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Special Issue "Thermal Management and Experimental Techniques for a Sustainable Mobility"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "E: Thermal Management".

Deadline for manuscript submissions: closed (15 January 2021) | Viewed by 1935

Special Issue Editors

Prof. Dr. Alberto Broatch
E-Mail Website
Guest Editor
CMT–Motores Térmicos, Universitat Politècnica de València, 46022 Valencia, Spain
Interests: thermo- and fluid-dynamics in thermal engines; thermal management in propulsive systems; noise control; experimental techniques for fluid and heat flow systems
Special Issues, Collections and Topics in MDPI journals
Dr. Jorge GARCÍA-TÍSCAR
E-Mail
Co-Guest Editor
CMT-Motores Térmicos, Universitat Politècnica de València, Valencia, Spain
Interests: Experimental and numerical aeroacoustics in propulsive systems, heat transfer and fluid-structure interaction analysis in aerospace and automotive engineering

Special Issue Information

Dear Colleagues,

Climate change is the key environmental problem of the coming decades. To face this challenge, fuel consumption must be reduced in the transport industry by developing new technologies. Electrification is one of the main current actions to achieve this reduction in road transport, as EU Horizon 2030 targets foresee a 40% reduction in CO2 emissions per km. A definition of integrated thermal systems that would allow meeting the temperature needs of hybrid and pure-electric powertrains is currently a challenging topic. Although hybrid aircraft prototypes exist, in air transport focus is put on improved geared turbofan engines with UHBRs (Ultra High By-pass Ratios). These new-generation engines require innovative thermal management strategies to cope with increased heat generation.

In these technologies, thermal management plays a crucial role for achieving solutions that meet the current decarbonized transport challenge. Therefore, the development of both reliable numerical methodologies and experimental techniques for thermal management assessment of propulsive systems is of the upmost importance in the pursuit of sustainable mobility.

We kindly invite you to submit your work related to the field of “Thermal management and experimental techniques for a sustainable mobility” for consideration for publication. This Special Issue represents an opportunity to gather the most recent advances in this field with application to both road and air transportation.

Prof. Dr. Alberto Broatch
Dr. Jorge GARCÍA-TÍSCAR
Guest Editors

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. Energies is an international peer-reviewed open access semimonthly 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 2200 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

  • Thermal management
  • Experimental techniques
  • Hybridization
  • Numerical methodologies
  • Air transport
  • Road transport
  • Fuel consumption
  • Heat exchange

Published Papers (2 papers)

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Research

Article
A Passive Control Method of Hub Corner Stall in a 1.5-Stage Axial Compressor under Low-Speed Conditions
by , , and
Energies 2020, 13(11), 2691; https://doi.org/10.3390/en13112691 - 27 May 2020
Cited by 2 | Viewed by 781
Abstract
Since the use of the compressor of a ship gas turbine is unavoidable at a low-speed operation, the flow field characteristics and stall mechanism at off-design speeds are important aspects for compressor designers. In this study, the first 1.5 stages of an eight-stage [...] Read more.
Since the use of the compressor of a ship gas turbine is unavoidable at a low-speed operation, the flow field characteristics and stall mechanism at off-design speeds are important aspects for compressor designers. In this study, the first 1.5 stages of an eight-stage compressor are numerically simulated. The mechanism of compressor rotor instability at lower speeds is identified. The characteristic lines of compressors with various partial clearance are calculated at low speed (0.6 N). The flow field of the same outlet pressure (near stall point of the original compressor without clearance) is compared and analyzed. The results show that, at the near stall point, the suction surface separation and backflow occur in the main flow of the rotor top. It develops along the blade span and finally blocks the flow passage of the rotor, which results in the compressor stall. At the same time, the stall also occurs at the corner of the stator hub. In this paper, the characteristics of partial clearance in four different positions of the stator hub are analyzed. The near stall point and the working point are selected for the flow field analysis. It is concluded that the radial development of the stall vortex on the suction surface of the stator can be restrained by the partial clearance at the stator. In this paper, a passive control method by partial clearance is used in the real compressors, which is different from previous studies on cascades. The margin increases at low speeds. Full article
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Article
Numerical Analysis of Aerodynamic Characteristics of Exhaust Passage with Consideration of Wet Steam Effect in a Supercritical Steam Turbine
Energies 2020, 13(7), 1560; https://doi.org/10.3390/en13071560 - 27 Mar 2020
Viewed by 977
Abstract
To investigate the aerodynamic performance of exhaust passage under multi-phase flow, an actual case is conducted in the low-pressure double exhaust passages of 600 MW steam turbine. Then, the flow field is compared and analyzed with and without the built-in extraction pipelines based [...] Read more.
To investigate the aerodynamic performance of exhaust passage under multi-phase flow, an actual case is conducted in the low-pressure double exhaust passages of 600 MW steam turbine. Then, the flow field is compared and analyzed with and without the built-in extraction pipelines based on the Eulerian–Eulerian homogenous medium multiphase method. Results show that the upstream swirling flow and downstream mixed swirling flow are the main causes to induce the entropy-increase in the exhaust passage. Moreover, the flow loss and static-pressure recovery ability in the exhaust hood are greater than those in the condenser neck. Compared with the flow field without the steam extraction pipelines, the entropy-increase increases, the static pressure recovery coefficient decreases, and the spontaneous condensation rates of wet steam decrease in the downstream area of the pipelines. With the increase of steam turbine loads, an increment in entropy-increase in the exhaust passage is 0.98 J/(kg·K) lower than that without steam extraction pipelines. Moreover, the incrementing range of uniformity coefficient is increased from 14.5% to 40.9% at the condenser neck outlet. It can be concluded that the built-in exhaustion pipeline can improve the aerodynamic performance of exhaust passage and better reflect the real state of the flow field. These research results can serve as a reference for turbine passage design. Full article
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