本論文研究的主題是利用數值方法模擬馬達的外流場以及計算馬達風扇轉動時所產生的流量，並與實驗結果互相比較驗證。首先對簡化馬達進行數值模擬，再將其結果與實驗互相比較，使所得之結果達到吻合範圍內，逐步驗證至真實馬達問題。 本論文研究的動機是由於馬達之流量與溫升雖可藉由實驗量測得到結果，但每當更改馬達內部元件的尺寸時，又需要重新開模鑄造，耗費許多時間與成本。因此若能以數值方法對馬達的外流場進行模擬，只要在數值模型中修改其參數設定便能得到所需之結果，如此一來，就可以節省大量的時間與成本。 藉由簡化馬達的網格建構方式與邊界條件之設定，進而瞭解在模擬真實馬達外流場的時候，應如何建構好的網格品質和設定正確的邊界條件都會影響到所得到的解。 本論文經由一系列簡化封閉式馬達、開放外氣馬達、開放外氣馬達加四根散熱鰭片、開放外氣馬達加二十四根散熱鰭片以及真實馬達之實驗量測與數值模擬，循序漸進建立一套有系統的驗證程序藉由處理簡化馬達的過程中，瞭解數值與實驗不確定之因素，以建立良好的驗證規範。 The theme of research in this thesis is the motor external flow simulations with numerical method and calculation the flow rate then relatively prove each other with the experimental result. Carry on the numerical simulation in simplifying the motor at first, compare its result with the experiment of each other again, if the result of income within the range of acceptable, the step is verified to the true motor according to this. The motive of research in this thesis is because the flow rate and temperature rise of the motor can receiving the result with the experiment measure, but whenever alter the size of the component within the motor need to make the mould to cast again, really consume a lot of time and cost. So if can make good use of motor external flow simulations with numerical method, as long as revise its parameter in the computer that can receive the result, it can save a large amount of time and cost. Build the grid which constructs the way and define boundary condition by the simplifies motor, to understand when the true motor external flow simulations, how build it construct by good grid quality and define correct boundary condition it will be influencing solve. This thesis passes a series of simple internal flow motor、simple external flow motor、external flow motor and add four fins of heat dissipation、external flow motor and add twenty-four fins of heat dissipation with numerical simulation and experiment measure and true motor external flow, follow in order and advance step by step to establish a set of systematic verification procedure and by dealing with the course of simplifying motor, solve the uncertain factor with numerical and experiment, in order to set up good verification and validation norm.
