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Basic ideas and concepts in hot wire anemometry: an experimental approach for introductory physics students

机译:热线风速测定的基本思想和概念:物理入门课程的实验方法

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摘要

The purpose of hot wire anemometry is to measure the speed of an air stream. The classical method is based on the measure of the value of a temperature dependant resistor inserted in a Wheatstone bridge (Lomas 1986 Fundamentals of Hot Wire Anemometry (Cambridge: Cambridge University Press)). In this paper we exhibit the physics behind this method and show that by using a wire whose resistance does not vary on the field of temperature explored (from 20 °C to 200 °C), it is however possible to make accurate measurements. Finally, limitations of the method are discussed.
机译:热丝风速计的目的是测量气流的速度。经典方法是基于测量插入惠斯通电桥中的温度相关电阻器的值(Lomas 1986热线风速法基础知识(剑桥:剑桥大学出版社))。在本文中,我们展示了此方法背后的物理原理,并表明通过使用电阻在所探索温度范围(从20°C到200°C)上不变的导线,可以进行精确的测量。最后,讨论了该方法的局限性。

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