A simplified model for unsteady airflow analysis in ultra-long tunnels based on the resistance compensation method
作者机构：School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China CSCEC Southwest Consulting Co.LtdChengdu 610041SichuanChina School of ArchitectureTsinghua UniversityBeijing 100084China
出 版 物：《Building Simulation》 (建筑模拟（英文）)
年 卷 期：2024年第17卷第10期
页 面：1823-1840页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）]
基 金：supported by the Laboratory Basic Research Program of China State Railway Group Co. Ltd.(L2021G011)
主 题：resistance compensation dynamic mesh ultra-long tunnel simplified model unsteady airflow
摘 要：With the expansion of tunnel construction scale,accurate modeling of 3D unsteady flow fields in ultra-long tunnels requires high computational *** this study,a resistance compensation method based on the St and Eu similarity criterion is proposed to construct the simplified model to rapidly and precisely replicate the train-driven unstable airflow.A 6000 m ultra-long tunnel is utilized as a reference model and simplified models with the scale ratio varying from 80%to 10%are developed to assess the method *** multi-region dynamic mesh model is employed to simulate train tracking *** weighing the computational accuracy and efficiency,the results show that 20%is the optimal scale *** unsteady wind speed of the simplified model deviates 6.96%from the reference model,while the simulation computation time is reduced by 85.01%.On this basis,the simplified model is applied to analyze the impacts of tunnel friction coefficients,blockage rates,train lengths and speeds,and departure *** mean bias error(MBE)and Pearson correlation coefficient(PCC)are within 10%and over 0.8 respectively,confirming the reliability of the simplified *** resistance compensation method is a crucial technique to improve the accuracy and efficiency of the unsteady flow field in ultra-long tunnels.
维普期刊数据库