Mathematical Simulation of Heat Transfer and Chemical Reaction in a Swirling Flow of Equilibrium-Dissociating Gas

• Published in: Journal of engineering physics and thermophysics Vol. 95; no. 2; pp. 428 - 440
• Main Authors: Matvienko, O. V., Martynov, P. S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-03-2022; Springer; Springer Nature B.V
• Subjects: Chemical reactions; Classical Mechanics; Complex Systems; Dissociating gases; Dissociation; Engineering; Engineering Thermodynamics; Fluid flow; Gas flow; Heat and Mass Transfer; Heat transfer; Industrial Chemistry/Chemical Engineering; Nitrogen; Nitrogen oxide; Nitrogen tetroxide; Nuclear energy; Numerical analysis; Reversed flow; Swirling; Thermodynamics; Turbulence; chemical reaction; swirling flow; computational fluid dynamics; heat transfer; dissociation; boundary layer
• ISSN: 1062-0125; 1573-871X
• DOI: 10.1007/s10891-022-02497-9

Results of investigations of the heat transfer in the swirling turbulent flow of dinitrogen tetroxide in a cylindrical channel are presented. The equilibrium stage of the dissociation reaction N
2
O
4
⇄ 2NO
2
was considered. It was established that the mass fraction of N
2
O
4
in its swirling flow is smaller than that in the analogous forward flow at one and the same distance from the input cross section of the channel. In the case where the flow of dinitrogen tetroxide is strongly swirled, its intense heating in the zone of reverse flows near the channel inlet causes it to dissociate. It is shown that an increase in the swirling of a gas flow intensifies the heat transfer in it with increase in its Nusselt number.