Experimental study of heat transfer parameters of impingement heating system represented by conductive target plate of resistive film
The current experimental study focuses on the heat transfer characteristics and pressure losses for impingement system which is used in cooling the liner of gas turbine combustor. Recent experiment method of conductive heat transfer technique with resistive film in the back side target plate is intr...
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Published in | Engineering and Technology Journal Vol. 34; no. 8A; pp. 1588 - 1604 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Baghdad, Iraq
University of Technology
01.08.2016
Unviversity of Technology- Iraq |
Subjects | |
Online Access | Get full text |
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Summary: | The current experimental study focuses on the heat transfer characteristics and
pressure losses for impingement system which is used in cooling the liner of gas
turbine combustor. Recent experiment method of conductive heat transfer technique
with resistive film in the back side target plate is introduced. The present
experimental model measured both the heat transfer coefficient for inner target
surface and the wall cooling effectiveness for outer target surface. To physically
explain the phenomena associated with interaction flow area, a computational fluid
dynamic code (Fluent 14) is employed. The continuity, momentum and energy
equations are computationally solved to analyze the flow field in the jet impingement
area. The tests models of the impingement plate are made from round jet holes of
inline and staggered arrays arrangement with jet to jet spacing of four-hole diameter.
Jet Reynolds numbers of 4200 to 15000 and jet height to diameter ratio of 1.5, 2.0,
and 3.0 are maintained. The inline array, as expected enhanced the wall cooling
effectiveness over that of the staggered array by 10.3% and both jet spacing and
Reynolds number have an evident effect on the discharge
coefficient. Empirical correlations are obtained for both arrays arrangement to predict
the area-averaged Nusselt number as a function of jet governing parameters. |
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ISSN: | 1681-6900 2412-0758 |
DOI: | 10.30684/etj.34.8A.10 |