HEAT EXCHANGE OF AN ANNULAR JET TRANSMITTED OVER A CYLINDRICAL SURFACE

Abstract

A large number of papers are devoted to theoretical and experimental studies of heat transfer and control of jet mixing processes. In this paper, a thermocouple for measuring the temperature of the cylinder surface, according to the amount of heat transmitted by a unit of the surface of the cylinder heated by an electric current when measuring the local heat exchange coefficient, the distribution of pulsation characteristics is studied using a thermoanemometer. The paper considers the problem of the distribution of laminar flow flowing through Ring nozzles of the last size along the cylinder of a constant radius along its length. When solving the problem, a semi-empirical speed profile is used. As the horizontal curvature increases, it is shown that the speed profile in the boundary layer in the cylinder is more filled in comparison with the speed profile in the plate. Later, a theoretical and experimental study of the longitudinal flow of a long cylinder, which is not smoothed by a uniform turbulent flow, was carried out. The study of the influence of acoustic effects on heat exchange in partially restricted lowland submerged currents and satellite flow is carried out. There is a possibility of resonant amplification of the turbulence development of a partially restricted flow, such as free flows. This reduces the length of the laminar boundary layer of the wall, shortens the laminar flow zone, and establishes the area where the turbulent flow previously developed. Exposure to high-frequency vibrations stretches the laminar-turbulent transition.