船舶大空间舱室火灾烟气填充研究  

Studies of smoke filling process in large space cabin in ship

作　　者：邹高万 谈和平[1] 刘顺隆[2] 周允基[3] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [3]香港理工大学屋宇设备工程学系

出　　处：《哈尔滨工程大学学报》2007年第6期616-620,共5页Journal of Harbin Engineering University

基　　金：哈尔滨工程大学基础研究基金资助项目(HEUF040116)

摘　　要：进行了船舶大空间舱室池火烟气自然填充的试验研究,分别采用修正的适用于热驱动浮力流的N-S方程组、LES方法的场模拟程序和双层区域模拟程序对试验场景进行了模拟研究,对烟气层的沉降规律和烟气温度分布规律进行了分析.试验结果表明,烟气在大空间舱室内的沉降速度很快;烟气层的温度较低,对于以温度作为阀值的探测器和消防喷头很不利.试验结果和计算结果对比表明,区域模拟和大涡模拟均可以较好地预测大空间舱室内火灾烟气的填充规律,大涡模拟能获得比试验和区域模拟更完备的物理场信息;模拟计算时,池火的上升和下降可简单按照t2规律设定;试验采用热电偶法和摄像法来判定烟气层高度时,热电偶法容易获得较准确的结果.Tests to see how smoke from fires fills large spaces on a ship were carried out. Then experimental fires were simulated with a CFD package based on a modified set of Navier-Stokes equations for thermally driven buoyant flow and Large Eddy Simulation （LES） while also using a two-layer zone model. Descent law and temperature distribution of the smoke were analyzed. Experimental results show that smoke layers descende quickly and smoke temperature is low. As a result, detectors and sprinkler systems which are activated by temperature are at a disadvantage. Computed results and experimental results were compared with each other. Results show that the smoke filling process can be reasonably simulated by large eddy simulation with a zone model. A fire in its growth stage and during its decay period can be described by a t^2 curve. Smoke layer height can be read by both the thermocouple method and the camera method, but reasonable results can be obtained from the thermocouple method alone.

关 键 词：大空间舱室 火灾 烟气填充 大涡模拟 区域模拟 

分 类 号：U698.4[交通运输工程—港口、海岸及近海工程] X932[交通运输工程—船舶与海洋工程]