Abstract
The Heat transfer is one of the most serious challenges that exist in a supersonic nozzle flow. The combustion chamber wall and the nozzle are exposed to high-temperature gases during combustion and gas expansion, which can eventually lead to structural failure. This paper reports a computational study of steady and transient conjugate heat transfer in regenerative water cooled nozzle. Numerical computation solved Reynolds-averaged equations based on RSM-Omega turbulence model coupling with solid-phase heat conduction equation and with coolant-phase. The effect of four inlet cooled approach length 0 inch, 6 inch, 12 inch and 18 inch are studied and validated against the experiments available data. The gas-side wall temperature is also provided by numerical simulations, which show excellent agreement with experimental data. It is concluded that cooling the entire inlet-length is required when using high combustion gases and that when using moderate temperatures, the longer cooled length gives a lower maximum temperature located just upstream of the nozzle throat. Contours of temperature of transient study are presented for 5.18 bar and 10 bar inlet gas stagnation pressure and for different coolant mass flow rate. This study analyse in detail the effect of heating on the skin friction coefficient and wall heat transfer. A qualitative effect of wall cooling was obtained from the calculated values of the thickness of displacement, of momentum and of energy was presented.
Recommended Citation
bensayah, khaled and Kamri, khadidja
(2023)
"Steady and Transient Study of Conjugate Heat Transfer in Regenerative Cooled Nozzle,"
Emirates Journal for Engineering Research: Vol. 29:
Iss.
1, Article 1.
Available at:
https://scholarworks.uaeu.ac.ae/ejer/vol29/iss1/1
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