垂直指數(shù)延伸板駐點混合對流與傳熱研究
發(fā)布時間:2018-11-15 15:02
【摘要】:研究不可壓縮粘性流體在垂直指數(shù)延伸壁面上的二維駐點混合對流與傳熱問題,借助相似變換將邊界層控制方程轉(zhuǎn)換為非線性常微分方程,通過打靶法對其進(jìn)行數(shù)值計算,用圖表詳細(xì)分析順流和逆流時浮力參數(shù)λ和Prandtl數(shù)Pr對流體流動和傳熱特性的影響.結(jié)果顯示:順流時,表面摩擦系數(shù)和Nusselt數(shù)均隨浮力參數(shù)λ的增大而增大;隨著Pr數(shù)增大,Nusselt數(shù)增大而表面摩擦系數(shù)減小.逆流時,表面摩擦系數(shù)和Nusselt數(shù)均隨浮力參數(shù)λ的增大而減小,隨Pr增大而增大.
[Abstract]:The mixed convection and heat transfer problem of incompressible viscous fluid on the vertical exponentially extended wall is studied. The boundary layer control equation is transformed into nonlinear ordinary differential equation by similar transformation and the numerical calculation is carried out by shooting method. The effects of buoyancy parameters 位 and Prandtl number Pr on the flow and heat transfer characteristics of the fluid are analyzed in detail in this paper. The results show that the surface friction coefficient and the Nusselt number increase with the increase of the buoyancy parameter 位, while the Nusselt number increases and the surface friction coefficient decreases with the increase of the Pr number. The surface friction coefficient and Nusselt number decrease with the increase of buoyancy parameter 位 and increase with the increase of Pr.
【作者單位】: 福建船政交通職業(yè)學(xué)院汽車運(yùn)用工程系;福州大學(xué)機(jī)械工程及自動化學(xué)院;
【基金】:2012年度中央財政支持地方高校發(fā)展專項資金資助項目(閩教財[2012]788號)
【分類號】:O357.1
[Abstract]:The mixed convection and heat transfer problem of incompressible viscous fluid on the vertical exponentially extended wall is studied. The boundary layer control equation is transformed into nonlinear ordinary differential equation by similar transformation and the numerical calculation is carried out by shooting method. The effects of buoyancy parameters 位 and Prandtl number Pr on the flow and heat transfer characteristics of the fluid are analyzed in detail in this paper. The results show that the surface friction coefficient and the Nusselt number increase with the increase of the buoyancy parameter 位, while the Nusselt number increases and the surface friction coefficient decreases with the increase of the Pr number. The surface friction coefficient and Nusselt number decrease with the increase of buoyancy parameter 位 and increase with the increase of Pr.
【作者單位】: 福建船政交通職業(yè)學(xué)院汽車運(yùn)用工程系;福州大學(xué)機(jī)械工程及自動化學(xué)院;
【基金】:2012年度中央財政支持地方高校發(fā)展專項資金資助項目(閩教財[2012]788號)
【分類號】:O357.1
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