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Processes
Special Issues
Engine Combustion and Emissions
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Engine Combustion and Emissions

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

Deadline for manuscript submissions: closed (30 November 2024) | Viewed by 8222

Special Issue Editors

Prof. Dr. Longfei Chen

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Guest Editor
School of Energy and Power Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, China
Interests: engineering thermophysics; environmental science and engineering
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Fengshan Liu

E-Mail Website
Guest Editor
Combustion Research Group, Institute for Chemical Process & Environmental Technology, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
Interests: combustion; emission
Prof. Dr. Jean-Louis Consalvi

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Guest Editor
CNRS, IUSTI UMR 7343, Aix-Marseille Université, 5 rue E. Fermi, 13013 Marseille, France
Interests: combustion and emission; engineering thermophysics; numerical modeling
Dr. Zheng Xu

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Guest Editor
School of Aerospace, Hangzhou Innovation Institute, Beihang University, Hangzhou 310023, China
Interests: aerospace engine; engineering thermophysics
Special Issues, Collections and Topics in MDPI journals
Dr. Meiyin Zhu

E-Mail Website
Guest Editor
School of Aerospace, Hangzhou Innovation Institute, Beihang University, Hangzhou 310023, China
Interests: aerospace engine; modeling and control design of altitude ground test facilities; μ synthesis control; model reference adaptive control; bi-objective optimal control

Special Issue Information

Dear Colleagues,

Processes in aerospace power engineering and engineering thermophysics and related processes are popular but complex issues, and research on these is essential to the technical development of aerospace engineering. Processes related to aerospace power, such as combustion and emission, multiphase flow, heat and mass transfer, safety, and airworthiness, have been traditional research hotspots worldwide, and their applications have distinct characteristics and laws from those of other power systems. In addition, the application of digital twin and big data, the impact of pollutants on the environment and climate, as well as other cutting-edge scientific issues that intersect with aerospace power processes have generated novel questions that are currently under exploration. The obvious intersection and combination of traditional and novel research on aerospace power processes will be a significant challenge in the future. Therefore, it is important to discuss and summarize the latest outstanding research on the processes of aerospace power engineering and engineering thermophysics.

The main goal of this special issue is to collect manuscripts focused on frontier studies and future challenges of aerospace power engineering related processes. Relevant topics include, but are not limited to:

  • Carbon neutral and sustainable aviation fuels
  • Aero-engine combustion
  • Aviation emission and atmospheric pollution
  • Particle measurement and characterization
  • Multiphase flow
  • Heat and mass transfer
  • Aerospace power safety and airworthiness
  • Small and micro aerospace power
  • Digital twin and big data in aerospace power

You are welcome to also present your work at “The 1st International Conference on Aerospace Power Engineering and Engineering Thermophysics, Zhongfa Aviation University”.

Prof. Dr. Longfei Chen
Prof. Dr. Fengshan Liu
Prof. Dr. Jean-Louis Consalvi
Dr. Zheng Xu
Dr. Meiyin Zhu
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 papers will be 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. 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 2000 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.

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Published Papers (3 papers)

