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Fluids
Special Issues
Gas Turbines: Design, Diagnosis and Performance
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Gas Turbines: Design, Diagnosis and Performance

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Turbulence".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 4563

Special Issue Editor

Dr. Nikolaos Aretakis

E-Mail Website
Guest Editor
Laboratory of Thermal Turbomachines, National Technical University of Athens, 15780 Zografou, Athens, Greece
Interests: engine monitoring and fault diagnosis for gas turbines; turbomachinery design; experimental techniques and unsteady phenomena in turbomachines; performance and vibration measurements and analysis in turbomachines; aircraft mission analysis and flight profile optimization

Special Issue Information

Dear Colleagues,

Gas turbines are used in a wide variety of applications—from jet engines to large-scale power generation. Each application presents its own particular set of challenges for gas turbine design and mode of operation. Regardless of the application, these machines are susceptible to performance deterioration and various faults due to their harsh working environment. In order to increase or maintain their safety, availability, and high efficiency, it is necessary to develop methods for component design, performance modeling, health monitoring, fault diagnosis, prognosis, and performance optimization.

The Special Issue of Fluids, “Gas Turbines: Design, Diagnosis and Performance”, aims to cover recent advances in the design, modeling, optimization, monitoring, and diagnosis of gas turbine performance in all kinds of applications.

Dr. Nikolaos Aretakis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fluids is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • gas turbine
  • design
  • modeling
  • optimization
  • monitoring and diagnosis

Published Papers (1 paper)

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Research

17 pages, 5387 KiB  
Article
Design Considerations of Low Bypass Ratio Mixed Flow Turbofan Engines with Large Power Extraction
by Daniel Rosell and Tomas Grönstedt
Fluids 2022, 7(1), 21; https://doi.org/10.3390/fluids7010021 - 01 Jan 2022
Cited by 3 | Viewed by 3780
Abstract
The possibility of extracting large amounts of electrical power from turbofan engines is becoming increasingly desirable from an aircraft perspective. The power consumption of a future fighter aircraft is expected to be much higher than today’s fighter aircraft. Previous work in this area [...] Read more.
The possibility of extracting large amounts of electrical power from turbofan engines is becoming increasingly desirable from an aircraft perspective. The power consumption of a future fighter aircraft is expected to be much higher than today’s fighter aircraft. Previous work in this area has concentrated on the study of power extraction for high bypass ratio engines. This motivates a thorough investigation of the potential and limitations with regards to performance of a low bypass ratio mixed flow turbofan engine. A low bypass ratio mixed flow turbofan engine was modeled, and key parts of a fighter mission were simulated. The investigation shows how power extraction from the high-pressure turbine affects performance of a military engine in different parts of a mission within the flight envelope. An important conclusion from the analysis is that large amounts of power can be extracted from the turbofan engine at high power settings without causing too much penalty on thrust and specific fuel consumption, if specific operating conditions are fulfilled. If the engine is operating (i) at, or near its maximum overall pressure ratio but (ii) further away from its maximum turbine inlet temperature limit, the detrimental effect of power extraction on engine thrust and thrust specific fuel consumption will be limited. On the other hand, if the engine is already operating at its maximum turbine inlet temperature, power extraction from the high-pressure shaft will result in a considerable thrust reduction. The results presented will support the analysis and interpretation of fighter mission optimization and cycle design for future fighter engines aimed for large power extraction. The results are also important with regards to aircraft design, or more specifically, in deciding on the best energy source for power consumers of the aircraft. Full article
(This article belongs to the Special Issue Gas Turbines: Design, Diagnosis and Performance)
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