Guorong, M A and Khan, Sher Afghan and Khan, Ambareen and Akhtar, Mohammad Nishat (2026) Passive control of base pressure: a review of mechanisms, efficacy, and design integration. Aeronautics and Aerospace Open access Journal, 10 (2). pp. 89-92. E-ISSN 2576-4500
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Abstract
Passive control of base pressure remains a critical technology for drag reduction in aerospace and automotive applications, offering simplicity and reliability without external energy input. Volume 10 Issue 2 - 2026 While numerous techniques—including cavities, ribs, spikes, and boat-tailing— have been extensively studied, a synthesis that focuses on the unifying flow physics and the practical challenges of design integration is warranted. This review analyzes passive control methods through the lens of their interactions with key flow features: shear-layer dynamics, recirculation-zone structure, and vortex-shedding mechanisms. We categorize techniques based on their primary control mechanism: (1) Shear Layer Manipulation, (2) Recirculation Zone Modification, and (3) Wake Stabilization. Recent advances from 2020 to 2024 are incorporated to update the field’s state of the art. The paper critically evaluates the efficacy of each method across different flow regimes (subsonic to supersonic) and applications (internal vs. external flows), highlighting performance trade-offs, optimal parameter ranges, and synergistic effects. We conclude by identifying persistent knowledge gaps and proposing future research directions focused on hybrid passive systems, additive manufacturing for complex geometries, and applications in next-generation high-speed vehicles.
| Item Type: | Article (Journal) |
|---|---|
| Uncontrolled Keywords: | base drag, passive flow control, recirculation zone, shear layer, vortex dynamics, drag reduction, aerodynamic optimization. |
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL780 Rockets |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Engineering > Department of Mechanical Engineering Kulliyyah of Engineering |
| Depositing User: | Prof. Dr. Sher Afghan Khan |
| Date Deposited: | 11 Jun 2026 12:10 |
| Last Modified: | 11 Jun 2026 12:10 |
| Queue Number: | 2026-05-Q3605 |
| URI: | http://irep.iium.edu.my/id/eprint/129195 |
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