电气设备环境试验室湿度场的数值模拟及优化  

Numerical simulation and optimization of the humidity field in environmental chamber of test with electric equipment

作　　者：蒲亮[1] 徐俊[1] 余锋[1] 高长永[1] 厉彦忠[1] 

机构地区：[1]西安交通大学能源与动力工程学院制冷与低温研究所,陕西西安710049

出　　处：《西安建筑科技大学学报（自然科学版）》2007年第5期716-720,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家教育部"教育振兴行动计划"二期建设平台

摘　　要：电气设备往往需要进行多工况的性能实验,这就需要环境室提供相应的温、湿度、压力等参数变化的实验条件,环境室内流场、温度场、湿度场的均匀性往往会影响实验效果.利用CFD技术对某一电气设备实验用环境室内部流场、温度场、湿度场进行了数值计算和模拟.主要讨论了送风温度、喷入液滴粒径对环境室内湿度场的影响.计算结果表明:送风温度越低、喷入液滴粒径越小,湿度场的均匀性越好;送风速度越大,湿度场则能更快达到稳态.最终给出了在所述计算条件下的送风速度和液滴喷入粒径的优化建议,为环境实验室内的气流组织布置和参数设计提供了一定的理论基础.Electric equipments are often tested under different conditions. It is necessary to offer such important alterable parameters by environmental chamber, as temperature, humidity and pressure, and the uniformity of three para-meters often influences the test results. To reveal the effect of the diameter of water droplet, inlet temperature and velocity in environmental chamber, a numerical calculation were conducted to investigate the flow and humidity field with FLUENT. The calculation results indicate that the uniformity of humidity meliorates with decreasing inlet temperature and droplet diameter. The stabilizing time of humidity field in chamber is dependent on the inlet velocity. The humidity field becomes steady more easily with the increasing inlet velocity. The optimal velocity and droplet diameter were acquired by calculation under certain conditions. It is also helpful for the design of the airflow organization and parameters in the environmental chamber.

关 键 词：环境室 湿度 数值模拟 

分 类 号：TB657.3[一般工业技术—制冷工程]