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Numerical Analysis of the stability and operation of an acial compressor connected to an array of pulsed detonation combustors

Dittmar, Louise and Stathopoulos, Panagiotis (2020) Numerical Analysis of the stability and operation of an acial compressor connected to an array of pulsed detonation combustors. In: ASME Turbo Expo 2020 Turbomachinery Technical Conference and Exposition. ASME Turbo Expo 2020 Turbomachinery Technical Conference and Exposition, 21.-25.09.2020, Online-Veranstaltung. doi: 10.1115/1.4049188.

Full text not available from this repository.

Abstract

Any outlet restriction downstream of Pressure Gain Combustion (PGC), such as turbine blades, affects its flow field and may cause additional thermodynamic losses. The unsteadiness in the form of pressure, temperature and velocity vector fluctuations has a negative impact on the operation of conventional turbines. Additionally, experimental measurements and data acquisition present researchers with challenges that have to do mostly with the high temperature exhaust of PGC and the high frequency of its operation. Nevertheless, numerical simulations can provide important insights into PGC exhaust flow and its interaction with turbine blades. In this paper, a Rotating Detonation Combustor (RDC) and a row of nozzle guide vanes have been modeled based on the data from literature and an available experimental setup. URANS simulations were done for five guide vane configurations with different geometrical parameters to investigate the effect of solidity and blade type representing different outlet restrictions on the RDC exhaust flow. The results analyzed the connection between total pressure loss and the vanes solidity and thickness to chord ratio. It is observed that more than 57% of the upstream velocity angle fluctuation amplitude was damped by the vanes. Furthermore, the area reduction was found to be the significant driving factor for damping the velocity angle fluctuations, whether in the form of solidity or thickness on chord ratio increment. This RDC exhaust flow investigation is an important primary step from a turbomachinery standpoint, which provided details of blade behavior in such an unsteady flow field.

Item URL in elib:https://elib.dlr.de/139741/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical Analysis of the stability and operation of an acial compressor connected to an array of pulsed detonation combustors
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Dittmar, LouiseTechnical University of BerlinUNSPECIFIED
Stathopoulos, PanagiotisPanagiotis.Stathopoulos (at) dlr.deUNSPECIFIED
Date:2020
Journal or Publication Title:ASME Turbo Expo 2020 Turbomachinery Technical Conference and Exposition
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1115/1.4049188
Status:Published
Keywords:gas turbines, compressors, pressure gain combustion, 1-D CFD, stability analysis, Pulsed detonation combustion
Event Title:ASME Turbo Expo 2020 Turbomachinery Technical Conference and Exposition
Event Location:Online-Veranstaltung
Event Type:international Conference
Event Dates:21.-25.09.2020
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Other
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Low-Carbon Industrial Processes (old)
Location: Cottbus
Institutes and Institutions:Institute of Low-Carbon Industrial Processes
Deposited By: Klinkmüller, Maike
Deposited On:04 Jan 2021 11:07
Last Modified:04 Jan 2021 11:07

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