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Main Title: Shockless explosion combustion
Subtitle: an innovative way of efficient constant volume combustion in gas turbines
Author(s): Bobusch, Bernhard C.
Berndt, Phillip
Paschereit, Christian Oliver
Klein, Rupert
Type: Article
Language Code: en
Abstract: Constant volume combustion (CVC) in gas turbines is a promising way to achieve a step change in the efficiency of such systems. The most widely investigated technique to implement CVC in gas turbine systems is pulsed detonation combustion (PDC). Unfortunately, the PDC is associated with several disadvantages, such as sharp pressure transitions, entropy generation due to shock waves, and exergy losses due to kinetic energy. This work proposes a new way to implement CVC in a gas turbine combustion system: shockless explosion combustion (SEC). This technique utilizes acoustic waves inside the combustor to fill and purge the combustion tube. The combustion itself is controlled via the ignition delay time of the fuel-air mixture. By adjusting the ignition delay in a way such that the entire fuel-air volume undergoes homogeneous auto-ignition, no shock waves occur. Accordingly, the losses associated with a detonation wave are not present in the proposed system. Instead, a smooth pressure rise is created due to the heat release of the homogeneous combustion. The current paper explains the SEC process in detail, and presents the identified challenges. Solutions to these challenges and the numerical and experimental approach are presented subsequently alongside with first preliminary results of the numerical studies.
Issue Date: 30-Sep-2014
Date Available: 11-Nov-2015
DDC Class: 510 Mathematik
Subject(s): constant volume combustion
shockless explosion combustion
gas turbines
homogeneous auto-ignition
pressure gain combustion
pulsed detonation engines
Sponsor/Funder: DFG, SFB 1029, Substantial efficiency increase in gas turbines through direct use of coupled unsteady combustion and flow dynamics
Journal Title: Combustion science and technology
Publisher: Taylor & Francis
Publisher Place: London
Volume: 186
Issue: 10-11
Publisher DOI: 10.1080/00102202.2014.935624
Page Start: 1680
Page End: 1689
EISSN: 1563-521X
ISSN: 0010-2202
Notes: This is an Accepted Manuscript of an article published by Taylor & Francis in Combustion Science and Technology on 30/09/2014, available online:
Appears in Collections:SFB 1029 - TurbIn » Publications

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