本文主要根據Yanaoka (2002)所發表的層流流過方管內鈍頭平板之的數值計算擴展成紊流的數值計算並採用Djilali (1991)實驗數據來分析穩態、二維、紊流流場與熱傳的數值模擬以驗證理論模式之可行性。本文紊流統御方程式乃是以控制體積法為基礎，配合有限差分法及冪次法則來離散成差分方程式。對於紊流的結構則是以 紊流模式配合牆函數來描述。以 SIMPLE 運算法則求解壓力-速度結合的問題。
本文研究的參數為雷諾數(Re = 6870、11700、17900)、固體形狀比BR (BR = 0.1、0.15)以及鈍頭平板的表面温度(Ts = 343K、353K、363K)。數值模擬結果顯示，在所研究的雷諾數範圍內，再接觸點長度的預測值與實驗值誤差在10 ％內，再接觸點長度隨著雷諾數的增加而增加。在迴流區內的流場形成三維的特性，本文所預測的平均流場與實驗值相當吻合。當雷諾數增加，在側壁(side wall)附近的渦漩漸向下游移動，此渦漩結構對於熱傳有主要的影響。

This study presents the Numerical Simulation of Turbulent Flow and Heat Transfer Over a Blunt Flat Plate in a Channel, based on the experiment results of Djilali (1991) and extension of the laminar flow calculation of Yanaoka (2002) to the turbulent flow. The numerical simulation of steady, two-dimensional, turbulent flow and heat transfer is adopted to test the accuracy of the theoretical model. The turbulent-governing equations are resolved by a Control-Volume based finite-difference method with power-law scheme, and the well-known turbulence model and its associate wall function to describe the turbulent structure. The SIMPLE algorithm is adopted to solve the pressure – velocity coupling.
The parameters studied include the Reynolds number (Re = 6870, 11700, 17900), Solid blockage ratio BR (BR = 0.1, 0.15) and surface temperature of blunt flat plate (Ts = 343K、353K、363K). The numerical calculations indicate that reattachment length Xr increases with an increase of Reynolds number in the range studied of Reynolds number, the error of the reattachment length is with in 10 ％ comparing with the experimental results. The flow in the recirculation region becomes three–dimensional characteristics. The predicted mean flow field is found to be in good agreement with wall grows to the downstream with an increase of Reynolds number. This vortex structure has great effects upon heat transfer.

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