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Radiative heat transfer analysis in modern rocket combustion chambers

Content Provider	Springer Nature Link
Author	Goebel, Florian Kniesner, Björn Frey, Manuel Knab, Oliver Mundt, Christian
Copyright Year	2014
Abstract	Radiative heat transfer is analyzed for subscale and fullscale rocket combustion chambers for H$_{2}$/O$_{2}$ and CH$_{4}$/O$_{2}$ combustion using the P1 radiation transport model in combination with various Weighted Sum of Gray Gases Models (WSGGMs). The influence of different wall emissivities, as well as the results using different WSGGMs, the size of the combustion chamber and the coupling of radiation and fluid dynamics, is investigated. Using rather simple WSGGMs for homogeneous systems yields similar results as using sophisticated models. With models for nonhomogeneous systems the radiative wall heat flux (RWHF) decreases by 25–30 % for H$_{2}$/O$_{2}$ combustion and by almost 50 % for CH$_{4}$/O$_{2}$ combustion. Enlarging the volume of the combustion chamber increases the RWHF. The influence of radiation on the flow field is found to be negligible. The local ratio of RWHF to total wall heat flux shows a maximum of 9–10 % for H$_{2}$/O$_{2}$ and 8 % for CH$_{4}$/O$_{2}$ combustion. The integrated heat load ratio is around 3 % for H$_{2}$/O$_{2}$ and 2.5 % for CH$_{4}$/O$_{2}$ combustion. With WSGGMs for nonhomogeneous systems, the local ratio decreases to 5 % (H$_{2}$/O$_{2}$) and 3 % (CH$_{4}$/O$_{2}$) while the integrated ratio is only 2 % (H$_{2}$/O$_{2}$) and 1.3 % (CH$_{4}$/O$_{2}$).
Starting Page	79
Ending Page	98
Page Count	20
File Format	PDF
ISSN	18682502
Journal	CEAS Space Journal
Volume Number	6
Issue Number	2
e-ISSN	18682510
Language	English
Publisher	Springer Vienna
Publisher Date	2014-01-24
Publisher Institution	Council of European Aerospace Societies
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Heat transfer Radiative heat transfer Gas radiation CFD Rocket combustion chamber Aerospace Technology and Astronautics
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

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