 1.47, which was generated from a rectangular nozzle with high aspect ratio.

Far-field acoustic measurements were conducted for widely ranged microjet conditions to understand the influence of the condition on characteristics of supersonic jet noise and flow field. For understanding the unsteady behavior of the flow field and the relation with noise reduction, flow field visualization was performed with schlieren technique using a high-speed camera.

Copyright © 2012 by ASME

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