典型环境自动喷水灭火过程的数值模拟研究

Numerical Simulation and Study to Automatic Sprinkle System Operation in Typical Environment

数值模拟研究的手段就是将火灾过程中的确定性规律抽象成控制火灾过程的数学表达式(微分方程或代数方程),通过对控制方程的求解来模拟再现这种规律.用场模拟的方法对ISO9705火灾标准试验间的两种火灾进行数值模拟,并与相同条件下的实验结果进行比较分析.在此基础上,对标准住宅环境的喷头布置及喷头在不同流量下的灭火情况用场模拟进行数值模拟研究,并对上述情况下的热释放速率和设定温度点的温度变化情况进行规律性分析.给出用数值模拟方法对自动喷水灭火系统的工程应用和研究是可行的结论,为消防系统设计提供了理论依据.

Numerical simulation and study means to abstract the fire mathematical governing expression （differential or algebraic equations） from the determinacy law in the fire process, then resolve these governing equations to simulate and reappearance the law. Field model was used to simulate two types of fire in ISO9705 standard fire chamber; compare and analyse the results with the experimental ones under the same conditions. On this basis, field model was used to test the arrangement patterns of sprinkle heads in standard residence environment and single sprinkle head with different flow quantity in test chamber. The thermal release velocity and temperature variety of designed points in the fire chamber were analyzed in regulation. The conclusion is drawn that it is reliable to use numerical simulation for study and engineering application of automatic sprinkle system. Numerical simulation provides reliable foundational data for fire protection system design.