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- W1858007860 abstract "초음속 흡입구의 부가항력을 계산하는 효율적인 방법을 개발하였으며 이 방법은 상용 유동 해석 소프트웨어인 STAR-CCM+을 사용한 유동 해석 결과를 이용한다. STAR-CCM+는 다면체 형상의 격자를 이용하여 효율적인 3차원 유동 해석을 수행할 수 있다. 세 가지 형상의 흡입구에 대해 두 가지의 유동 마하수와 여러 유량비 조건에 대한 해석을 수행하고 본 방법을 이용하여 부가항력을 계산하였으며 계산 결과를 풍동시험 결과와 비교하여 잘 일치하는 결과를 얻었다. 초임계 조건에 대한 초음속 흡입구 주위의 3차원 유동 해석은 비점성 가정을 사용하고 있지만, 점성 효과를 제외한 것이 부가항력 산출에 큰 영향을 주지 않은 것으로 사료되며 적은 격자와 단순한 경계조건의 사용이 가능하여 격자 생성과 유동 해석에 소요되는 노력과 시간의 절약으로 인해 효율적인 부가항력 산출에 기여했다고 판단된다. A technique for calculating the additive drag of the inlet in supersonic flow was studied using commercial CFD software, STAR-CCM+, which provides a efficient way of 3 dimensional flow analysis with polyhedron-shaped grid system. Three configurations were chosen and applied to the calculation with various flow conditions of two different free stream Mach No. and some mass flow ratios. Comparisons with results from wind tunnel test gave good agreements. Though computation were carried out with the inviscid and compressible flow around the supersonic inlet for the supercritical condition, ignoring the viscous effects is concluded to give little effects on the accuracy of the additive drag calculation and to make the calculation more efficient owing to less effort and time consumed for grid system build-up and for iteration because of less grid number and simpler boundary condition." @default.
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- W1858007860 date "2015-05-01" @default.
- W1858007860 modified "2023-09-25" @default.
- W1858007860 title "Additive Drag Computation of Supersonic Inlet by Numerical Analysis on Inviscid Flow" @default.
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- W1858007860 doi "https://doi.org/10.5139/jksas.2015.43.5.387" @default.
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