한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
권호 표지

초음속 난류 유동장내의 발사체 후방 동체형상에 따른 기저유동의 수치적 계산

Numerical study of base flow of afterbodies for launch vehicle in supersonic turbulent flow

  • 박남은 (조선대학교 대학원 항공우주공학과) ;
  • 노형운 (조선대학교 항공우주공학과) ;
  • 김재수 (조선대학교 항공우주공학과)
  • 발행 : 2002.12.01
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초록

The projectile afterbodies for zero-lift drag reduction has been analyzed using the Navier-Stokes equations with the κ-εturbidence model. The numerical method of a second order upwind scheme has been used on an unstructured adaptive grid system. Base drag reduction methods that have been found effective on axisymmetric bodies are boattailing, base bleed, base combustion, locked vortex afterbodies and multistep afterbodies. In this paper, turbulence flow and pressure charateristics have been studied for geometries of multistep afterbodies. The important geometrical and flow parameters relevant to the design of such afterbodies have been identified by step number, length and height. The flow over multistep aftoerbodies or base have many kinds of compressible flow characteristics including expansion waves at the trailing edge, recompression waves, separation and recirculating flow in the base region, shear flow and wake flow. The numerical results have been compared and analyzed with the experimental data. The flow characteristics have been clearly shown.

키워드

참고문헌

  1. Sahu, J., Nietubicz, CJ., and Steger, J.L.,'Navier-Stokes Computations of ProjectileBase Flow With and Without BaseInjection', AIAA Journal, Vol. 23, No. 9,(1985), pp.1348
  2. Sahu, J., 'Numerical Computations ofSupersonic Base Flow with SpecialEmphasis on Turbulence Modeling', AIAAJ. Vol. 32, No. 7, (1994)
  3. 김민환, 박승오,'2-방정식 및 레이놀즈 응릭모형을 이용한 초음속 난류 기저유동의 수치적 계산', 한국전산유체공학회지 제2권 제2호,(1997), pp.9
  4. Viswanath, P.R., 'Drag Reduction ofAfterbodies by Controlled Seperated Flows',AIAA, J. Vol 39, No. 1, (2001), pp.73
  5. Herrin, J.L. and Dutton, J.C., 'AnExperimental Investigation of the SupersonicAxisymmetric Base Flow Behind a Cylindrical Afterbody, Univ. of Illinois aturbana-Champaign, UILU 91-4004, Urbana,IL, (1991)
  6. Chuang, C. and Chieng, C., 'SupersonicBase Flow Computation Using Hieher OrderClosure Turbulence Models,' AIAAPaper96-0566, (1996)
  7. 김재수, 박남은, '비정렬적응격자론 이용한 유한쐐기 덴 원추 주위의 초음속 난류유동에 관한 수치적 연구', 한국항공우주학회, 제29권제4호, (2001), p.36
  8. Hoffmann, K.C. and Chiane S.T.,'Computational Fluid Dynamics forEngineers', Engineering Education SystemUSA, (1993)
  9. 김재수., '초음속 불완전 팽창 난류 제트 유동에 관한 수치적 연구' , 한국전산유체공학회지제4권 제2호(통권 제7호), (1999), p.57
  10. Jones, W.P. and Launder, B.E., ' ThePrediction of Laminarization with a TwoEquation Model of Turbulence,' Int. Journalod Heat and Mass Transfer, vol. 15, no.2 ,(1972), p.301
  11. Einfeldt, B., 'On Godunov-Type Methodsfor Gas Dynamics', SIAM J. Anal. Vol. 25,No. 2, (1988), p.294
  12. 고성모, '비정렬적응사변형격자의 고해상도기법을 사용한 비정상 충격파 연구', 박사학위논문, 한국파학기술원, (1997)
  13. Hirsch, C., 'Numerical Computation ofInternal and External Flows', John Wiley &Sons, (1989), p.501