泄漏源间距对多源重气泄漏扩散的影响

Impact on multi-source heavy gas leakage and diffusion of leakage source distance

开展小尺寸多源重气泄漏扩散的实验研究,探究泄漏源间距对多源重气泄漏扩散相互作用的影响,并给出参考临界值。结果表明:不同泄漏源间距的气体浓度随扩散距离的变化基本符合指数衰减函数规律;在泄漏源附近,气体浓度与泄漏源间距呈明显线性关系;当相对孔间距小于30时,泄漏源间距增大会降低泄漏源附近的气体浓度,降低气体浓度下降速率,增大气体扩散范围;当相对孔间距大于30时,在泄漏源附近基本不能发生混合,气体浓度衰减趋势不能满足指数衰减公式,可视为2个单源重气泄漏。

A small scales experimental study on multi-source leakage and diffusion of heavy gas has been developed,and the effects for the multi-source heavy gas leakage of the leakage source distance have been considered with a reference critical value.The results show that with various leakage source distance,the law of gas concentration changing with the diffusion distance basically conforms with the exponential decay function.A linear relationship shows between the gas concentration and the leakage source distance near the sources.When the aperture ratio is less than 30,the concentration of gas near the sources decreases,the concentration decreasing rate reduces and the gas diffusion range increases with the leakage source distance increases.When the aperture ratio is more than 30,there is no mixing near the leakage source,and the attenuation trend of gas concentration cannot fit the exponential decay function,and it can be considered as two single source leakage of heavy gas.