- 學位論文
單馬達雙進風口排油煙機之流道改善與數值模擬
Numerical Simulation and Flow Channel Improvements of Range Hood Composed of Single Motor with Dual Air Inlet
摘要
排油煙機已是廚房中不可或缺的排煙系統，為使排油煙機更具有市場競爭力，需在降低能源損耗、降低運轉噪音和產品輕量化等方面進行研究與改善。而目前我們一般大眾所使用之排油煙機仍有一些可改善的空間，例如可以透過改良馬達機構跟流道設計的部分，來達到更節省耗材且輕量化之目標。因此為了達到輕量化設計的目標，必須更改有別於以往之雙馬達的設計、排風道的改良以及風扇葉片的設計，將其改為單馬達結構並藉由更改排風路徑改善其排風量以增強吸力。 本研究將透過CFD套裝軟體“Fluent”針對單馬達排油煙機進行數值模擬，並觀察其內部流場之變化，找出流場不順暢之處，進而找出改善內部流道設計之方案。首先將數值模擬數據與實驗數據作比較，並評估PQ性能曲線；其次改變入口通道的位置與間隙，透過Fluent模擬後來觀察其排風量與內部流場之變化，並對此作研究分析與討論，以期達到提高性能之目的。
並列摘要
Range hood is indispensable ventilative equipment in the kitchen. In general, the range hood composed of two electrical motor with dual air inlet. The design tendency of range hood is reduced energy consumption, reduced noise, lighter weight and so on. In order to achieve the goal of lightweight, the single motor is selected in the range hood system. Therefore, the paper aims is a study on flow channel improved of range hood with single motor. The CFD “Fluent” is applied to the flow pattern of range hood. The steady governing equations are solved with standard turbulent model. The advection terms is made by second order upwind scheme. The present of this paper is followed. The first one is to evaluate PQ performance of range hood. The second one is to study effect of flow channel and gap of entrance channel.