分岔隧道主线下游坡度对烟气回流长度的影响研究
Effect of the Mainline Downstream Slope on Smoke Back-Layering Length in Bifurcated Tunnels
DOI: 10.12677/me.2025.136149, PDF,    科研立项经费支持
作者: 罗成佳*, 廖梓富：重庆科技大学安全科学与工程学院，重庆
关键词: 分岔隧道；烟气蔓延；主线坡度；烟囱效应；Bifurcated Tunnel； Smoke Movement； Mainline Slope； Stack Effect
摘要: 为探析分岔隧道内火灾烟气蔓延规律，通过数值模拟研究了主线隧道下游坡度，纵向通风速度与热释放速率对烟气逆流长度的影响。设置分岔隧道下游坡度为1%、3%、5%、7%，火源热释放速率为2 MW、3 MW和5 MW。研究得出，主线隧道下游坡度变化明显影响隧道内烟气流动，随着下游坡度增加，隧道内烟气回流长度逐渐变短。
Abstract: To elucidate the spread of fire-induced smoke in bifurcated tunnels, numerical simulations were performed to quantify the effects of the downstream slope of the mainline tunnel, the longitudinal ventilation velocity, and the heat release rate on the smoke back-layering length. The downstream slope was set to 1%, 3%, 5%, and 7%, and the heat release rate to 2 MW, 3 MW and 5 MW. The results indicate that variations in the downstream slope significantly influence in-tunnel smoke flow; as the downstream slope increases, the smoke back-layering length progressively decreases.
文章引用：罗成佳, 廖梓富. 分岔隧道主线下游坡度对烟气回流长度的影响研究[J]. 矿山工程, 2025, 13(6): 1339-1348. https://doi.org/10.12677/me.2025.136149

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