Numerical Modeling and Optimization of Fluid Flow in Engines

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

Deadline for manuscript submissions: 5 February 2026 | Viewed by 554

Special Issue Editors


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Guest Editor
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Interests: compressible flow; supersonic internal flow; shock wave/boundary layer interaction; flow mechanism; flow control
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Guest Editor
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Interests: dynamic modeling; aeroengine control; hypersonic propulsion

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Guest Editor
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
Interests: supersonic internal flow; scramjet; shock wave/boundary layer interaction; flow control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The internal flow within engines exhibits complex multi-process coupling effects. Current research still lacks a comprehensive understanding of these internal flow characteristics and their interaction mechanisms. These limitations result in insufficient capabilities for monitoring and controlling multi-mode flow conditions, which emphasizes the necessity for deeper investigation into complex flow behaviors and fundamental physical mechanisms within engines. The accurate simulation and optimization of engine flows will enhance understanding of fluid dynamics within engines, leading to more efficient combustion processes, reduced emissions, and improved engine performance. Optimizing fluid flow processes in engines positively contributes to energy efficiency enhancement, sustainable transportation development, and environmental protection.

This Special Issue of Processes covers research on the numerical modeling and optimization of fluid flow in engines. Research topics include, but are not limited to, aeroengines, ramjets, scramjets, variable cycle engines, precooled engines, RBCCs, and TBCCs. The research includes internal flow mechanisms, data-driven modeling aerodynamics, and flow control of the engines.

The topics of the Special Issue include, but are not limited to, the following:

  • Shock wave/boundary layer interaction;
  • Shock wave/vortex coupling interference;
  • Supersonic turbulent flow for chemical equilibrium;
  • Flow controlled supersonic flow;
  • Supersonic rocket nozzle flow;
  • Supersonic impinging jet flow;
  • Shock wave aerothermal and drag reduction;
  • Shock wave/combustion interaction;
  • Flow control methods;
  • Wind tunnel experimental methods;
  • Numerical calculation methods;
  • Flow field prediction;
  • Machine learning in flow modeling and flow control;
  • Flow field feature extraction;
  • Fusion method of multi-source aerodynamic data;
  • Non-Equilibrium thermodynamics;
  • Dynamic modeling;
  • Reduced-order modeling;
  • Integrated propulsion–airframe design;
  • Inlet-Engine matching control.

Dr. Ziao Wang
Dr. Chengkun Lv
Dr. Nan Li
Guest Editors

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Keywords

  • flow mechanism
  • aerodynamics
  • flow control method
  • intelligent fluid dynamics
  • dynamic modeling
  • dynamic modeling
  • multivariable control

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Published Papers (1 paper)

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Research

20 pages, 3671 KB  
Article
Simulation-Based Performance Analysis of Electrically Assisted Turbocharging in Diesel Engine
by Tayfun Ozgur and Kadir Aydin
Processes 2025, 13(9), 2718; https://doi.org/10.3390/pr13092718 - 26 Aug 2025
Viewed by 471
Abstract
This study explores the effects of electrically assisted turbochargers (EAT) on the performance of diesel engines by incorporating an electrical motor/generator into a conventional turbocharged model. The engine simulations were conducted at three different power levels of 2, 2.5, and 3 kW to [...] Read more.
This study explores the effects of electrically assisted turbochargers (EAT) on the performance of diesel engines by incorporating an electrical motor/generator into a conventional turbocharged model. The engine simulations were conducted at three different power levels of 2, 2.5, and 3 kW to assess the impact of electrical assistance. The results demonstrated that EAT significantly boosts engine performance, with an increase in boost pressure of up to 58.9% at 1000 rpm and an average increase of 30.9% across the low engine speed range (1000–2200 rpm). Additionally, the maximum turbocharger speed was achieved at lower engine speeds, dropping from 2400 rpm to as low as 1600 rpm with 3 kW assistance. Engine torque improved by up to 28.2% at 1000 rpm, and brake-specific fuel consumption (BSFC) was reduced by as much as 8.1%. Transient simulations showed notable improvements in response times, with turbo lag reduced by up to 53% under acceleration conditions. Overall, EAT technology provides significant enhancements in engine efficiency, torque output, fuel economy, and transient response, positioning it as a promising solution for improving diesel engine performance, particularly in addressing turbo lag and low-speed inefficiencies. Full article
(This article belongs to the Special Issue Numerical Modeling and Optimization of Fluid Flow in Engines)
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