Investigations of thermal conductivity of metals in the field of centrifugal and vibration accelerations

31st International Conference on Equations of State for Matter

Lepeshkin, A.R.^1 ; Vaganov, P.A.^1

Baranov Central Institute of Aviation Motors Development, Aviamotornaya Street 2, Moscow

111116, Russia^1

关键词: Amplitude of oscillation;    Electron drift velocity;    Experimental investigations;    Practical importance;    Rotation frequencies;    Thermophysical characteristics;    Vibration acceleration;    Wiedemann-Franz law;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012022/pdf
DOI  :  10.1088/1742-6596/774/1/012022

来源: IOP

【 摘 要 】

The methods of investigations of a thermal conductivity of materials in the field of centrifugal radial and circumferential and vibration accelerations have been developed. The setup for investigation of thermophysical characteristics properties of materials on a spin rig, using a vacuum chamber, under the influence of centrifugal radial and circumferential accelerations and on a vibration rig under the influence of vibration accelerations have been proposed. The results of the investigations of an unsteady thermal state of heat-conductors (metal samples) in the field of centrifugal and vibration accelerations are given. From the analysis of the results of experimental investigations one can conclude that the thermal conductivity of the heat-conductors increases significantly by increasing the rotation frequency or amplitude of oscillations in comparison with a steady state. Thus, this increase of the thermal conductivity is associated with an increase of the electron drift velocity under the influence of centrifugal and vibration accelerations according to Wiedemann-Franz law. The results obtained are of practical importance for the calculations of the thermal state of the rotating parts of aircraft engines and other energy turbomachines.