- 作者: 陳家威
- 作者服務機構: 清華大學
- 中文摘要: 一種新的計算方法適用於計算不規則形狀管道,在各流速範圍的切應力流速分佈與阻力係數。在層流時,因為所用的應力分佈為近似值所以距壁較遠的地方流速與解方程式所得值稍有差別,其他地方與流速增大後計算值與實驗值和正確層流流速比較都無甚差別。阻力係數則在各流速範圍與正確值或實驗值比較都無差別。
- 英文摘要: A continuous velocity distribution and friction factors are derived whichis based on a modification of shear stress distribution for all flow regimes(laminar, transitional, and turbulent)·Slight discripency shows for the la-minar velocity far away from wall due to the approximate nature of theshear stress distribution. In general, the calculated results agree well withexperiments for data in non-circular conduits. It is believed that this pro-posed method represents an accurate semi-theoretical calculation of friction-al resistance confficients for all regimes of flow for equilateral triangle,square conduit, and three-point-star conduit and possibly for other non-circular channels.
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