ジェット騒音
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概要
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This paper deals with theoretical and experimental investigations of jet noise. The theoretical analysis is made on the directivity of jet noise, the frequency of peak spectra and the modified Strouhal number, by assuming that a sound level vanishes when it propagates through the jet flow. This analysis is an extension of the supersonic jet flow theory to the subsonic flow. Experimental investigation is performed by using model jet flow. The diameter of the jet nozzle is 5 cm and the exhaust jet velocity is 300 m/sec or less. The theoretical results are in good agreement with the experimental results. Also, it can be verified that the jet noise is attenuated by diffusing the jet flow with a diffuser, and the speaker sound vanishes when it propagates through the jet flow.
- 社団法人日本音響学会の論文
- 1977-07-01