Control of Injector Spray Characteristics and Synthetic Fuels

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: closed (12 January 2024) | Viewed by 2673

Special Issue Editors


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Guest Editor
Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 3058564, Japan
Interests: fuel spray; internal combustion engine; fluid dynamics
Special Issues, Collections and Topics in MDPI journals
School of Automotive Studies, Tongji University, Shanghai 201804, China
Interests: fluid dynamics; optic diagnostics; synchrotron X-ray imaging

Special Issue Information

Dear Colleagues,

Internal combustion engines (ICEs) face significant technical challenges due to the worldwide demand for CO2 emission reduction. However, the ICEs' CO2 emissions do not result from ICEs but from burning fossil fuels. Improving the energy efficiency of ICEs can directly contribute to CO2 emission reduction using fossil fuels. Furthermore, using synthetic fuels/E-fuels, otherwise known as carbon neutral fuels, as an alternative to fossil fuels has the potential to lower the ICEs' CO2 emissions close to zero. Therefore, it is necessary to consider further improving the energy efficiency of ICEs. One of the vital technologies is realizing the optimal control of injector spray characteristics and the increasing use of synthetic fuels.

As Guest Editor of the Energies Special Issue on "Control of Injector Spray Characteristics and Synthetic Fuels", I invite you to submit your relevant work in the field for consideration. This Special Issue will represent a unique opportunity to gather the most recent advances in the field, both from the numerical modeling and experimental characterization sides.

The topics of the Special Issue include (but are not limited to):

  • Spray characterization of conventional and synthetic fuels;
  • Synthetic fuels in automotive vehicles;
  • Spray combustion in engine-like conditions
  • Spray characterization in optically accessible engines;
  • Numerical modeling of spray characteristics;
  • Experimental and numerical characterization of flow characteristics inside injectors.

Dr. Weidi Huang
Dr. Ya Gao
Guest Editors

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. Processes 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 2400 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

  • fuel spray
  • synthetic fuels
  • spray break-up
  • nozzle internal flow
  • computational fluid dynamics

Published Papers (2 papers)

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Research

23 pages, 10617 KiB  
Article
Operating and Thermal Efficiency Boundary Expansion of Argon Power Cycle Hydrogen Engine
by Weiqi Ding, Jun Deng, Chenxu Wang, Renjie Deng, Hao Yang, Yongjian Tang, Zhe Ma and Liguang Li
Processes 2023, 11(6), 1850; https://doi.org/10.3390/pr11061850 - 19 Jun 2023
Cited by 4 | Viewed by 1191
Abstract
The efficiency enhancement of argon power cycle engines through theoretical means has been substantiated. However, the escalation of in-cylinder temperatures engenders abnormal combustion phenomena, impeding the augmentation of compression ratios and practical efficiency. This study presents a comprehensive investigation employing experimental and simulation [...] Read more.
The efficiency enhancement of argon power cycle engines through theoretical means has been substantiated. However, the escalation of in-cylinder temperatures engenders abnormal combustion phenomena, impeding the augmentation of compression ratios and practical efficiency. This study presents a comprehensive investigation employing experimental and simulation techniques, aiming to extend the boundaries of thermal efficiency and operational capabilities for hydrogen-powered argon cycle engines. The impact of hydrogen direct injection, intake boost, and port water injection is evaluated in conjunction with an argon power cycle hydrogen engine. The hydrogen direct injection, particularly at an engine speed of 1000 rpm, significantly increases the indicated mean effective pressure from 0.39 MPa to 0.72 Mpa, surpassing the performance of the port hydrogen injection. Manipulating the hydrogen direct injection timing results in the formation of a stratified mixture, effectively attenuating the combustion rate, and resolving the issue of excessively rapid hydrogen combustion within an Ar/O2 environment. The implementation of super lean combustion, combined with intake-boosting, achieves a maximum gross indicated thermal efficiency of 57.89%. Furthermore, the port water injection proves to be an effective measure against knock, broadening the operational range of intake-boosted conditions. Notably, the maximum gross indicated thermal efficiency recorded for the port water injection group under intake-boosted conditions reaches 59.35%. Full article
(This article belongs to the Special Issue Control of Injector Spray Characteristics and Synthetic Fuels)
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17 pages, 14746 KiB  
Article
Influence of Internal Structural Parameters on the Inner Flow and Outer Spray Characteristics for Feedback-Free Fluidic Oscillator
by Zhijun Wu, Pengfei Leng, Yu Gao, Wenbo Zhao, Zongjie Hu, Xiangxiang Lu, Rongzhu Shi, Wei Xie and Liguang Li
Processes 2023, 11(5), 1364; https://doi.org/10.3390/pr11051364 - 29 Apr 2023
Cited by 1 | Viewed by 1154
Abstract
Feedback-free fluidic oscillators, relying on the interaction of jets to oscillate, have a wide range of operation frequencies and no moving parts, which is promising for future applications. In this paper, the sweep angle, oscillation frequency, and volume flow rate of the feedback-free [...] Read more.
Feedback-free fluidic oscillators, relying on the interaction of jets to oscillate, have a wide range of operation frequencies and no moving parts, which is promising for future applications. In this paper, the sweep angle, oscillation frequency, and volume flow rate of the feedback-free fluidic oscillator with a cavity width of 4.6 mm were measured experimentally, and the sweeping mechanism was analyzed based on the internal flow simulation. The influence of the impact angle, cavity exit width, and shoulder radius on the internal flow and external spray characteristics was analyzed by the numerical method. The results show that the sweep angle and oscillation frequency are affected throughout the increase in impact angle from 80° to 120°. However, only when the SR is greater than 0.88 mm does the internal flow and spray state change significantly. The volume flow rate is mainly affected by the cavity exit width and increases linearly from 5.3 mL/s to 9.3 mL/s as the width increases from 0.45 mm to 0.85 mm. It can be surmised that the sweep angle is approximately linear with the distance between the hit point and the impact cavity centerline. Full article
(This article belongs to the Special Issue Control of Injector Spray Characteristics and Synthetic Fuels)
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