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Fluent的CFD地下車站安全通風設計

時間:2019-05-05 20:30來源:畢業論文
通過了Fluent的自身功能進行了一定的研究。但是這樣受到了限制,存在一定誤差,比如我們不能使用非穩態功能,無法來模擬時間與溫度、速度的關系和變化

摘要:地鐵的通風系統對于每個乘坐地鐵的人而言,都是十分重要的,一個安全舒適的地下環境都是不可或缺的。由于地鐵的特殊性,每天乘坐地鐵的人流量十分大,逃生難度較高,一旦發生火災,將造成大量的人員傷亡,和經濟財產的損失。所以在使用數值模擬的基礎上對地下車站安全通風進行設計。35174
本文使用gambit軟件對地下車站進行建模,運用fluent軟件對車站進行計算研究。如我們所知,不同城市,不同站點,不同線路的地下車站都是有差別的。而且地鐵屏蔽門系統的造價較為昂貴,在全國只有少數城市是采用屏蔽門系統的。所以本文選擇的地下車站較為簡單,且為無屏蔽門的老式地下車站。地下車站在正常運營時,利用地鐵隧道口的風速進行通風,一旦發生火災,地鐵站臺的排煙口會進行排煙,且站臺通往站廳的樓梯口有一個不小于1.5m/s的進口風速。本文主要考慮不同情況下的速度與溫度的變化趨勢,并選出最佳的方案。
CFD是近代流體力學,數值數學計算機科學結合的產物,是一門具有強大生命力的邊緣科學。所有的商用CFD軟件均包括3個基本環節:前處理、求解和后處理。與之對應的程序模塊簡稱為前處理器、求解器和后處理器。就目前來說,Fluent是國際上比較受歡迎的CFD軟件包,在美國市場的占有率是60%。只要是跟流體、熱傳遞及化學反應等有關的都可以使用。它含有豐富的物理模型、先進的數值方法和強大的前后處理功能,在各行各業的研究設計中都廣泛的應用著。 源¥自%六:維;論-文'網=www.aftnzs.live
本文利用數值模擬的方法研究某地下車站的安全通風情況。但是由于時間有限,本文只通過了Fluent的自身功能進行了一定的研究。但是這樣受到了限制,存在一定誤差,比如我們不能使用非穩態功能,無法來模擬時間與溫度、速度的關系和變化。
此外,本文中我只從溫度和速度兩個方面進行了Fluent的數值計算。但Fluent的功能還有很多,可以從其他的方面使用Fluent來進行研究分析。
畢業論文關鍵詞:地鐵;通風;數值模擬;Fluent
The Safety Ventilation Design Of The Underground Station
Abstract: Subway ventilation system for each subway ride to the people is very important, a safe and comfortable underground environment is indispensable. Due to the particularity of the subway everyday take the subway traffic is very big, the escape of a higher degree of difficulty, in the event of a fire, it will cause a large number of casualties, property and economic losses. So the design of the underground station ventilation safety in using numerical simulation based on.
The modeling of the underground station using gambit software, the use of the station is calculated based on fluent software. As we know, different city, different sites, different lines of the underground station is a difference. But the subway shield door system cost is more expensive, in only a minority of the city is the screen door system. So this paper chooses the underground station is relatively simple, and without shield old underground station. Underground station in normal operation, the ventilation was carried out using the subway tunnel wind speed. In the event of fire, the subway station exhaust port will exhaust and platform leading to the station in the office of the staircase mouth has a not less than 1.5m/s inlet velocity. This paper considers the variation trend of the velocity and temperature under different conditions, and select the best scheme.
源¥自%六:維;論-文'網=www.aftnzs.live

CFD is a modern fluid mechanics, numerical mathematics and computer science with the product is a strong vitality of frontier science. All the commercial CFD software includes 3 basic steps: pre-processing, solution and post-processing. The corresponding program modules referred to as preprocessor, solver and post processor. At present, Fluent is the international popular CFD software package, the market share is 60% America. As long as it is related to the fluid, heat transfer and chemical reaction can be used. It contains rich physical model, advanced numerical methods and the strong pre processing functions, in the research and design of all walks of life are widely used. Fluent的CFD地下車站安全通風設計:http://www.aftnzs.live/gongcheng/20190505/33011.html
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