Study of Heat Transfer in Pneumatic Pulsator

Abstract

The article presents selected results of research work aimed to rationalize and optimize the design of the pneumatic pulsator due to thermal conditions. Pneumatic pulsator is a device used in industry storing bulk and loose materials. It is attached to the silo, allowing their correct operation. The air friction against the inner wall of the pulsator causes the release of heat. In order to investigate the conditions of heat transfer, thermal calculations were made and then numerical simulations using Computational Fluid Dynamics (CFD) were conducted. Various fins options were examined. The objective was to maximize the heat flux discharged from the device. Temperature distribution on the surface of the fins designated by CFD corresponds to the distribution designated analytically. The results were confirmed by industrial tests. Numerical simulations mapping the heat exchange processes in a pneumatic pulsator have not yet been carried out.

Phase Structure Evolution of the Fe-Al Arc-Sprayed Coating Stimulated by Annealing

“…Additionally, they are highly resistant to erosion [19] and cavitation [20,21], and have relatively low density and low prices compared to corrosion-resistant [22,23] and acid-resistant steel [24], which require application expensive elements, such as Cr, Ni, Mo [25][26][27]. The intermetallics owe their special properties to their ordered structures with strong chemical bonds and simultaneous dense packing of atoms in crystal lattices, which leads to reduced diffusion velocity, creep resistance, and resistance to high-temperature corrosion [28][29][30][31].…”