CAVITATION AND COLLAPSE OF A BUBBLE IN A LIQUID IN A HEAT PIPE

Investigations were carried out to study the mechanisms of heat transfer in heat pipes using the developed experimental stand consisting of a heat pipe, temperature measurement circuit, and a sensor for measuring the integral intensity of ultraviolet radiation. The temperature dependences of the intensities of electromagnetic and acoustic radiations of the liquid heated in a heat pipe have been obtained. It is shown that the acoustic and electromagnetic radiations of the liquid in a heat pipe depend mainly on the surface tension coeffi cient of the liquid and the size of the bubbles in it. It has been established that in order to reduce the destructive eff ect of cavitation and of the collapse of bubbles in the liquid in a heat pipe on its inner surface, it is necessary to minimize its surface tension coeffi cient, for example, by adding a small amount of organic oil to the water. Based on the analysis of the data on the energy liberated on collapse of a bubble in a liquid, a construction of a noiseless jet engine is suggested
   
Author:  G. A. Krivonosov
Keywords:  heat pipe, liquid, surface tension, cavitation, bubble collapse, noiseless jet engine
Page:  410