유체기계공업학회:학술대회논문집
- 유체기계공업학회 2000년도 유체기계 연구개발 발표회 논문집
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- Pages.211-218
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- 2000
가스터빈용 소형 원심압축기의 탈설계점 성능에 관한 실험연구
Experimental Study on Off-Design Performance of a Small Centrifugal Compressor for Gas Turbine Applications
- 발행 : 2000.12.01
초록
Off-design experimental performance was investigated for a small centrifugal compressor, whose impeller diameter is about 125mm, used in an industrial gas turbine. Test rig was designed and manufactured with a radial inflow turbine and a combustor to supply driving power to the compressor. Static pressure was measured on the casing of the impeller, vaneless diffuser, vaned diffuser and volute. Total pressure was obtained using specially fabricated rakes at the vaned diffuser throat and exit. Circumferential nonuniformity was found, near surge, in the Impeller, vaned diffuser and volute region. Spanwise nonuniform flow from the impeller affected the total pressure defects in the vaned diffuser region. Static pressure distortion in the circumferential direction in the volute was found near surge, where the minimum occurred near 140 degree position.