Modelling of Thermal and Gas-Dynamic Processes in the Porous Structures

M.N Gaynullin,S.V Zaika,V.A Sotova,E.O Barbonov,P.A Chertykovtsev

doi:10.1051/matecconf/201710802008

M.N Gaynullin, S.V Zaika + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/201710802008

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Abstract

In this article is considered the use of porous material in heat exchangers. The programming model with a porous regenerator heat exchanger was compiled in the program ANSYS Fluent complex. The paper does comparative analysis of influence of different material porosity on flow parameters.

Highlights

In recent years, there is an important issue about creating a highly efficient compact heat exchangers for different purposes in many branches of industry including aviation, space, missile and laser.[1,2] At the same time, emerging tasks can be successfully solved only in case of the intensification of heat transfer processes [3].One of the most promising and effective ways of heat intensification exchange processes is the use of heat exchangers porous metals
The physical basis of this method is in the high intensity of heat transfer between the metal frame and flowing coolant through it due to the high surface area of contact and effective mixing in the pores [4,5,6]
A wide range of porous materials properties, the ease of fabrication of these structural elements, the high intensity of heat – all these aspects enable to use the porous materials in diversified conditions

Summary

Introduction

There is an important issue about creating a highly efficient compact heat exchangers for different purposes in many branches of industry including aviation, space, missile and laser.[1,2] At the same time, emerging tasks can be successfully solved only in case of the intensification of heat transfer processes [3]. The physical basis of this method is in the high intensity of heat transfer between the metal frame and flowing coolant through it due to the high surface area of contact and effective mixing in the pores [4,5,6]. A wide range of porous materials properties, the ease of fabrication of these structural elements, the high intensity of heat – all these aspects enable to use the porous materials in diversified conditions. Thermal and hydraulic calculation of heat exchangers on the basis of porous structures is carried out using mass conservation equations, pulse strength and energy with appropriate initial and boundary conditions. For grabbing information about the hydraulic resistance mechanism and intensity of heat transfer at the moment of moving cooler in porous structures for the closure of a mathematical model, extensive experimental studies are needed. If the characteristics of the structures of small and medium porosity and heat and mass transfer processes in these studied enough, these questions are not studied deeply enough for the high porosity structures

The programme modelling in the program ANSYS Fluent complex

Calculations and air flow parameters’ dependence of the porosity

Findings

Conclusions