벽면효과를 받는 2차원 쐐기형 몰수체의 공동 유동에 대한 수치해석
Numerical Analysis of Cavitating Flow around Two-dimensional Wedge-shaped Submerged Bodies under the Wall Effect
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In practice, cavitation phenomena occur in unbounded flows. However, the wall effect is unavoidable during experiments at a closed section such as a cavitation tunnel. Especially, supercavity generated behind a cavitator is relatively large and thick, so that geometric and dynamic characteristics of the cavity are affected by the tunnel wall. In order to apply experimental results into the unbounded flow field, physical correlations are necessary. In this paper, we proposed an image method based on a potential flow to simulate the wall effect. Considering two-dimensional wedge-shaped bodies, configurations and drag characteristics of the cavity were examined according to the distance ratio to the wall surface. The results were compared and verified with existing theoretical and experimental results.
Abstract
In practice, cavitation phenomena occur in unbounded flows. However, the wall effect is unavoidable during experiments at a closed section such as a cavitation tunnel. Especially, supercavity generated behind a cavitator is relatively large and thick, so that geometric and dynamic characteristics of the cavity are affected by the tunnel wall. In order to apply experimental results into the unbounded flow field, physical correlations are necessary. In this paper, we proposed an image method based on a potential flow to simulate the wall effect. Considering two-dimensional wedge-shaped bodies, configurations and drag characteristics of the cavity were examined according to the distance ratio to the wall surface. The results were compared and verified with existing theoretical and experimental results.
참고문헌 (10)
- 안병권, "Experimental and numerical studies on super-cavitating flow of axisymmetric cavitators", International Journal of Naval Architecture and Ocean Engineering, 2(1), pp.39~44 (2010), 대한조선학회
- 안병권, "Experimental investigation of supercavitating flows", International Journal of Naval Architecture and Ocean Engineering, 4(2), pp.123~131 (2012), 대한조선학회
- Birkhoff, G., "Wall effects in cavity flow", Quarterly of Applied Mathmatics, 9(2), pp.151~168 (1950)
- Birkhoff, G., "Jets, wakes and cavities" (1957), Academic Press
- Brennen, C., "A numerical solution of axisymmetric cavity flows", Journal of Fluid Mechanics, 37(4), pp.671~688 (1969)
- 정소원, "2차원 쐐기형 제어핀 후류의 공동유동 특성에 대한 실험연구", 대한조선학회 논문집, 53(3), pp.180~187 (2016), 대한조선학회
- Karlikov, V.P, "Method of approximate account for the wall effect in cavitation flow around bodies in water tunnels", Fluid Dynamics, 1(4), pp.89~93 (1966)
- 김지혜, "3차원 축대칭 캐비테이터의 초월공동유동 수치해석", 대한조선학회 논문집, 50(3), pp.160~166 (2013), 대한조선학회
- 김지혜, "축대칭 캐비테이터에서 발생하는 자연 초월공동과 항력 특성에 대한 연구", 대한조선학회 논문집, 53(6), pp.465~472 (2016), 대한조선학회
- Wu, T.Y, "Cavity-flow wall effects and correction rules", Journal or Fluid Mechanics, 49(2), pp.223~256 (1971)