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2012 | 19 | 4 |

Tytuł artykułu

Research on hydrodynamic properties of annular cavitator with water injection

Warianty tytułu

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 ~ ε 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

Wydawca

-

Rocznik

Tom

19

Numer

4

Opis fizyczny

p.11-14,fig.,ref.

Twórcy

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

Bibliografia

  • 1. Savchenko Y.N.: Supercavitation – problems and perspectives. In: CAV2001.; 2002.
  • 2. Ashley S.: Warp Drive Underwater. Scientific American Special Online Issue, 2002.
  • 3. Stinebring D.R., Cook R.B., Dzielski J.E., Kunz R.F.: High-Speed Supercavitating Vehicles. In: AIAA Guidance, Navigation, and Control Conference and Exhibit. Keystone, Colorado, USA; 2006.
  • 4. Kam W.N.: Overview of the ONR Supercavitating High-Speed Bodies Program. In: AIAA Guidance, Navigation, and Control Conference and Exhibit. Keystone, Colorado, USA; 2006.
  • 5. Garabedian P.R.: The principle of independence of the cavity section expansion(Logvinovich's principle) as the basis for investigation on cavitation flows. In: RTO/NATO Lecture Series 005 Supercavitating Flows. France; 2002.
  • 6. Logvinovich G.V.: Hydrodynamics of flows with free boundaries: Halsted Press; 1973.
  • 7. Savchenko Y.N.: Experimental investigation of supercavitating motion of bodies. In: RTO/NATO Lecture Series 005 Supercavitating Flows. France; 2002.
  • 8. Semenenko V.N.: Artificial supercavitation. physics and calculation. In: RTO/NATO Lecture Series 005 Supercavitating Flows. France; 2002.
  • 9. Sedov L.I.: Mechanics of Continuum. Moscow: Nauka Publishing House; 1976.
  • 10. Owis F.M., Nayfeh A.H.: A compressible multi-phase flow solver for the computation of the supercavitation over high-speed torpedo. In: 40th A1AA Aerospace Sciences Meeting & Exhibit. Reno, NV, US; 2002.
  • 11. Owis F.M., Nayfeh A.H.: Numerical simulation of super- and partially-cavitating flows over an axisymmetric projectile. In: 39th AIAA Aerospace Sciences Meeting & Exhibit. Reno, NV, US; 2001.
  • 12. Kinzel M.P., Lindau J.W., Kunz R.F.: Free-surface proximity effects in developed and super-cavitation. In: DoD HPCMP Users Group Conference, 2008.
  • 13. Seif M.S., Asnaghi A., Jahanbakhsh E.: Drag force on a flat plate in cavitating flows. Polish Maritime Research, 2009.
  • 14. Kuklinski R., Fredette A., Henoch C., Castano J.: Experimental Studies in the Control of Cavitating Bodies. In: Guidance, Navigation, and Control Conference and Exhibit. Keystone, Colorado, USA: AIAA; 2006.
  • 15. Choi J.H., Penmetsa R.C., Grandhi R.V.: Shape Optimization of the Cavitator for a Supercavitating Torpedo. Struct Multidisc Optim, 2005.
  • 16. Shafaghat R., Hosseinalipour S.M.: Shape Optimization of Two-Dimensional Cavitators in Supercavitating Flows, Using NSGA II Algorithm. Appl. Ocean Res., 2008.
  • 17. Lin M., Hu F., Zhang W.: Optimal Design of Conical Cavitator of Supercavitating Vehicles. Journal of National University of Defense Technology, 2010.
  • 18. Savchenko Y.N.: Supercavitating object propulsion. In: RTO/NATO Lecture Series 005 Supercavitating Flows. France; 2002.
  • 19. Miller T.F., Herr J.D.: Green Rocket Propulsion by Reaction of Al and Mg Powders and Water. In: 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Fort Lauderdale, Florida; 2004.

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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