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이용봉(Y. B. Lee),윤병로(B. R Yoon),권휴상(H. S. Kwon),박경암(K. A. Park),유선학(S. H. Yoo) 한국유체기계학회 2001 유체기계 연구개발 발표회 논문집 Vol.- No.-
Noise is one of the major environmental problems in human life. To reduce the noise emitted from the control valve it is necessary to develop the measurement method, measurement system, analysis method applicable to the field. In this study IEC and ISO standards were investigated and measurement method for the valve noise was proposed. Noise from the valve was measured in the reverberation room and sound power level was calculated. The sound power level increased as the flow rate and pressure difference increased. The noise characteristics are useful to predict valve noise for given conditions, to compare the performance of different valves and to develope low-noise valves.
배관 형상이 다회선 초음파 유량계의 특성에 미치는 영향
박경암(K. A. Park),최용문(Y. M. Choi),최해만(H. M. Choi),윤병로(B. R. Yoon),황규보(K. B. Hwang) 한국유체기계학회 1999 유체기계 연구개발 발표회 논문집 Vol.- No.-
Five-path ultrasonic flowmeters (200 and 300 ㎜ diameters) were tested to obtain it's characteristics in a water flow standard system. A five-path ultrasonic flowmeter was installed after various pipe fittings (elbow, valve, tee) or a pump. The distance between flow disturbance source and a flowmeter was main experimental parameter. Without a flow conditioner, a five-path ultrasonic flowmeter shows good characteristics as the distance between flow disturbance source and a flowmeter is longer than 10 diameter of a flowmeter.