THERMAL SCIENCE

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Thermal Science - Online First

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Khaled Bensayah

,

Khadidja Kamri

online first only

Computational modeling of heat transfer and flow separation in supersonic cooled nozzles: Parametric study

ABSTRACT
Flow separation is necessary for the construction of a rocket engine nozzle. Regenerative cooling is one of the most significant criteria for the safety of wall nozzles because of the high temperature and pressure in the thrust chamber. A review of a comprehensive numerical investigation of the boundary layer separation and heat transfer in a 30°−15° cooled nozzle is presented. The accuracy of the SST-V turbulence model in this study was numerically investigated. For this purpose and for a wide range of chamber conditions, the effects of various parameters, such as wall temperature, turbulent Prandtl number, and constant specific heat ratio vary from 1.31 to 1.4 for constant fluid properties for N2O, CH4, Cl2, and air, respectively. The variable specific heat ratio ranged from 1.39 to 1.66 for variable fluid properties for air, CH4, O2 and Helium, respectively, and we investigated how various parameters impact the position of flow separation and local wall heat transfer.
KEYWORDS
separation location, heat transfer, compressible flow, Regenerative nozzle cooling, High temperature flows
PAPER SUBMITTED: 2023-05-13
PAPER REVISED: 2023-07-30
PAPER ACCEPTED: 2023-08-05
PUBLISHED ONLINE: 2024-04-13
DOI REFERENCE: https://doi.org/10.2298/TSCI230513068B
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Computational modeling of heat transfer and flow separation in supersonic cooled nozzles: Parametric study