Investigation of Supersonic Jet Noise Sources Using the Optical CT Method and a Microphone Array

平成24年度宇宙輸送シンポジウム (2013年1月17日-1月18日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県
Space Transportation FY2012 (January 17-18, 2013. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan
By use of schlieren optics and microphones, jet noise sources of a rectangular hypersonic nozzle are investigated experimentally. Tomographic reconstruction of density fluctuation distribution of the jet and the cross-correlation analysis between the schlieren optics and the microphones are carried out. Maximum cross-correlation distributions show that the sound wave is highly directional within the downstream cone angle. In order to discuss the intensity of noise sources, the amplitude of the light intensity fluctuation and the maximum cross-correlations are multiplied at each measured point, which indicate the contribution of local noise sources to each microphone. The accuracy of the optical CT method is verified using a microphone array.
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形態: PDF
Physical characteristics: Original contains color illustrations
Physical characteristics: PDF
資料番号: AA0061856025
レポート番号: STCP-2012-025