圆形管道风速测定与校正方法实验

Experimental study on determination and correction method of wind speed in circular pipe

针对通常所用的风速传感器只能监测某一点的风速,不能准确监测断面平均风速的问题,采用实验室研究测试和数值分析的方法,对圆形断面风速分布进行研究.根据断面中垂线上18个点的实测风速值,得出通过中垂线上某一点风速求该断面平均风速的校正系数.经验证,利用该风速校正系数能得出较为精确的断面平均风速值,为风速传感器的校正提供了一种技术途径.

Currently the wind sensor commonly used can only monitor the wind speed at one point,not the average wind speed at a cross-section.In order to overcome this problem,this paper investigates the wind speed distribution at a round section using the methods of laboratory test and numerical analysis.Based on the measured wind speeds at 18 points in the perpendicular bisector of a section,the correction coefficients for calculating average wind speed at the section using the wind speed at one point have been obtained.The study shows that a more accurate average wind speed at a cross-section can be obtained by using wind speed calibration coefficients.The study provides a technical mean for wind sensor calibration.