本文選題：區(qū)間隧道 + 巖土層吸熱�。� 參考：《地下空間與工程學(xué)報》2014年04期

【摘要】：列車在地鐵隧道中運行時,會產(chǎn)生大量的熱,一部分被隧道內(nèi)巖土層吸收,其它部分散失在空氣中,隨列車活塞風(fēng)帶入站臺。本文假設(shè)在新建單線隧道,一列車行駛周期內(nèi),對隧道內(nèi)活塞風(fēng)溫度變化規(guī)律進行理論分析。隧道內(nèi)列車散熱假設(shè)為移動熱源,將隧道區(qū)間內(nèi)的空氣流動簡化成一維管流,活塞風(fēng)與隧道壁面發(fā)生對流換熱,根據(jù)隧道內(nèi)空氣的熱平衡,建立簡單的流固耦合模型。簡化后得到新建地鐵區(qū)間隧道活塞風(fēng)溫度變化數(shù)學(xué)模型,并給出其數(shù)值計算方法,借鑒上海某地鐵的參數(shù),利用MATLAB軟件計算并繪出整個過程中隧道內(nèi)活塞風(fēng)溫度變化曲線,隧道內(nèi)活塞風(fēng)溫度下降約1.9℃。分析發(fā)現(xiàn)隧道內(nèi)的巖土層溫度、隧道長度和列車速度等影響隧道內(nèi)溫度分布和溫度變化幅度。
[Abstract]:When the train is running in the subway tunnel, it will produce a lot of heat, some of it will be absorbed by the rock and soil layer in the tunnel, the other part will be lost in the air and brought into the platform with the piston wind of the train. In this paper, it is assumed that in a new single-track tunnel, the variation of piston wind temperature in a new tunnel is theoretically analyzed during the running period of a train. The heat dissipation of the train in the tunnel is assumed to be a moving heat source, and the air flow in the tunnel section is simplified into a one-dimensional pipe flow. The piston wind and the tunnel wall are convection heat transfer. According to the heat balance of the air in the tunnel, a simple fluid-solid coupling model is established. After simplification, the mathematical model of piston wind temperature change in newly built subway tunnel is obtained, and its numerical calculation method is given. Using the parameters of a subway in Shanghai, the temperature change curve of piston wind in the whole tunnel is calculated and plotted by using MATLAB software. The piston air temperature in the tunnel decreases by about 1.9 鈩，

本文編號：1881854