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Research

14 pages, 4472 KiB  
Article
Monitoring and Characterizing the Flame State of a Bluff-Body Stabilized Burner by Electrical Capacitance Tomography
by Liuyong Chang, Boxuan Cui, Chenglin Zhang, Zheng Xu, Guangze Li and Longfei Chen
Processes 2023, 11(8), 2403; https://doi.org/10.3390/pr11082403 - 10 Aug 2023
Cited by 1 | Viewed by 1034
Abstract
Unstable combustion phenomena such as flame flashback, flame liftoff, extinction and blowout frequently take place during the operation of the bluff-body stabilized burner. Therefore, flame state monitoring is necessary for the safe operation of the bluff-body stabilized burner. In the present study, an [...] Read more.
Unstable combustion phenomena such as flame flashback, flame liftoff, extinction and blowout frequently take place during the operation of the bluff-body stabilized burner. Therefore, flame state monitoring is necessary for the safe operation of the bluff-body stabilized burner. In the present study, an electrical capacitance tomography (ECT) system was deployed to detect the permittivity distribution in the premixing channel and further characterize the flame states of stabilization, flashback, liftoff, extinction and blowout. A calderon-based reconstruction method was modified to reconstruct the permittivity distribution in the annular premixing channel. The detection results indicate that the permittivity in the premixing channel increases steeply when the flame flashback takes place and decreases obviously when the flame lifts off from the combustor rim. Based on the varied permittivity distribution at different flame states, a flame state index was proposed to characterize the flame state in quantification. The flame state index is 0, positive, in the range of −0.64–0, and lower than −0.64 when the flame is at the state of stable, flashback, liftoff and blowout, respectively. The flame state index at the flame state of extinction is the same as that at the flame state of liftoff. The extinction state and the blowout state can be distinguished by judging whether the flame flashback takes place before the flame is extinguished. These results reveal that the ECT system is capable of monitoring the flame state, and that the proposed flame state index can be used to characterize the flame state. Full article
(This article belongs to the Special Issue Engine Combustion and Emissions)
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21 pages, 3168 KiB  
Article
Thermodynamic Optimization of Aircraft Environmental Control System Using Modified Genetic Algorithm
by Qihang Liu, Laihe Zhuang, Jie Wen, Bensi Dong and Zhiwei Liu
Processes 2022, 10(4), 721; https://doi.org/10.3390/pr10040721 - 8 Apr 2022
Cited by 4 | Viewed by 2204
Abstract
This paper presents an optimization method for the civil aircraft environmental control system (ECS) mainly involving two airstreams: the ram airstream for cooling and the bleed airstream for supplying the cabin. The minimum total fuel energy consumption rate (FECR), defined as [...] Read more.
This paper presents an optimization method for the civil aircraft environmental control system (ECS) mainly involving two airstreams: the ram airstream for cooling and the bleed airstream for supplying the cabin. The minimum total fuel energy consumption rate (FECR), defined as the weighted sum of the shaft power extraction and propulsive power loss, is obtained under the precondition of the constant outputs in the cooling capacity and outlet pressure. A modified genetic algorithm (GA) is proposed to acquire the optimal values of the heat transfer areas, temperature ratio of bleed air, mass flow rate of ram air, and pressure ratios of the turbine, compressor, and fan. The statistical results show that the multipoint crossover and continuity improvement implemented in the modified GA improve convergence and distribution performance. The probability of reaching a satisfactory result using modified GA is 62.4% higher than standard GA. Due to the decrease of inlet parameters of bleed air and the elimination of power input in the compressor, the FECR of the optimization case can be lowered by 11.0%. In general, the evaluation method considering energy quality together with the modified optimization technique is proved effective in energy-saving design for such energy systems such as ECS with multiple inputs and outputs. Full article
(This article belongs to the Special Issue Engine Combustion and Emissions)
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16 pages, 47414 KiB  
Article
Quasi-One-Dimensional Flow Modeling for Flight Environment Simulation System of Altitude Ground Test Facilities
by Xitong Pei, Jiashuai Liu, Xi Wang, Meiyin Zhu, Louyue Zhang and Zhihong Dan
Processes 2022, 10(2), 377; https://doi.org/10.3390/pr10020377 - 16 Feb 2022
Cited by 11 | Viewed by 2427
Abstract
The Flight Environment Simulation System (FESS) at Altitude Ground Test Facilities (AGTF) is used to test aircraft engines. The FESS model is the basis of research and verification of advanced control algorithms. To further improve the steady and dynamic accuracy of the FESS [...] Read more.
The Flight Environment Simulation System (FESS) at Altitude Ground Test Facilities (AGTF) is used to test aircraft engines. The FESS model is the basis of research and verification of advanced control algorithms. To further improve the steady and dynamic accuracy of the FESS model, a modeling method based on quasi-one-dimensional flow is proposed. Firstly, based on the unified inlet/outlet boundary specifications, the component models of test equipment, such as the quasi-one-dimensional flow model of pipe, the regulating valve model considering the heat transfer process, the multi-inlet and multi-outlet volume model reflecting the mixing characteristics of air flow, and the air source model and engine model, were established. Secondly, according to the real structure and working mechanism of the FESS, the above component models were used to build the numerical simulation model of the FESS. The simulation results showed that the relative deviation of mass flow and pressure were less than 4.4% and 0.9%, respectively, which verifies the correctness of the modeling method. In addition, the PI controller was designed for the FESS, and the simulation results show that the model is able to support controller development and verification. Full article
(This article belongs to the Special Issue Engine Combustion and Emissions)
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