한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제37권9호
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  • Pages.889-898
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  • 2009
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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부분분사에서 작동하는 소형 사류형 터빈에서의 성능특성에 관한 연구

Performance Characteristics of a Partially Admitted Small Mixed-Type Turbine

  • 조종현 (경상대학교 항공공학과 대학원) ;
  • 김재실 (창원대학교 기계공학과) ;
  • 팽진기 (경상대학교 항공기부품기술연구센터) ;
  • 조수용 (경상대학교 항공기부품기술연구센터)
  • 발행 : 2009.09.01
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초록

본 연구에 적용된 터빈은 사류형 터빈이며 동익의 외경은 108 mm 이다. 터빈은 1.7-2.0%의 낮은 부분분사율에서 작동하므로 익형은 축류형으로 설계되었으며 2단으로 구성되었다. 분사가 축방향으로 형성된 경우와 반경방향으로 형성된 경우에 따른 성능특성의 차이가 연구되었다. 또한 터빈의 단수에 따른 성능특성도 비교 되었다. 터빈의 작동범위에 따른 비교를 위하여 회전수를 변경하면서 성능평가가 이루어졌을 뿐만 아니라 시스템의 평가를 위하여 총 비토오크가 얻어졌다. 사류형 터빈이므로 축방향으로 분사되는 경우가 반경방향으로 분사되어지는 경우보다는 양호한 성능을 얻었으며, 출구단 동익의 효과는 회전수에 의하여 좌우되지만 축방향 분사터빈 경우에 최대 7.8%의 비토오크 상승의 결과를 보여주었다.

A mixed-type turbine was adopted and the rotor outer diameter was 108 mm. Turbine rotors were designed to the axial-type blade because the turbine operated at a low partial admission rate of 1.7-2.0% with two stages. Performance characteristics were studied when the spouting from the nozzle was toward radially inward or outward direction. Additionally, the effect at each stage of the rotor was measured. For comparing with each turbine performance, properties were measured based on various rotational speeds. Measured net specific torque was used to compare with the turbine system performance. On the mixed-type turbine, better performance was obtained when the operating air spouted toward radially inward direction. The specific torque was increased by 7.8% from using the second stage although its effect depended on the rotational speed.

키워드

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피인용 문헌

  1. A Study of Operating Forces on a Partially Admitted Turbine Blade vol.38, pp.9, 2010, https://doi.org/10.5139/JKSAS.2010.38.9.890