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地铁作为一种地下建筑,具有一定的密封性,其内部有显著的内热源。列车在区间内的运行,伴随着将输入的电能转换为热量排放到区间内。根据列车的运行状态,将发热量定量分析,拟合了单列列车在1 000 m隧道区间运行中,以不同最高时速运行时下,单次列车通过的区间的得热量。匀速运行时的列车产热占到了54%,制动过程的发热强度最大。将列车在区间内运动简化为物理模型,列车的运行的过程产热作为移动内热源,采用动网格技术模拟了区间隧道的非稳态热环境。对列车动态环境下的热量分配进行了线性回归,表明留在区间隧道内热量较小,大部分热量随着活塞风的传递作用进入前方站台和前方隧道区间,列车运行速度对热量分配存在不一的影响。
Subway as a underground building, has a certain degree of sealing, which has a significant internal heat source. The operation of the train in the interval is accompanied by the conversion of the input electrical energy into heat and into the interval. According to the running status of the train, the calorific value is quantitatively analyzed, and the heat gain of the train passing the single train at different maximum speed speeds is obtained when the single train runs in the 1 000 m tunnel interval. The train heat generated by the uniform operation accounted for 54% of the total, and the braking process had the highest heating intensity. The train movement in the interval is simplified to a physical model. During the operation of the train, heat is generated as a moving internal heat source, and the moving tunnel technique is used to simulate the unsteady thermal environment of the tunnel. The linear regression of the heat distribution in the dynamic environment of the train shows that the heat left in the tunnel is small and most of the heat enters the front platform and the front tunnel with the transmission of piston wind, Impact.