Experimental and numerical studies on super-cavitating flow of axisymmetric cavitators
2
조회
0
다운로드
18
인용
0
참고문헌
초록
Recently underwater systems moving at high speed such as a super-cavitating torpedo have been studied for their practical advantage of the dramatic drag reduction. In this study we are focusing our attention on super-cavitating flows around axisymmetric cavitators. A numerical method based on inviscid flow is developed and the results for several shapes of the cavitator are presented. First using a potential based boundary element method, we find the shape of the cavitator yielding a sufficiently large enough cavity to surround the body. Second, numerical predictions of supercavity are validated by comparing with experimental observations carried out in a high speed cavitation tunnel at Chungnam National University (CNU CT).
Abstract
Recently underwater systems moving at high speed such as a super-cavitating torpedo have been studied for their practical advantage of the dramatic drag reduction. In this study we are focusing our attention on super-cavitating flows around axisymmetric cavitators. A numerical method based on inviscid flow is developed and the results for several shapes of the cavitator are presented. First using a potential based boundary element method, we find the shape of the cavitator yielding a sufficiently large enough cavity to surround the body. Second, numerical predictions of supercavity are validated by comparing with experimental observations carried out in a high speed cavitation tunnel at Chungnam National University (CNU CT).
참고문헌 (9)
- Alyanak, E, "Variable shape cavitator design for a supercavitating torpedo", Proc. of 10th AIAA, 2004, ~
- Kirschner, I.N, "Supercavitating projectiles in axisymmetric subsonic liquid flows", American Society of Mechanical Engineers, Fluids Engineering Division, 210, pp.75~93 (1995)
- Cavitation with Finite Cavitatin Number, Admitalty Res, "Kreisel, G", ~, pp.Rept. No. R1H (1946), 36
- Kunz, R.F, "Multi-Phase CFD Analysis of natural and ventilated cavitation about submerged bodies", Proceedings of FEDSM 9, 3rd ASME, 1999, ~
- LEE, C.-S., "A potential based panel method for the analysis of a 2-dimensinal cavitating hydrofoil", College of Egnineering, ~ (1989)
- Newman, J.N., "Marine Hydrodynamics" (1977), The MIT Press
- Uhlman, J.S, "The surface singularity or boundary intergral method applied to supercavitating hydrofoils", J. of Ship Research, 33, pp.16~20 (1989)
- Wu, T.Y., "Cavity and wake flow", Annual Review of Fluid Mechanics, 4, pp.243~284 (1972)
- Yang, C, "Benchmark analysis of a series of propellers with a panel method", Proc. of SNAME propeller 1988 Symp.,, pp.1~10 (1988)