恒温恒速水槽流速测量方法及不确定度分析

Measurement Method and Uncertainty Evaluation of Flow Velocity in Constant Temperature and Constant Velocity Water Bath

恒温恒速水槽是实现温度传感器动态响应校准环境的设备,其中,流速为关键性能参数。本文探讨了恒温恒速水槽流速的两种溯源方式,并进行不确定度评定。结果表明:针对环形筒体结构,转速半径乘积法明显小于流速仪法测得值不确定度。

The constant temperature and speed water tank is a device to realize the dynamic response of temperature sensor calibration environment,in which the flow rate is the key performance parameter.In this paper,two ways of tracing the flow velocity of a constant temperature and constant velocity tank are discussed,and the uncertainty e-valuation is carried out.The results show that the product of rotational speed and radius method is obviously less than the uncertainty of the value measured by the current meter method for the ring cylinder structure.