环境实验室温度均匀性的数值分析研究

目的研究送风参数及围护结构对飞机结构及机构环境条件下功能性和耐久性实验室温度均匀性的影响。方法采用CFD方法对实验室的气流组织进行数值模拟,根据气流组织评价标准对工作区的温度均匀性进行分析。结果送风温差越大、送风速度越小温度场均匀性越差,保温层较厚时,温差过大将导致工作区温度分布达不到设计要求。结论相同温差下,减少送风口数量并提高单个送风口的送风速度有助于提高温度均匀性。

Numerical Analysis of Temperature Uniformity for Climatic Test Chamber

Objective To study the influence of supply air parameters and thermal insulating layer to temperature uniformity of climatic test chamber for aircraft structure and mechanism. Methods air flow distribution was numerical calculated with CFD software,temperature uniformity was analyzed according to ventilation standards. Results the bigger the different between the temperature of supply air and the chamber,the less air flow rate would be needed and the uniformity of the working area would be worse. Big different in supply temperature and room temperature will cause temperature distribution totally out of design under thick thermal insulating layer. Conclusion Reduce supply openings while increasing supply air speed will help increase the uniformity under the same supply temperature.