基于射流模型的大空间烟气填充研究

Research on the smoke filling in large space based on jet model

采用射流模型预测大空间烟气层的变化规律,并与理想羽流模型预测值及全尺寸池火灾的数据进行分析比较.结果表明：射流模型预测值与理想羽流模型预测值的相对误差为0.7％～11.1％,在工程允许范围内;由于初期阶段没有形成稳定的烟气层,射流模型预测值与实验值有一定误差,但随着烟气层下降至4 m时,射流模型与全尺寸的池火灾试验相比,其相对误差仅为2.96％,说明射流模型能够用于预测大空间烟气层高度变化规律.

The variation of smoke layer was predicted by jet model,and compared with the data of ideal plume model and full-size pool fire.Results showed that：The relative error between jet model and ideal plume model is 0.7% ～ 11.1%,which satisfies the engineering requirement; since the smoke layer is not stable in the early stages,there are a certain errors between the value based on jet model and experimental values;as the smoke layer drop to 4 m,the relative error between jet model and the experiment is only 2.96%.The paper showed that the jet model can be used to predict the variation of smoke layer height in large space.