流体在高频振荡下的换热加强现象的实验研究(英文)

本文给出水在一组毛细管中振荡时的换热加强现象的实验结果。实验表明：热流的轴向传导率可以比不加振荡情况提高四个量级；还表明在高频振荡下有效热扩散率与振荡幅度的平方及频率的平方根成正比，与毛细管的直径成反比。和近期推得的这种流动的层流理论相比较，结果是十分吻合的。

Experimental Observations on Enhanced Heat Transfer in Fluids Subjected to High Frequency Oscillations

Experimental measurements on enhanced heat transfer in water oscillated within a capillary bundle are presented. It is shown that axial conduction heat flows at least four orders of magnitude larger than those existing in the absence of oscillations are achievable and that the effective thermal diffusivity at high frequencies is proportional to the square of the tidal displacement, the square root of frequency and inversely proportional to the radii of the tubes constituting the capillary bundle. Agreement with a recently developed laminar theory for the process is shown to be excellent.