Adaptation of the hot-wire viscosity sensor to a flowing system using a shield of low thermal conductivity
Adaptation of the hot-wire viscosity sensor to a flowing system using a shield of low thermal conductivity
复制标题
使用低导热率屏蔽将热线粘度传感器适应流动系统
DOI：
10.1016/0260-8774(93)90025-f
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Y. Saeki
中科院分区：
文献类型：
--
作者：
O. Miyawaki;Shinichi Akaike;T. Yano;Kensuke Ito;Y. Saeki
热线粘度传感器用于流动系统中，通过使用具有低热导率的屏蔽件（丙烯酸树脂），该屏蔽件包围热线传感器以消除屏蔽件外部的流动的影响。由于屏蔽材料的低导热性，传感器响应不受屏蔽外部的流动的影响。虽然由于热线传感器在测量过程中与本体流体绝缘而没有达到热稳定状态，但是从传感器响应的分析中获得了两个指标，即自然对流期间的零外推温度（ΔTa）和自然对流期间的起始温度（ΔTb）。这两个指标与测试流体的粘度具有良好的相关性。本技术消除了热线粘度传感器的主要缺点，即仅适用于停滞系统。
A hot-wire viscosity sensor was used in a flowing system by using a shield with low thermal conductivity (acrylic resin), which surrounded the hot-wire sensor to remove the effect of the flow outside of the shield. Because of the low thermal conductivity of the shield material, the sensor response was not influenced by the flow outside of the shield. Although a thermal steady state was not attained because the hot-wire sensor was insulated from the bulk fluid during the measurement, two indices, the zero-extrapolated temperature in the natural convection period (ΔTa) and the onset temperature of the natural convection period (ΔTb), were obtained from the analysis of the sensor response. These two indices showed good correlation with the viscosity of the test fluid. The present technique eliminates the major drawback of the hot-wire viscosity sensor, i.e. applicability only to the stagnant system.