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2차원 공동 유동에서의 소음원 위치 판별을 위한 실험적 연구
이재형(Lee, Jaehyung),박규철(Park, Kyu-Chol),최종수(Choi, Jong-Soo) 한국소음진동공학회 2004 한국소음진동공학회 논문집 Vol.14 No.12
This paper presents an acoustic source localization technique on 2D cavity model in flow using a phased microphone array. Investigation was performed on cavity flows of open and closed types. The source distributions on 2D cavity flow were investigated in an anechoic open-jet wind tunnel. The array of microphones was placed outside the flow to measure the far field acoustic signals. The optimum sensor placement was decided by varying the relative location of the microphones to improve the spatial resolution. Pressure transducers were flush-mounted on the cavity surface to measure the near-filed pressures. It is shown that the propagated far field acoustic pressures are closely correlated to the near-field pressures and their spectral contents are affected by the cavity parameter L/D.