음장 재구성에 의한 관내 평균유속 측정

DOI QR코드

DOI QR Code

김건순;정완섭;권휴상;박경암;백종승;유성연
Kim, Kun-Soon;Cheung, Wan-Sup;Kwon, Hyu-Sang;Park, Kyung-Am;Paik, Jong-Seung;Yoo, Seong-Yeon

  • 발행 : 2000.07.01

초록

This paper addresses a new technique of measuring the mean flow velocity over the cross sectional area of the pipe using sound field reconstruction. When fluid flows in the pipe and two plane waves propagate oppositely through the medium, the flow velocity causes the change of wave number of the plane waves. The wave number of the positive going plane wave decreases and that of negative going one increases in comparison to static medium in the pipe. Theoretical backgrounds of this method are introduced in detail and the measurement of mean flow velocity using the sound field reconstruction is not affected by velocity profile upstream of microphones.

키워드

음압;마하수;평균유속;위상;평면파;음속;파수

참고문헌

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