Year: 2024
Type: article
Abstract: An experimental setup has been designed to study local conditions of non-stationary heat exchange during cooling of a high-temperature surface with a sprayed liquid: from nozzles of various modifications (including sprayers); water-air; steam-air; steam-water; superheated liquid; water with different concentrations of surfactants. An analysis of scientific sources has determined a research methodology that will allow the study of the influence of irrigation density, surface temperature, degree of liquid underheating, its velocity and angle of flow onto the surface, taking into account the possibility of implementing a change in the determining factors in the range of their corresponding real values in natural energy and metallurgy facilities and the task of selecting a method for identifying the boundary conditions of heat exchange. We have not come across any studies of heat exchange intensity as a function of underheating of sprayed liquid – water with different concentrations of surfactants at different local irrigation densities and surface temperatures in scientific publications. Therefore, these studies, as well as the development of effective cooling systems or determination of the thermal state of objects under various external influences, are of primary importance to us. In order to implement our planned research program, in addition to developing a method for identifying the boundary conditions of heat exchange, it was necessary to solve a number of special problems associated with determining the operating parameters of the cooling medium. These include the local irrigation density and the velocity of the dispersed medium at the surface of the thermal probe. For reliable determination of local irrigation flow rate, as well as determination of the dispersed composition of drops, the pulse counting method, which has the possibility of practical implementation in our country, should be used. To determine local conditions of non-stationary heat exchange, we have developed a scheme for measuring the EMF of temperature detectors installed in the body of the rod of the thermal probe, and also selected high-speed digital recording equipment. The solution of the inverse problem of heat conduction will allow us to establish the degree of influence of practically all factors indicated as determining ones.
Authors: Yu. A. Selikhov, A. M. Mironov, K. O. Gorbunov, V. G. Ris
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4405890804