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contributor authorNeumann, Nicolai
contributor authorBerthold, Arne
contributor authorHaucke, Frank
contributor authorPeitsch, Dieter
contributor authorStathopoulos, Panagiotis
date accessioned2022-02-06T05:53:05Z
date available2022-02-06T05:53:05Z
date copyright4/26/2021 12:00:00 AM
date issued2021
identifier issn0889-504X
identifier otherturbo_143_7_071016.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4278977
description abstractPerformance improvements of conventional gas turbines are becoming increasingly difficult and costly to achieve. Pressure gain combustion (PGC) has emerged as a promising technology in this respect, due to the higher thermal efficiency of the respective ideal gas turbine cycle. Previous cycle analyses considering turbine cooling methods have shown that the application of pressure gain combustion may require more turbine cooling air. This has a direct impact on the cycle efficiency and reduces the possible efficiency gain that can potentially be harvested from the new combustion technology. Novel cooling techniques could unlock an existing potential for a further increase in efficiency. Such a novel turbine cooling approach is the application of pulsed impingement jets inside the turbine blades. In the first part of this paper, results of pulsed impingement cooling experiments on a curved plate are presented. The potential of this novel cooling approach to increase the convective heat transfer in the inner side of turbine blades is quantified. The second part of this paper presents a gas turbine cycle analysis where the improved cooling approach is incorporated in the cooling air calculation. The effect of pulsed impingement cooling on the overall cycle efficiency is shown for both Joule and PGC cycles. In contrast to the authors’ anticipation, the results suggest that for relevant thermodynamic cycles pulsed impingement cooling increases the thermal efficiency of Joule cycles more significantly than it does in the case of PGC cycles. Thermal efficiency improvements of 1.0 p.p. for pure convective cooling and 0.5 p.p. for combined convective and film with TBC are observed for Joule cycles. But just up to 0.5 p.p. for pure convective cooling and 0.3 p.p. for combined convective and film cooling with TBC are recorded for PGC cycles.
publisherThe American Society of Mechanical Engineers (ASME)
titlePulsed Impingement Turbine Cooling and Its Effect on the Efficiency of Gas Turbines With Pressure Gain Combustion
typeJournal Paper
journal volume143
journal issue7
journal titleJournal of Turbomachinery
identifier doi10.1115/1.4050361
journal fristpage071016-1
journal lastpage071016-8
page8
treeJournal of Turbomachinery:;2021:;volume( 143 ):;issue: 007
contenttypeFulltext


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