论文部分内容阅读
为研究柱形压力容器泄爆规律,采用经典流体力学软件FLUENT对典型的柱形压力容器泄爆过程进行数值模拟,分析从泄爆口开启到泄压结束时间段压力发展、火焰传播、气体流动及可燃气体浓度变化特性。结果表明:不同泄爆压力下容器内压力发展变化呈现不同特点,在较小泄爆压力情况下会出现压力再度上升的双峰现象。泄爆过程中产生的湍流沿泄爆口附近容器壁拉长火焰面,并加快燃烧速率。同时就容器内不同点火位置对爆炸强度影响进行研究,得出在泄爆压力为0.04 MPa时,底面点火对本柱形压力容器产生的最大升压速率约为中心点火最大升压速率的1.4倍。
In order to study the law of the explosion of cylindrical pressure vessels, a classical hydrodynamic software, FLUENT, was used to simulate the typical process of pressure relief of column pressure vessels. The pressure development, flame propagation and gas flow were analyzed from the opening of vent to the end of pressure relief And combustible gas concentration changes. The results show that the pressure in the container under different vent pressure has different characteristics. Under the condition of small vent pressure, the bimodal pressure will rise again. Turbulence generated during venting lengthens the flame surface along the wall of the container near the vent, and accelerates the rate of combustion. At the same time, the influence of different ignition positions on the explosion intensity was studied. The conclusion is that when the pressure is 0.04 MPa, the maximal boost rate of bottom ignition to the cylindrical pressure vessel is about 1.4 times of the maximum boost rate of central ignition.