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首頁> 外文期刊>International Journal of Computational Fluid Dynamics >Large-eddy simulation of curved-geometry flows using contravariant components of velocity
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Large-eddy simulation of curved-geometry flows using contravariant components of velocity

機(jī)譯：利用速度的反分量對彎曲幾何流動進(jìn)行大渦模擬

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The current large-eddy simulation (LES) research makes use of the contravariant components as the dependent variables on a staggered grid system for the discretisation of the governing equations in curvilinear coordinates. This technology provides a possibility to investigate efficiently turbulent flows in complex geometries. To test and validate the recently developed in-house LES code, LESSGA (Large-Eddy Simulation on a Staggered Grid Arrangement), numerical simulations were performed for turbulent flows in a concentric annular pipe and transitional flows past an airfoil. In this article, the computed results of flows in a concentric annular pipe with a radius ratio of a? =? R inner/Router? =? 0.5 at and flows past an SD7003 airfoil at Rec? =? 60,000 and angle of attack ?±? =? 4?° are compared with available experimental and DNS data. Technical difficulties experienced are also discussed.View full textDownload full textKeywordslarge-eddy simulation, annular pipe flow, curved-geometry flow, contravariant velocityRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10618562.2010.545773
機(jī)譯：當(dāng)前的大渦模擬（LES）研究利用交錯分量作為交錯網(wǎng)格系統(tǒng)上的因變量，以便在曲線坐標(biāo)系中離散化控制方程。這項(xiàng)技術(shù)為研究復(fù)雜幾何形狀中的湍流提供了可能。為了測試和驗(yàn)證最近開發(fā)的內(nèi)部LES代碼LESSGA（交錯網(wǎng)格布置上的大渦模擬），對同心環(huán)形管道中的湍流和經(jīng)過機(jī)翼的過渡流進(jìn)行了數(shù)值模擬。在本文中，在半徑為a = R inner / R outer = 0.5的同心環(huán)形管道中流動的計算結(jié)果在在Re c 處的SD7003翼型= 60,000，迎角α= 4°與可用的實(shí)驗(yàn)數(shù)據(jù)和DNS數(shù)據(jù)進(jìn)行了比較。還討論了遇到的技術(shù)難題。查看全文下載全文關(guān)鍵字大渦流模擬，環(huán)形管道流量，彎曲幾何形狀流量，恒定速度相關(guān)var addthis_config = {ui_cobrand：“泰勒和弗朗西斯在線”，service_compact：“ citeulike，netvibes，twitter，technorati ，delicious，linkedin，facebook，stumbleupon，digg，google，more“，發(fā)布編號：” ra-4dff56cd6bb1830b“};添加到候選列表鏈接永久鏈接http://dx.doi.org/10.1080/10618562.2010.545773

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