Drag reduction of a rapid vehicle in supercavitating flow
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Supercavitation is one of the most attractive technologies to achieve high speed for underwater vehicles. However, the multiphase flow with high-speed around the supercavitating vehicle (SCV) is difficult to simulate accurately. In this paper, we use modified the turbulent viscosity formula in the Standard K-Epsilon (SKE) turbulent model to simulate the supercavitating flow. The numerical results of flow over several typical cavitators are in agreement with the experimental data and theoretical prediction. In the last part, a flying SCV was studied by unsteady numerical simulation. The selected computation setup corresponds to an outdoor supercavitating experiment. Only very limited experimental data was recorded due to the difficulties under the circumstance of high-speed underwater condition. However, the numerical simulation recovers the whole scenario, the results are qualitatively reasonable by comparing to the experimental observations. The drag reduction capacity of supercavitation is evaluated by comparing with a moving vehicle launching at the same speed but without supercavitation. The results show that the supercavitation reduces the drag of the vehicle dramatically.
Abstract
Supercavitation is one of the most attractive technologies to achieve high speed for underwater vehicles. However, the multiphase flow with high-speed around the supercavitating vehicle (SCV) is difficult to simulate accurately. In this paper, we use modified the turbulent viscosity formula in the Standard K-Epsilon (SKE) turbulent model to simulate the supercavitating flow. The numerical results of flow over several typical cavitators are in agreement with the experimental data and theoretical prediction. In the last part, a flying SCV was studied by unsteady numerical simulation. The selected computation setup corresponds to an outdoor supercavitating experiment. Only very limited experimental data was recorded due to the difficulties under the circumstance of high-speed underwater condition. However, the numerical simulation recovers the whole scenario, the results are qualitatively reasonable by comparing to the experimental observations. The drag reduction capacity of supercavitation is evaluated by comparing with a moving vehicle launching at the same speed but without supercavitation. The results show that the supercavitation reduces the drag of the vehicle dramatically.
참고문헌 (29)
- Alyanak, E., "Optimum design of a supercavitating torpedo considering overall size, shape, and structural configuration", Int. J. Solids Struct, 43(3-4), pp.642~657 (2006)
- Arndt, R. E. A., "Cavitation research from an international perspective", 26th Iahr Symposium Hydraulic Machinery and System, 15(Pts 1-7) (2013)
- Arndt, R. E. A., "Control of cavitating flows: a perspective", JSME Int. J. Ser. B-Fluids Therm. Eng, 48(2), pp.334~341 (2005)
- Beaudoin, J. F., "Drag and lift reduction of a 3D bluff body using flaps", Exp. Fluids, 44(4), pp.491~501 (2008)
- Bruneau, C. H., "Modelling and shape optimization of an actuator", Struct. Multidiscip. Optim, 48(6), pp.1143~1151 (2013)
- Bruneau, C. H., "Numerical modelling and passive flow control using porous media", Comput. Fluids, 37(5), pp.488~498 (2008)
- Cameron, P. J. K., "An experiment for the study of free-flying supercavitating projectiles", J. Fluids Eng. Transactions ASME, 133(2) (2011)
- Ceccio, S. L., "Friction drag reduction of external flows with bubble and gas injection", Annu. Rev. Fluid Mech, 42, pp.183~203 (2010)
- Choi, H., "Control of flow over a bluff body. Annual review of fluid mechanics", Palo Alto Annu. Rev, 40, pp.113~139 (2008)
- 최주호, "Boundary Method for Shape Design Sensitivity Analysis in Solving Free-Surface Flow Problems", Journal of Mechanical Science and Technology, 19(12), pp.2231~2244 (2005), 대한기계학회
- Choi, J. H., "Shape optimization of the cavitator for a supercavitating torpedo", Struct. Multidiscip. Optim, 29(2), pp.159~167 (2005)
- Coutier-Delgosha, O., "Numerical prediction of cavitating flow on a two-dimensional symmetrical hydrofoil and comparison to experiments", J. Fluids Eng. Transactions ASME, 129(3), pp.279~292 (2007)
- Dieval, L., "A tracking method for the modeling of attached cavitation", Comptes Rendus De. L Acad. Des. Sci. Ser. Ii Fasc. B-Mecanique, 328(11), pp.809~812 (2000)
- Gao, G. H., "Numerical study on ventilated supercavitation reaction to gas supply rate", Mater. Process. Technol, 418-420, pp.1781~1785 (2012)
- Hrubes, J. D., "High-speed imaging of supercavitating underwater projectiles", Exp. Fluids, 30, pp.57~64 (2001)
- Ito, J., "Lifting-line theory of a supercavitating hydrofoil in two-dimensional shear flow e (Application to partial cavitation)", JSME Int. J. Ser. Therm. Eng, 45(2), pp.287~292 (2002)
- 김선홍, "Integrated dynamics modeling for supercavitating vehicle systems", International Journal of Naval Architecture and Ocean Engineering, 7(2), pp.346~363 (2015), 대한조선학회
- Knapp, R. T., "Cavitation" (1970), McGraw-Hill. Inc
- Kulagin, V. A., "Analysis and calculation of a flow in a supercavitation mixer", Chem. Petroleum Eng, 38(3-4), pp.207~211 (2002)
- Likhachev, D. S., "Numerical study of the characteristics of supercavitation on a cone in a stationary evaporator", Desalination Water Treat, 52(37-39), pp.7053~7064 (2014)
- Nouri, N. M., "An iterative scheme for two-dimensional supercavitating flow", Ocean. Eng, 36(9-10), pp.708~715 (2009)
- Pan, S. L., "Natural supercavitation characteristic simulation of small-caliber projectile", Mater. Sci. Civ. Eng. Archit. Sci. Mech. Eng. Manuf. Technol, 488-489, pp.1243~1247 (2014)
- Cavitation and Pressure Distribution, Head Forms at Zero Angle of Yaw, "Rouse, H.", Iowa Institute of Hydraulic Research, State Univ. of Iowa, ~ (1948)
- Seif, M. S., "Drag force on a flat plate in cavitating flows", Pol. Marit. Res, 16(3), pp.18~25 (2009)
- Singhal, A. K., "Mathematical basis and validation of the full cavitation model", J. Fluids Eng. Transactions ASME, 124(3), pp.617~624 (2002)
- Tulin, M. P., "On the shape and dimensions of three-dimensional cavities in supercavitating flows", Appl. Sci. Res, 58(1-4), pp.51~61 (1998)
- Xiong, Y. L., "Drag enhancement and drag reduction in viscoelastic fluid flow around a cylinder", EPL, 91(6) (2010)
- Xiong, Y. L., "A numerical study of two dimensional flows past a bluff body for dilute polymer solutions", J. Newt. Fluid Mech, 196, pp.8~26 (2013)
- Yi, W. J., "Investigations on the drag reduction of high-speed natural supercavitation bodies", Mod. Phys. Lett. B, 23(3), pp.405~408 (2009)