Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)

  • 2008.03a
  • /
  • Pages.761-770
  • /
  • 2008
  • /
  • 1975-342X(pISSN)
The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지

NAVIER STOKES COMPUTATIONS ON A TWIN ENGINE NOZZLE-AFTERBODY

  • Gogoi, A. (Aeronautical Development Agency) ;
  • Sundaramoorthi, S. (Aeronautical Development Agency)
  • Published : 2008.03.30
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Abstract

The report presents turbulent Navier Stokes computations on twin engine afterbody model with jet exhaust. The computations are carried out for free-stream Mach number of 0.8 to 1.20 and jet pressure ratio of 3.4 to 7.8. The Spalart-Allmaras turbulence model is used in the computations. Comparison is made with experimental data and Cp distribution around the afterbody is found to agree well with experiments. Flow features of the exhaust jet like under expansion, over expansion, Mach discs, etc are well captured. The effect of nozzle pressure ratio and flight Mach number are studied in detail. These computations serve as validation of the in-house code for twin jet afterbody.

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