Engineering Mechanics

Proceedings Vol. 12 (2006)

ENGINEERING MECHANICS 2006

Copyright © 2006 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, Prague

 

S. Veselý
pages 414 - +11p., full text

The flame tube separating the air stream area from the area, in which the combustion takes place, is a very important part of the combustor design. The flame tube separates the air along the combustion space while on its border an air loss pL develops, which corresponds to the velocity of air streams from the flame tube edge to the combustion and mixing space. The flame tube is exposed to radiating heat flow from the flame to the flame tube wall and this flow can achieve the values E = 300 – 500 kWm-2. A method of heat exchange between the flame and the flame tube wall was elaborated and some results are shown in 1 . With regard to the high radiating heat flows from the flame to the flame tube, it is inevitable to cool down the flame tube walls. One of the methods is film cooling, during which a strong axial non-uniformity of the temperature field of the wall material develops. The paper analyses one design variant of film cooling of the flame tube wall and its impact on the formation of temperature stresses.

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