Comparative study of performance of heat exchangers used in hypersonic wind tunnels

During the modernization of the TsAGI hypersonic wind tunnel, which implied an increase in the limiting values of stagnation parameters, and, consequently, the heat load, the operation of the main air cooler structures was analyzed. Two qualitatively different options are considered: Option-1, in wh...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-12, Vol.1683 (2), p.22029
Main Authors: Drozdov, S M, Rtishcheva, A S
Format: Article
Language:English
Subjects:
Aerodynamics
Air flow
Comparative studies
Computational fluid dynamics
Cooling
Diffusers
Heat exchangers
Heat transmission
Hypersonic wind tunnels
Mathematical models
Model testing
Modernization
Nozzles
Physics
Spalart-Allmaras turbulence model
Tubes
Turbulence models
Turbulent flow
Water circulation
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Summary:During the modernization of the TsAGI hypersonic wind tunnel, which implied an increase in the limiting values of stagnation parameters, and, consequently, the heat load, the operation of the main air cooler structures was analyzed. Two qualitatively different options are considered: Option-1, in which the flow moves in a large number of longitudinal tubes placed in a common compartment with cooling water circulating in the intertube area, and Option-2, that is a bundle of tubes (tubes of circular or elliptical section were considered) containing a moving cooler (water), and the air flow transversely moves in the intertube gaps. In the study, a previously worked out and experimentally verified approach to numerical simulation was implemented, according to which a through calculation of the flow and heat transfer was carried out in all areas of the duct with cooled walls (prechamber, nozzle, test section, diffuser) and a cooling compartment for the mode p0=12 atm; T0=5000 K; M≈7. The ANSYS FLUENT software package solved axisymmetric Navier-Stokes equations for viscous and heat-conducting gas using the Spalart-Allmaras turbulence model. For the flow in the area of the cooling compartment, the simplified Darcy's model and the model of the "schematized axisymmetric tube bundle" were considered.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1683/2/022029