FLUENT與FDS用於攝影棚空調性能優化之分析

Abstract

本論文之研究動機係因攝影棚之出風、回風口設計問題造成空調效果不佳，故採用計算流體力學對攝影棚流場做數值模擬，期望藉由改變出風口配置改善攝影棚空調性能。選用計算流體力學軟體FLUENT與火災模擬軟體FDS進行模擬，首先分別使用兩套軟體對台灣科技大學蔡廷亞的室內空調實驗做驗證，證明模擬方法的可靠度，接著建立攝影棚模型進行數值計算，並於攝影棚現場測量實際溫度場以和模擬結果相互比對。 由結果顯示，FDS在室內空調實驗的驗證結果準確，FLUENT則在溫度計算上誤差較大。在攝影棚流場分析中，兩套軟體的計算結果均表明，在攝影棚現場可施工範圍的限制下對空調性能並無太大的改善。將攝影棚現場溫度與模擬結果比對後，發現FDS的計算符合實驗值，其結果具可信度。

The motivation of this thesis is due to the improper design of air conditioning in the studio, which results in poor air conditioning performance. Two computational fluid dynamics (CFD) softwares are applied to analyze the flow and temperature fields. One is ANSYS/FLUENT, the other is Fire Dynamics Simulator (FDS). This thesis is separated into three parts. First, FLUENT and FDS are applied to compare with Ting-Ya Tsai’s measurements, which built an experimental field with underfloor air distribution system. Next, use both FLUENT and FDS to analyze flow field of the studio, including different adjustments of entrance condition. Then, experiments are carried out to measure the temperatures when the studio is being used and, finally, a comparison between simulation and experiment results is given. From the current result, FDS is more accurate then FLUENT when comparing with Ting-Ya Tsai’s research. According to the simulation results of the studio, it will have no obvious improvement if the catwalk is keeping to intact with air flow. After comparing the predictions and measurements in the studio, it is found that the boundary conditions match with the real situation.