Vortex Flow Phenomena and Physics of Aerospace Engineering Applications (2nd Edition)

A special issue of Aerospace (ISSN 2226-4310). This special issue belongs to the section "Aeronautics".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1021

Special Issue Editors


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Guest Editor
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
Interests: vortex dynamics; flow mechanisms; vortex rings; impinging jets; jet mixing enhancements; flow control
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Guest Editor
Centre For Aerodynamics & Propulsion, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore
Interests: scalar dispersion; turbulent mixing; air pollution; ventilation; boundary layer; schlieren velocimetry; quantitative schlieren; flow control; jets
School of Engineering and Material Science, Queen Mary University of London, London E1 4NS, UK
Interests: aerodynamics; fluid–structure interactions; aeroacoustics; passive flow and noise control; jet and turbulent mixing; advanced measurement techniques

Special Issue Information

Dear Colleagues,

Understanding flow fields and their impact upon the aerodynamics of aerial vehicles often demands a good appreciation of the vortex dynamics and flow physics associated with the key flow phenomena that enable and enhance the functionalities of said aerial vehicles. Therefore, this Special Issue includes but is not limited to conventional fixed- or rotary-wing aircraft, unmanned aerial vehicles, launch vehicles, bio-inspired solutions, and projectile flights, among other applications. While parametric pursuits are often undertaken numerically or experimentally to improve and optimize their design, the role played by exploiting and optimizing the underlying fundamental flow mechanisms cannot be underestimated. In fact, the latter is more of an upstream approach that could arguably lead to more efficient and effective solutions and/or concepts by tackling the heart of the problem. However, unravelling the vortex dynamics and flow physics of many aerospace engineering applications is often challenging, especially when a myriad of different flow phenomena co-exist under unsteady, high-speed, or turbulent flow conditions. This Special Issue calls upon researchers addressing these challenges to submit their findings in order to better disseminate knowledge with the aim of informing the research community about their progress. Indeed, a more collective understanding can help the community advance significantly.

Dr. Tze How New
Dr. Desmond H. Lim
Dr. Nick Zang
Guest Editors

Manuscript Submission Information

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Keywords

  • aerodynamics
  • fluid dynamics
  • vortex dynamics
  • flow mechanism
  • flow physics
  • boundary layer
  • flow separation
  • viscous flow
  • flow transitions
  • flow instabilities

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Published Papers (1 paper)

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Research

26 pages, 17358 KiB  
Article
Direct Numerical Simulation of Flow and Heat Transfer in a Compressor Blade Passage Across a Range of Reynolds Numbers
by Yang Liu, Chenchen Zhao, Lei Zhou, Duo Wang and Hongyi Xu
Aerospace 2025, 12(6), 563; https://doi.org/10.3390/aerospace12060563 - 19 Jun 2025
Viewed by 663
Abstract
This study employs Direct Numerical Simulation (DNS) to investigate the flow and heat transfer characteristics in a compressor blade passage at five Reynolds numbers (Re=1.091×105, 1.229×105, 1.367×105, [...] Read more.
This study employs Direct Numerical Simulation (DNS) to investigate the flow and heat transfer characteristics in a compressor blade passage at five Reynolds numbers (Re=1.091×105, 1.229×105, 1.367×105, 1.506×105, and 1.645×105). A recent method based on local inviscid velocity reconstruction is applied to define and calculate boundary layer parameters, whereas the Rortex vortex identification method is used to analyze turbulent vortical structures. Results indicate that Re significantly affects separation bubble size, transition location, and reattachment behavior, thereby altering wall heat transfer characteristics. On the pressure surface, separation and early transition are observed at higher Re, with the Nusselt number (Nu) remaining high after transition. On the suction surfaces, separation occurs such that large-scale separation at low Re reduces Nu, while reattachment combined with turbulent mixing at high Re significantly increases Nu. Turbulent vortical structures enhance near-wall fluid mixing through induced ejection and sweep events, thereby promoting momentum and heat transport. As Re increases, the vortical structures become denser with reduced scales and the peaks in heat flux move closer to the wall, thus improving convective heat transfer efficiency. Full article
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