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《Engineering Mechanics》 2007-02
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NUMERICAL SIMULATION AND COMPARISON ON DRAG REDUCTION OF NON-STREAMLINE SUBMERGED BODY

*LIU Yu-qiu , YU Kai-ping , ZHANG Jia-zhong (School of Astronautics, Harbin Institute of Technology, Harbin 150001, China)  
Taking a non-streamline submerged body as a model, its drags under the natural condition and artificial ventilated condition are numerically simulated using mixed homogeneous flow theory and realizable κ - ε turbulence model. Numerical simulation of a streamline body’s drag with the above method is compared with approximate formula calculation and the applicability of numerical method is verified. The regulations of the drags of non-streamline submerged body under the natural condition and artificial ventilated condition are found. The result shows that the drag of non-streamline submerged body under natural condition is greatly increased compared with that of streamline body, and the pressure drag is the main component. However, after artificial ventilation and the supercavity is formed, the drag is greatly decreased. The viscous drag can be ignored when the cavity number is small enough.
【CateGory Index】: U661.1
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【References】
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【Co-references】
Chinese Journal Full-text Database 10 Hits
1 ZHANG Bo,WANG Guo-yu,ZHANG Shu-li,YU Zhi-yi(School of Mechanical and Vehicular Engineering,Beijing Institute of Technology,Beijing 100081,China);Evaluation of a Modified RNG κ-ε Model for Computations of Cloud Cavitating Flows[J];Transactions of Beijing Institute of Technology;2008-12
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3 YUAN Xu-long, ZHANG Yu-wen, YANG Wu-gang (College of Marine, NPU, Shaanxi Xi'an 710072, China);Multi-phase CFD Analysis of Typical Cavitator for High-Speed Supercavitating Underwater Vehicle[J];Journal of Projectiles.Rockets.Missiles and Guidance;2005-01
4 WANG Hai-bin,ZHANG Jia-zhong,WANG Cong,WEI Ying-jie,JIA Li-ping(School of Astronautics,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China);NUMERICAL SIMULATION OF ACCELERATION EFFECT ON NATURAL SUPERCAVITY[J];Engineering Mechanics;2007-01
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7 HUANG Dian-Gui (Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China);A NEW PRECONDITIONING TECHNOLOGY FOR FLUID DYNAMICS[J];Journal of Engineering Thermophysics;2005-04
8 WANG Guo-Yu WU Jiong-Yang LI Xiang-Bin Wei Shyy HAN Zhan-Zhong ZHANG Min-Di (School of Mechanics and Vehicle Engineering,Beijing Institute of Technology, Beijing 100081, China; Department of Mechanics and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, U.S.A.);NUMERICAL COMPUTING MODEL AND VERIFYING FOR CAVITATING TURBULENT FLOWS[J];Journal of Engineering Thermophysics;2005-06
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