Experimental study on flow field in calibration bath for temperature sensors'dynamic response
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.
metrologytemperature sensordynamic responsecalibration water bathflow field
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