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http://dx.doi.org/10.5139/JKSAS.2009.37.10.955

Detached Eddy Simulation of Base Flow in Supersonic Mainstream  

Shin, Jae-Ryul (부산대학교 항공우주공학과 대학원)
Moon, Sung-Young (부산대학교 항공우주공학과 대학원)
Won, Su-Hee (서울대학교 기계항공공학부 대학원, 부산대학교 부품소재산학협력연구소)
Choi, Jeong-Yeol (부산대학교 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.10, 2009 , pp. 955-966 More about this Journal
Abstract
DES method is applied to an axisymmetric base flow at supersonic mainstream. The model is based on the Spalart-Allmaras (S-A) turbulence model in the RANS mode, and is based on the subgrid scale model in the Large-eddy simulation (LES) mode. Accurate predictions of the base flowfield and base pressure are successfully achieved by using the DES methodology which is less expensive than LES. Flow properties at the edge of base, such as boundary layer thickness, momentum thickness and skin fraction are compared with Dutton et al [experimental data to proper prediction of base flowfiled. From the present results, The DES accurately resolves the physics of unsteady turbulent motions, such as shear layer rollup, large-eddy motions in the downstream region and small eddy motions inside the recirculating region. Moreover, The present results of using an empirical constant $C_{DES}$ of 1.2 shows good agreement with experimental data than conventional empirical constant $C_{DES}$ of 0.65.
Keywords
Reynolds-Averaged Navier-Stokes(RANS); Detached Eddy Simulation(DES); Delayed Detached Eddy Simulation(DDES); Base Flow;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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