降雨发生装置多喷头仿真和测试研究

Simulation and Tests of Multiple Sprinklers Rainfall Generator

为了实现自然条件下降雨强度的全范围的模拟,基于单个喷头的测试结果,将单喷头试验得到的水量分布数据作为一个多维向量,建立了多喷头在正方形布置时的仿真模型,得到不同间距条件下的均匀度系数和降雨量等值线图,分析确定最佳间距。并在此最佳间距下进行了实测试验,对4个喷头组合时降雨发生装置产生降雨环境进行均匀性和稳定性分析。结果表明:在目前的降雨发生装置产生的降雨环境中,可以在稳定时间之后,在东、西、南、北四个位置布置翻斗式雨量计进行大降雨强度测试。

In order to realize the full scope simulation of natural rainfall intensity,the observation pattern acquiredfrom single sprinkler is regarded as a multi-dimensioned vector,on which the established model of multiple sprin-klers in square layout is based. Then,the data of coefficients of uniformity and rainfall isoline map for four over-lapped sprinklers are analyzed and the optimum spacing is ascertained. Further more,in the condition of the opti-mum spacing,an experiment is conducted to evaluate uniformity and stability of the rainfall environment. The testresults indicate that tipping-bucket raingaugescan be located in four quarters of the compass so as to carry out largerainfall intensity test after the stability time in the current rainfall generator environment.