Research on hydrodynamic properties of annular cavitator with water injection

• Autorzy: Zhenyu Jiang Zhenyu , Min Xiang Min , Mingdong Lin Mingdong , Weihua Zhang Weihua , Shuai Zhang Shuai
• Języki publikacji: EN

Abstrakty

EN

Annular cavitator with water injection is one of the key parts of the long-range supercavitating vehicle powered by water ramjet. In this paper, hydrodynamic properties of annular cavitator are studied numerically. The standard k ~ ĺ turbulence model is coupled with the Reynolds Averaged Navier-Stokes (RANS) equations to model the natural supercavitation process. The multiphase flow is considered as a mixture of varying density and modeled by the mass exchange equations. To fully understand this process, numerical simulations were performed for different annular cavitators. Computational Fluid Dynamics (CFD) results, including the pressure distribution and forces acting on the cavitator surface, mass flow and pressure loss of water injection, various supercavity sizes, were obtained and analyzed. The pressure distribution on the cavitator surface was significantly changed which resulted in 4 ~ 6% increase of the total drag of the vehicle. The results show that the mass flow and velocity of the injection water is mainly dependent on the tube size, while the total pressure loss of the water injection is mostly related to the outlet pressure. Supercavity generated by annular cavitator is smaller than that of the discal one. Based on the correlation analysis of the supercavity size and other factors, it could be concluded that the contraction of the cavity size is mainly caused by the diffluent mass flow of the water injection.

Słowa kluczowe

EN

computational fluid dynamics (CFD); annular cavitator; water injection

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2012
• Tom: nr 4
• Strony: 11--14
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Zhenyu Jiang Zhenyu

autor

Min Xiang Min

autor

Mingdong Lin Mingdong

autor

Weihua Zhang Weihua

autor

Shuai Zhang Shuai

• Team 6, College of Aerospace Science and Technology National University of Defense Technology Changsha, P.R. China, 410073,

Bibliografia

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