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5공과 7공 프로브를 이용한 터빈 캐스케이드의 이차유동 측정 결과 비교연구

Comparative Study on the Secondary Flow Measurement in a Turbine Cascade Using 5-hole and 7-hole Probes

  • 노영철 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 이용진 (한국항공대학교 항공우주 및 기계공학과 대학원(국방기술품질원)) ;
  • 박정신 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 김학봉 (한국항공대학교 항공우주 및 기계공학과) ;
  • 곽재수 (한국항공대학교 항공우주 및 기계공학과 대학원)
  • 투고 : 2009.12.21
  • 심사 : 2010.11.22
  • 발행 : 2010.12.01

초록

Comparative study on the flow measurement by 5-hole and 7-hole probes was conducted in a linear cascade with tip clearances of 2.3%, 3.1%, and 4.4% of the blade span. Calibration range of the 5-hole and the 7-hole probes were ${\pm}25$ and ${\pm}50$ degrees, respectively. Results show that the secondary flow and total pressure loss measured by the 5e-hole and 7-hole probes were similar at small tip clearance cases. However, at the tip clearance of 3.1% and 4.4% of the blade span cases, flow angles exceeding the calibration range of the 5-hole probe were observed. Because of the wider calibration range, larger flow angle by strong leakage vortex could be measured by the 7-hole probe.

키워드

참고문헌

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