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http://dx.doi.org/10.5139/JKSAS.2004.32.8.118

Effects of Underexpanded Plume in Transonic Region on Longitudinal Stability  

Jung, Suk-Young (국방과학연구소)
Yoon, Sung-Joon (국방과학연구소)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.32, no.8, 2004 , pp. 118-128 More about this Journal
Abstract
Exhaust plume effects on longitudinal aerodynamics of missile were investigated by wind tunnel tests using a solid plume simulator and CFD analyses with both the solid plume and air jet plumes. Approximate plume boundary prediction technique was used to produce the outer shape of the solid plumer and chamber conditions and nozzle shapes of the air jet plumes were determined through plume modeling technique to compensate the difference in thermodynamic properties between air and real plume. From comparisons among turbulence models in case of external flow interaction with the air jet plume, Spalart-Allmaras model turned out to give accurate result and to be less grid-dependent. Effects induced by the plume were evaluated through the computations with Spalart-Allmaras turbulence model and the air jet plume to account for various ratios of chamber and ambient pressure and Reynolds number under the flight test condition.
Keywords
Plume Effect; Plume Simulator; Plume Modeling Technique; Turbulent Flow Analysis; Spalart-Allmaras Turbulence Model(Spalart-Allmaras);
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