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http://dx.doi.org/10.3795/KSME-B.2015.39.12.913

Numerical Analysis for Drag Force of Underwater Vehicle with Exhaust Injected inside Supercavitation Cavity  

Yoo, Sang Won (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Lee, Woo Keun (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Kim, Tea Soon (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Kwack, Young Kyun (Korea Atomic Energy Research Institute)
Ko, Sung Ho (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.12, 2015 , pp. 913-919 More about this Journal
Abstract
A supercavitating vehicle has a speed of more than 300 km/h in water. A numerical analysis of the flow around a supercavitating vehicle must deal with a multiphase flow consisting of the water, vapor and exhaust gas because the vehicle is powered by roket propulsion. The effect of the exhaust gas on the vehicle is an important part in the study of the performance of the supercavitating vehicle. In the present study, the effect of the exhaust gas on the drag of vehicle was investigated by conducting numerical analysis. When there is no exhaust gas, drag of vehicle is affected by re-entrant. In the case with rocket propulsion, the exhaust gas reduces the influence of re-entrant. The exhaust gas also creates Mach disk and it changes drag profile.
Keywords
Drag Coefficient; Exhaust Gas; Underwater Vehicle; Rocket Propulsion; Supercavitation;
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