模拟降雨机降雨均匀性测试及影响因素分析  

Rainfall Uniformity Test of Simulated Rainfall Device and Analysis of Influencing Factors

作　　者：任凯珍 吕晓波 孙旭 赵娜娜 Ren Kaizhen;Lv Xiaobo;Sun Xu;Zhao Nana(Beijing Institute of Geological Disaster Prevention and Control,Beijing 100120)

机构地区：[1]北京市地质灾害防治研究所,北京100120

出　　处：《中国仪器仪表》2023年第5期25-28,共4页China Instrumentation

基　　金：北京市突发地质灾害监测预警系统(一期)工程运行项目。

摘　　要：为了有效模拟天然降雨,开展了模拟降雨机不同高度和压力组合下的降雨均匀性测试。测试结果表明:模拟降雨机高度为2.4m,水压为0.035kPa、0.040kPa、0.045kPa、0.050kPa和模拟降雨机高度为2.2m,水压为0.040kPa、0.045kPa、0.050kPa的情况下,降雨均匀系数大于80%,符合降雨动能与天然降雨动能相似需求的条件。根据降雨均匀系数测试数据相关性分析得出:当高度为2.4m和2.6m时,水压对降雨均匀性的影响相对较小;当水压为0.040kPa、0.045kPa、0.050kPa时,高度对降雨均匀性的影响相对较小。以上测试和计算方法可作为试验开展前模拟降雨机参数选择的参考。In order to effectively simulate the natural rainfall,the rainfall uniformity test under different heights and pressure combinations of simulated rainfall devices was carried out.The test results show that the rainfall uniformity coefficient is greater than 80%when the height of the simulated rainfall device is 2.4m,the water pressure is 0.035kPa,0.040kPa,0.045kPa,0.050kPa and the height of the simulated rainfall device is 2.2m,and the water pressure is 0.040kPa,0.045kPa,0.050kPa,which meets the conditions that the kinetic energy of rainfall is similar to that of natural rainfall.According to the correlation analysis of rainfall average coefficient test data,when the height is 2.4m and 2.6m,the influence of water pressure on rainfall uniformity is relatively small;When the water pressure is 0.040kPa,0.045kPa and 0.050kPa,the influence of height on rainfall uniformity is relatively small.The above test and calculation methods can be used as a reference for parameter selection of simulated rainfall device before the test.

关 键 词：模拟降雨机 降雨均匀性 高度 压力 

分 类 号：P426.6[天文地球—大气科学及气象学] P435