Advanced SearchSearch Tips
A Study on Pressure Distributions in a Centrifugal Compressor Channel Diffuser
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Study on Pressure Distributions in a Centrifugal Compressor Channel Diffuser
Gang, Jeong-Sik; Gang, Sin-Hyeong;
  PDF(new window)
Time averaged pressure distributions in a high-speed centrifugal compressor channel diffuser at design and off-design flow rates are investigated. Pressure distributions from the impeller exit to the channel diffuser exit are measured for various flow rates from choke to near surge condition, and the effects of operating condition are discussed. The strong non-uniformity in the pressure distribution is obtained over the vaneless space and semi-vaneless space caused by the impeller-diffuser interaction. As the flow rate increases, flow separation near the throat, due to large incidence angle at the vane leading edge, increases aerodynamic blockage and reduces the aerodynamic flow area downstream. Thus the minimum pressure location occurs downstream of the geometric throat, and it is named as the aerodynamic throat. And at choke condition, normal shock occurs downstream of this aerodynamic throat. The variation in the location of the aerodynamic throat is discussed.
Channel Diffuser;Centrifugal Compressor;Pressure Distribution;
 Cited by
원심압축기 스톨 발단에 관한 실험적 연구 (I) - 스톨 발단 과정 -,강정식;강신형;

대한기계학회논문집B, 2001. vol.25. 10, pp.1436-1444 crossref(new window)
Krain, H., 1981, 'A Study on Centrifugal Impeller and Diffuser Flow,' ASME Journal of Engineering for Power, Vol. 103, Oct., pp. 688-696

Krain, H., 1984, 'Experimental Observations of the Flow in Impellers and Diffusers,' VKI Lecture Series, 1984-07

Kano, F., Tazawa, N.and Fukao, Y., 1982, 'Aerodynamic Performance of Large Centrifugal Compressors,' ASME Journal of Engineering for Power, Vol. 104, pp. 796-804

Dawes, W.N., 1995, 'A Simulation of the Unsteady Interaction of a Centrifugal Impeller With Its Vaned Diffuser: Flow Analysis,' ASME Journal of Turbomahinery, Vol. 121, pp. 304-311

Justen, F., Ziegler, K.U., and Gallus, H.E., 1998, 'Experimental Investigation of Unsteady Flow Phenomena in a Centrifugal Compressor Vaned Diffuser of Variable Geometry,' ASME Paper No. 98-GT-368

조성국, 강신형, 1998, '소형 원심압축기의 성능평가에 대한 실험적 연구,' 대한기계학회논문집 B권, 제22권 제8호, pp. 1052-1063

Kang, S.H., Kang, J.S., and Cho, S.K., 1998, 'A Hybrid Method of Performance Prediction for Channel Diffusers,' Proceedings of the Fourth KSME-JSME Fluids Engineering Conference, pp. 105-108

강정식, 1998, '원심압축기 베인 디퓨저의 설계 및 성능평가에 관한 연구,' 서울대학교 대학원 공학석사학위논문

강신형, 강정식, 1998, '원심압축기 채널디퓨저의 설계 및 성능평가에 관한 연구,' 유체기계공업학회 '98 강연회 및 연구개발발표회 논문집, pp. 164-178

Kline, S.J. and McClintock, F.A., 1953, 'Describing Uncertainties in Single Sample Experiments,' Mecanical Engineering, January

강정식, 조성국, 강신형, 1999, '원심압축기 채널디퓨저 내부의 비정상 압력분포,' 유체기계 연구개발 발표회 논문집, pp. 69-77

Kang, J.S., Cho, S.K., and Kang, S.H., 2000, 'Unsteady Flow Phenomena in a Centrifugal Compressor Channel Diffuser,' ASME Paper No. 2000-GT-451

Inoue, M., 1980, 'Centrifugal Compressor Diffuser Studies,' Ph. D. Thesis, Dept. of Engineering, Churchill College, Cambridge University, May