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http://dx.doi.org/10.6108/KSPE.2012.16.2.042

Comparative Studies of Heat Transfer Coefficients for Rocket Nozzle  

Hahm, Hee-Cheol (국방과학연구소 1기술연구본부 6부)
Kang, Yoon-Goo (국방과학연구소 1기술연구본부 6부)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.2, 2012 , pp. 42-50 More about this Journal
Abstract
The goal of heat transfer studies is the accurate prediction of temperature and heat flux distribution on material boundaries. To this purpose, general-purpose computational fluid dynamics(CFD) code is used : FLUENT. Mass fluxes and pressure ratio are calculated for two types of nozzle. The comparative studies reveal that the computational results are in agreement with the experimental data. Also, heat transfer coefficients from FLUENT for one type of nozzle are very similar and agree well with the experimental data in the diverging part of the nozzle, but the calculated results are large in the converging part. The heat transfer coefficients from Bartz equation are over-predicted. We can consider various reasons for these differences, i.e., laminarization by the highly accelerated flow in the nozzle, turbulent flow model and grid generation.
Keywords
Turbulent Flow; Bartz Equation; Acceleration Parameter; Heat Transfer Coefficient; Laminarization;
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  • Reference
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