【摘要】 测量流过某一截面上的对流热流量,可以归结为测量流过该截面上各点介质的温度和速度。本文介绍利用热线风速仪恒流电桥将热线作为电阻温度计测定截面上各点温度的方法,设计了一种简易的探头温度校正装置。在速度测量中,讨论了热线温度补偿方法,介绍了极低速时的热线校正方法并建立了一种相应的校正设备。更多还原

【Abstract】 The measurement of heat flux in convection through a cross section can be made by measuring the temperature and the velocity of flow of the medium at certain point of the cross section. The method given in this paper is to use a Hot-Wire as a temperature probe which is an electrical resistance thermometer, being used to measure the temperature in flow field with a constant current bridge of Hot-Wire Anemometer·For the temperature probe a simple temperature calibrator has been designed and for the temperature probe to be used in flow field a compensation method is introduced and discussed·The calibration method for the Hot-Wire being used in the range of ultra-low-velocity is given and the calibration equipment are introduced also.更多还原