瞬态热流法测定液体和固体热扩散系数的实验研究

Determination of Thermal Diffusivities of liquids and solids by the Transient Heat Flow Method

报道了用非稳定瞬态热流法测定物料热扩散系数α的原理和测试技术。导出了测算方程,测定了6种不同液体和固体的α值,所得值与文献值较为吻合。与传统方法相比,建立的测试装置及方法简单、方便、迅速、重复性好。

Determination of the thermail diffusivity a by means of the theory of non - steady transient heat flow was studied and the calculative equation was proposed as well. Thermal diffusivity values were six different liquids and solids were measured and the experimental results of a were in agreement with published data. The device and method proposed are simple and convenient and repeatable as compared with traditional ones. A principle and technique of measurement of the with the is in this paper have been given for. The six of liquids are detected as well. The detector is simple and the measurement is convenience and good repeatability as it is a good detected technique for rapid measurement of the thermal diffusivities.