대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제35권10호
  • /
  • Pages.1005-1012
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  • 2011
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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원형 노즐과 타원형 노즐에서 발생되는 캐비테이션 유동

Cavitating Flow in Circular and Elliptical Nozzles

  • Ku, Kun-Woo (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.) ;
  • Hong, Jung-Goo (Institute of Mechanical Engineering Technology, Kyungpook Nat'l Univ.) ;
  • Lee, Choong-Won (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
  • 투고 : 2011.02.23
  • 심사 : 2011.08.09
  • 발행 : 2011.10.01
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초록

본 연구의 목적은 원형과 타원형 노즐에 발생되는 캐비테이션 유동에 대해 수치 계산을 통해 각각의 특성을 파악하는 것이다. 수치해석을 위해 상용코드인 FLUENT 6.2 을 사용하였고, 실험결과의 캐비테이션 형태와 수치계산에서 얻은 결과를 비교함으로써 계산결과의 타당성을 확인하였다. 주목할만한 결과로는 원형 노즐 내부의 캐이테이션 형상은 노즐 축방향으로 대칭적인 원통형을 가지는 반면, 타원형 노즐의 경우 장축의 캐이테이션 길이가 단축의 캐이테이션 길이보다 긴 말발굽 (horseshoe) 형태가 관찰되었다. 또한, 타원형 노즐의 경우 오리피스의 반경방향 속도는 오리피스의 장, 단축에서 확연히 다른 분포가 관찰되었다.

The purpose of this study was to investigate the internal nozzle flow and cavitation characteristics numerically in both circular and elliptical nozzles. The program FLUENT 6.2 was used to perform the numerical simulation of the cavitating flow in the nozzles. A comparison was made between the cavitation shapes predicted numerically and those found experimentally in order to validate the numerical solution. This study showed that the cavitation in the circular nozzle had a cylindrical shape that was symmetrical with the nozzle axis. However, the cavitation in the elliptical nozzles had a horseshoe-like shape. In addition, the radial velocity distribution varied between the major and the minor axis planes when the working fluid was flowing into the inlet.

키워드

참고문헌

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피인용 문헌

  1. Correlations of Internal Nozzle Flow in Circular and Elliptical Nozzles with External Flow vol.36, pp.3, 2012, https://doi.org/10.3795/KSME-B.2012.36.3.325