• 제목/요약/키워드: 벌류트케이싱

검색결과 3건 처리시간 0.018초

액체로켓 터보펌프 벌류트 케이싱의 파열시험 (Burst Test of Volute Casings for Liquid Rocket Turbopump)

  • 윤석환;전성민;김진한
    • 한국유체기계학회 논문집
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    • 제14권4호
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    • pp.12-18
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    • 2011
  • Volute casings for liquid rocket turbopump are designed and evaluated in a structural point of view. At the design step 3D modeling and finite element analyses are conducted iteratively. During the step various loads such as internal pressure, casing stiffness and mounting forces are considered in the analyses, along with the weight minimization effort. After the design step volute casings are manufactured by metal casting process, and then they are subjected to burst test for structural verification. In the burst test strains at several points are measured and compared with predicted values.

원형케이싱이 극저비속도 원심펌프의 성능에 미치는 영향 (Influence of Circualr Casing on the Performance of Very Low Specific Speed Centrifugal Pump)

  • 최영도;카가와슈사쿠;쿠로카와준이치
    • 한국유체기계학회 논문집
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    • 제9권1호
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    • pp.32-39
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    • 2006
  • Recently, according to the trend of small size in scale and high speed in rotation of turbomachinery, very low specific speed centrifugal pump is taking a growing interest because the pump is characterized by high head and low flow rate with convenience of manufacturing and maintenance compared with conventional positive displacement pump. However, the efficiency of the very low specific speed centrifugal pump drops rapidly with the decrease of specific speed. The purpose of this study is nor only to examine the influence of casing type on the performance of centrifugal pump in the range of very low specific speed but also to determine the proper casing type for the improvement of pump performance. The results show that circular casing is suitable for the centrifugal pump in the range of very low specific speed and the influence of impeller configuration on the pump performance is very small. Radial thrust in the circular and volute casings is considerably small in the range of very low specific speed.

원심펌프 배관계 진동에 영향을 주는 블레이드 가진주파수의 실험적 고찰 (Experimental Study on the Blade Excitation Frequency for the Natural Frequence of Centrifugal Pump Piping Systems)

  • 김윤제;신호길
    • 에너지공학
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    • 제10권4호
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    • pp.335-341
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    • 2001
  • 펌프에서는 회전차와 케이싱의 간섭에 의해 압력 펄스가 발생하게 되는데, 이러한 압력 펄스가 펌프의 배관계와 공진을 형성하게 되면 큰 진동 및 소음을 일으켜 문제를 야기시킬수 있다. 따라서 본 연구에서는 단단·한쪽흡입형 벌류트 펌프를 대상으로 하여 펌프성능에 영향을 미치는 인자 가운데 회전차 외경과 흡입경을 고정하고, 깃의 입·출구각과 깃 수를 단계적으로 변화시켜 이에 따른 압력펄스의 변화와 배관계와 공진현상 조건을 실험적으로 규명하였는데, 배관계의 진동은 토출량 및 펌프의 회전수보다 배관 및 회전차의 형상에 크게 영향을 받음을 알았다.

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