风道内两种测定速压方法的试验对比分析

通过在“新型多功能矿井通风安全实验装置”上所进行的对比试验 ,分析了在工业通风及空调工程的风道中 ,采用多点联合测试速压比多测点测试的误差偏大的原因 ,且误差的大小 ,受风道测试断面速压分布的相对不均匀度影响 ,相对不均匀度值愈大 ,误差亦愈大 .因而 ,在工程测试时 ,用皮托管———压差计测试风道内的平均速压 ,应选择多测点逐点测试计算法 .

The testing comparative analysis of the two-way determination speed pressure in wind channel

By the comparative tests performed on the new_type multi_function mine ventilation safety testing equipment;it has analyzed the causes that more error made by way of multi_point combination determinating speed pressure than the way of multi_point in industrial ventilation and in the project of the air control in wind channel,it is considered that more or less error are effected by the relative non_uniform of the speed pressure distribution on the section which should be determined in the wind channel.It has stated that the larger the relative non_uniform degree the more error it is.Therefore,it should choose UNIPED test of the multi_point and the point by point method to calculating the average speed pressure by Pitometer?——differetial pressure flowmeter when the project is being tested.