https://www.granthaalayahpublication.org/ojs-sys/ijoest <p>International Journal of Engineering Science Technologies is an open access peer reviewed journal that provides bi-monthly publication of articles in all areas of Engineering, Technologies and Science. It is an international refereed e-journal. IJOEST have the aim to propagate innovative research and eminence in knowledge. IJOEST Journals has become a prominent contributor for the research communities and societies. IJOEST Journal is making the bridge between research and developments.</p> <p>Editor-in-chief:<br />Dr. Pratosh Bansal (Professor, Department of Information Technology, Institute of Engineering &amp; Technology, Devi Ahilya Vishwavidyalaya, India)</p> <p>Managing Editor:<br />Dr. Tina Porwal (PhD, Maharani Laxmibai Girls P.G. College, Indore, India)</p> Granthaalayah Publications and Printers en-US International Journal of Engineering Science Technologies 2456-8651 https://www.granthaalayahpublication.org/ojs-sys/ijoest/article/view/646 <p>This paper presents an experimental investigation into the time-dependent aerodynamics within the base region of a representative heavy goods vehicle. The work conduced is surface-based, and involved using multiple, customized dynamic pressure sensors for both aligned and mis-aligned flow configurations. Uniquely, the methodology adopted allowed high resolution, detailed interrogation of this region and the presentation of several new insights. Among the most significant are the detailed characterization and quantification of the degree of flow-misalignment necessary to prompt development of a complex vortex/wake structure reported previously. Once developed, this structure dominated the upper-windward quadrant of the base region with measured unsteady surface loads up to 2-3 times greater than that observed under nominal flow conditions. Presented spectral information also showed evidence of both Strouhal-based vortex shedding within the wider base-pressure region as well as more localized regions containing higher spectral contributions centered broadly at several multiples of the primary shedding frequency.</p> Alvin Gatto Copyright (c) 2024 Alvin Gatto https://creativecommons.org/licenses/by/4.0 2024-11-17 2024-11-17 8 6 1–14 1–14 10.29121/ijoest.v8.i6.2024.646