步入式恒温恒湿室的送风参数设定与效果分析OA

The calibration of temperature and humidity instruments in high-precision constant temperature and humidity chambers can effectively improve metrological verification efficiency.To design a walk-in constant temperature and humidity chamber with sufficient accuracy for instrument calibration,CFD simulation software was employed to simulate and andanalyze the physical model of the chamber.The distribution of temperature and humidity fields inside the chamber was determined based on simulation results.The evaluation metrics included the average temperature,average humidity,temperature uniformity,and humidity uniformity of the chamber at steady state.Using air supply angle,air supply outlet position,and air supply volume as variables,nine air supply schemes were designed via the orthogonal experimental method.The results indicated that the air supply volume significantly impact the chamber's performance metrics,while the air supply angle and outlet position show no notable influence.The optimal air supply parameters were identified as an air supply angle of 10°,an air supply outlet positioned 30 cm from the top,and an air supply volume of 500 m³/h.This study provides theoretical guidance for the construction of high-precision constant temperature and humidity chambers.