排油煙機蝸型流道改善與噪音模擬

Numerical Simulation of The Noise and Spiral Flow channel Improvements of Range Hood

丁啟紘(Chi-Hong Ding)

指導教授 ： 吳文忠

國立虎尾科技大學/工程學院/航空與電子科技研究所/碩士(2013年)

https://doi.org/10.6827/NFU.2013.00098

摘要

排油煙機在生活中已成為不可或缺的必需品，每個家庭及餐廳廚房都可以見到，是目前可以將烹飪時所產生之油煙及廢熱排放出去的主要方法，但一般家用之排油煙機設計還有很大的改善空間，為達到排油煙機整體效能之提升及輕量化目標，可以從內部流道的改良、調整風扇與入風口之間隙等方式著手。
本研究使用CFD套裝軟體Fluent針對單馬達雙入口排油煙機進行數值模擬，利用可視化的模擬結果，分析流場內部之物理變化，並根據其缺失加以改善，為使本研究不失其準確性，分析出來的結果會與實驗值做比較，在間隙部分，分別測試不同入風口與風扇之間隙，並評估其PQ性能曲線，找出最佳之距離，蝸型流道改良方面，首先於出風口處增加一擋板及導流板防止流體回流至風扇，並減少渦流的情況發生，其次分析三種螺旋線外型之排油煙機出風口流量，找出最佳之蝸型流道外型，以期望達到提高性能之目的。

關鍵詞：排油煙機、流道、螺旋線

關鍵字

排油煙機 ； 流道 ； 螺旋線

並列摘要

Rnge hoods has become an indispensable necessity in life. Every family and every restaurant kitchen can be seen it. The range hood is the current main method to emitted fumes and waste heat from cooking. But this is still much room for improvement. In order to achieve the goal of lightweight and performance improvement. We can begin from reform interior flow channel and regulate the gap between fan and inlet.
The CFD “Fluent” is applied to the flow pattern of two range hood. This research is enhance the aerodynamic performance of range hood by taking advantage of the CFD calculations to visualize the flow patters inside this device. Without losing its accuracy for this study. The numerical results will be compared with the experimental values. At first, test difference gap between fan and inlet then assessment of the PQ performance curve. Increase the outlet baffle and deflector to prevent fluid flow back to the fan and reduce eddy happens. Analysis of three spiral shape range hood outlet flow, to identify the best of the snail-shaped flow channel shape, expect to achieve the purpose of improving performance.

Keyword：Range hood, Flow channel, spiral

並列關鍵字

Range hood ； Flow channel ； spiral

參考文獻

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