HYDRODYNAMICS AND HEAT TRANSFER IN THE CASE OF COMBINED FLOW IN A ANNULAR CHANNEL OF SMALL CROSS SECTION

The present work is a continuation of experimental investigations conducted at the Moscow Power Engineering Institute (MPEI) on heat-transfer intensifi cation. Brief descriptions of the working section and structure of intensifi ers are given and their basic geometric parameters are enumerated. New systematized experimental data on the coeffi cients of hydraulic resistance and heat transfer in the regime of single-phase convection are given in an extended range of regime parameters and geometric characteristics of the intensifi ers. Considerable increase in the heat-transfer coeffi cient as a function of the geometric characteristics of the intensifi er has been established experimentally. The values of the relative fi n height, at which these are the maxima of heat transfer and hydraulic resistance, have been established. Calculated dependences for the coeffi cient of hydraulic resistance and heat transfer have been obtained.
The present work is a continuation of experimental investigations conducted at the Moscow Power Engineering Institute (MPEI) on heat-transfer intensifi cation. Brief descriptions of the working section and structure of intensifi ers are given and their basic geometric parameters are enumerated. New systematized experimental data on the coeffi cients of hydraulic resistance and heat transfer in the regime of single-phase convection are given in an extended range of regime parameters and geometric characteristics of the intensifi ers. Considerable increase in the heat-transfer coeffi cient as a function of the geometric characteristics of the intensifi er has been established experimentally. The values of the relative fi n height, at which these are the maxima of heat transfer and hydraulic resistance, have been established. Calculated dependences for the coeffi cient of hydraulic resistance and heat transfer have been obtained.
Author:  A. T. Komov, A. N. Varava, A. V. Dedov, A. V. Zakharenkov, and É. A. Boltenko
Keywords:  annular channel, heat-transfer intensifi cation, interacting fl ows, twist step, single-phase convection, experimental data, coeffi cient of hydraulic resistance, heat-transfer coefficient.
Page:  160