温度传感器动态响应校准水槽流场实验研究
Experimental study on flow field in calibration bath for temperature sensors'dynamic response
刘波 1乔家广 1牛亚琳 1马超1
作者信息
- 1. 上海市计量测试技术研究院,上海 201203
- 折叠
摘要
流速是温度传感器热响应时间的显著影响量,针对自研温度传感器动态响应校准装置,开展了恒温恒速循环水槽流场实验研究.结果表明,在Ⅰ至Ⅲ级流速设置下,靠近射流柱位置的流速分别为0.4、0.5、0.6m/s,竖直向流速呈近似抛物线分布;在下游位置流速减小0.1m/s,竖直向流速分布更加均匀,流速波动度减小:流场主要受出射流分布和回水的影响.实验确定了符合校准规范的位置范围,为保证温度传感器动态响应校准结果的有效性提供了依据.
Abstract
The flow rate is a significant influence on the measurement of the temperature sensors thermal response time.The experimental study on flow field in constant temperature and velocity circulating water bath was carried out at the self-developed calibration device for the temperature sensors'dynamic re-sponse.The results show that the flow rate near the jet column is 0.4 m/s,0.5 m/s and 0.6 m/s at the class Ⅰ to Ⅲ flow rate settings,and the flow velocity distributions in vertical are approximately paraboli-c.At the downstream position,the flow rates decrease by 0.1 m/s,the flow rate distributions in vertical are more uniform,and the flow velocity fluctuations decrease.The analysis shows that the flow field is mainly affected by the jet distribution and the back water.Through the experimental study,the positions that meet the calibration specifications are determined,which ensures the validity of the calibration re-sults of the temperature sensors'dynamic response.
关键词
计量学/温度传感器/动态响应/校准水槽/流场Key words
metrology/temperature sensor/dynamic response/calibration water bath/flow field引用本文复制引用
出版年
2024
NETL
NSTL
万方数据