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Energies
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Future Fuel Technologies and Advanced Research on Turbulent Combustion
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Future Fuel Technologies and Advanced Research on Turbulent Combustion

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I2: Energy and Combustion Science".

Deadline for manuscript submissions: 20 December 2024 | Viewed by 562

Special Issue Editor

Prof. Dr. Jian Zhang

E-Mail Website
Guest Editor
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
Interests: turbulent combustion; multiphase combustion; multiphase flow

Special Issue Information

Dear Colleagues,

To achieve carbon neutrality, future fuels will increasingly shift towards low-carbon and zero-carbon alternatives, including hydrogen, ammonia, methanol, and biomass fuels. Novel combustion technologies should be developed to suit this major change from conventional fossil fuels to green alternatives. Most practical combustion devices display turbulent combustion processes, firing both fossil and green fuels. A better understanding of the characteristics of turbulent combustion will be beneficial to the design and optimization of novel combustion devices firing various alternative green fuels. This Special Issue aims to present recent advances in combustion technology for alternative green fuels, including theoretical, numerical, and experimental studies on the turbulent combustion of either fossil or green fuels.

Prof. Dr. Jian Zhang
Guest Editor

Manuscript Submission Information

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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.

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Keywords

  • combustion technology
  • alternative green fuels
  • turbulent combustion
  • theoretical analysis
  • numerical simulation
  • experimental study

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Published Papers (1 paper)

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Research

21 pages, 5049 KiB  
Article
A Novel Fuel-Based CO2 Transcritical Cycle for Combined Cooling and Power Generation on Hypersonic Aircrafts
by Yijian He, Lisong Wang, Jiaqi Dong and Qifei Chen
Energies 2024, 17(19), 4853; https://doi.org/10.3390/en17194853 - 27 Sep 2024
Viewed by 434
Abstract
This study focuses on the great challenges for combined cooling and power supply on hypersonic aircrafts. To address the issues of low thermal efficiency and high fuel consumption of heat sink by the existing CO2 supercritical Brayton cycle, a novel fuel-based CO [...] Read more.
This study focuses on the great challenges for combined cooling and power supply on hypersonic aircrafts. To address the issues of low thermal efficiency and high fuel consumption of heat sink by the existing CO2 supercritical Brayton cycle, a novel fuel-based CO2 transcritical cooling and power (FCTCP) system is constructed. A steady-state simulation model is built to investigate the impacts of combustion chamber wall temperatures and fuel mass flow rates on the FCTCP system. Thermal efficiency of the CO2 transcritical cycle reaches 25.2~32.8% under various combustion chamber wall outlet temperatures and endothermic pressures. Compared with the supercritical Brayton cycle, the thermal efficiency of novel system increases by 54.5~80.9%. It is found from deep insights into the thermodynamic results that the average heat transfer temperature difference between CO2 and fuel is effectively reduced from 153.4 K to 16 K by split cooling of the fuel in the FCTCP system, which greatly enhances the matching of CO2–fuel heat exchange temperatures and reduces the heat exchange loss of the system. Thermodynamic results also show that, in comparison to the supercritical Brayton cycle, the cooling capacity and power generation per unit mass flow rate of working fluid in the FCTCP system increased by 75.4~80.8% and 12.9~51.6%, respectively. The FCTCP system exhibits a substantial performance improvement, significantly enhancing the key characteristic index of the combined cooling and power supply system. This study presents a novel approach to solving the challenges of cooling and power supply in hypersonic aircrafts under limited fuel heat sink conditions, laying the groundwork for further exploration of thermal management technologies of hypersonic aircrafts. Full article
(This article belongs to the Special Issue Future Fuel Technologies and Advanced Research on Turbulent Combustion)
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