【正文】 外文資料翻譯 第 4 頁 by Launder and Spalding. And it integrated the governing equation on the capital control volumes and discretized in the definite grids, at last simulated and puted with the AIRPAK software. . Preceding simplifications and presumptions Because of mechanical ventilation and the existence of traindriven piston wind, the turbulence on platform is transient and plex. Unless some simplifications and presumptions are made, the mathematics model of threedimensional flow is not expressed and the result is divergent. While ensuring the reliability of the putation results, some preceding simplifications and presumptions have to be taken. (1) The period of maximum air velocity is paid attention to in the transient process. Apparently the maximum air velocity is reached at the period when train stops at or starts away from the station (Yau et al., 2020。 1．介紹 CFD（ Computational fluid dynamics） 軟件通常是模擬流動(dòng)性流程圖。 Allocca et al., 2020。 Gehrke et al., 2020). 早期的 CFD 隧道通 風(fēng)系統(tǒng)的模擬大體上集中在緊急情況如著火的情況下 (Modic, 外文資料翻譯 第 9 頁 2020。它的本質(zhì)是計(jì)算和模擬在結(jié)構(gòu)成型以前，因?yàn)榈罔F投資建設(shè)是巨大的 而且建設(shè)是要經(jīng)過上十年的時(shí)間?；谠诘罔F通風(fēng)系統(tǒng)的人工向?qū)б鈭D，這種研究模擬和分析已經(jīng)存在的通風(fēng)系統(tǒng)同時(shí)通過專業(yè)軟件 AIRPAK得出天津地鐵原先的車站位置需要重建，然后為重建車站找到最佳的通風(fēng)的項(xiàng)目和結(jié)構(gòu)。每邊只有僅有一個(gè)通道（長(zhǎng)寬＝ ）。橫向網(wǎng)格通風(fēng)口縱向設(shè)計(jì)風(fēng)速為 。 . 設(shè)計(jì)結(jié)構(gòu)和重建車站的通風(fēng) 預(yù)計(jì)旅客大規(guī)模的增加和原先車站體積太小，所以重建設(shè)計(jì)的地鐵結(jié)構(gòu)體 系將被設(shè)計(jì)為，長(zhǎng)寬高＝ 并且每邊有兩個(gè)乘客通道。盡管天津地鐵現(xiàn)存的各種車站有著不同結(jié)構(gòu)和幾何結(jié)構(gòu) ，西南車站就是最典型的一個(gè)。 Modic, 2020。 Sigl and Rieker, 2020。 Katolidoy and Jicha, 2020)。 CFD 還可以模擬流動(dòng)性問題的多種情況 (Gan and Riffat, 2020。并且用兩個(gè)二平衡空氣紊亂模型同樣與它的物理模型。 Gao et al., 2020。 Moureh and Flick, 2020). So CFD is now a popular design tool for engineers from different disciplines for pursuing an optimum design due to the high cost, plexity, and limited information obtained from experimental methods (Li and Chow, 2020。 外文資料翻譯 第 1 頁 CFD simulation and optimization of the ventilation for subway sideplatform FengDong Yuan *, ShiJun You Abstract To obtain the velocity and temperature field of subway station and the optimized ventilation mode of subway sideplatform station, this paper takes the evaluation and optimization of the ventilation for subway sideplatform station as main line, builds three dimensional models of original and optimization design of the existed and rebuilt station. And using the twoequation turbulence model as its physics model, the thesis makes putational fluid dynamics (CFD) simulation to subway sideplatform station with the boundary conditions collected for simulation putation through field measurement. It is found that the twoequation turbulence model can be used to predict velocity field and temperature field at the station under some reasonable presumptions in the investigation and study. At last, an optimization ventilation mode of subway sideplatform station was put forward. 1. Introduction Computational fluid dynamics (CFD) software is monly used to simulate fluid flows, particularly in