消火栓水枪喷嘴水力计算方法的简化

A Simplification of Method for Hydraulic Calculation of Water Gun Nozzles for Hydrants

针对目前消火栓喷嘴水力计算采用试算及图表法所存在的问题,通过对原求解函数的优化拟合,推导出可直接计算的解析式,便于基层设计人员在实际工程设计中应用。对该解析式计算精度的分析表明,在常用参数范围内,最大拟合误差仅为1.49%,满足现行规范要求。

In view of the problems existing with the use of trial-calculation method and chart method in the hydraulic calculation of hydrant nozzles,an analytic equation which can be directly used in calculation is deduced through optimizing and fitting the original solving function,which can be easily applied by basic-level designers in practical engineering design.It is shown by the analysis of the calculation accuracy with the said analytic equation that within the range of normally-used parameters,the maximum fitting error is only1.49%,which satisfies the requirement in the current norms.