| Forthcoming Papers > International Journal of Aerodynamics (IJAD) Journal Homepage This page lists papers submitted for IJAD via the web that have been reviewed and accepted but not yet published. Please note that titles, authors, abstracts and keywords may change upon publication. Our TOC e-mail alerting service will notify you immediately when new issues of IJAD are published on-line. Click here to register for our TOC E-Mail Alerting. We also offer the convenience of RSS feeds which provide a means to view new content timely posted to your web site or desktop. Click here to start to use our free RSS news feeds. | International Journal of Aerodynamics (2 papers in press)
- Modeling of Efficiency of Aerodynamic Devices on a Tractor-Trailer
by Len Malinin, Alexey Borovkov, Igor Voynov, Bronislav Pyak, Vyacheslav Pyak
Abstract: While trucking accounts for 60% of freight energy use in the US, aerodynamic drag is responsible for 65% of the total energy expenditure for a heavy truck at 70 miles per hour. Reducing the aerodynamic resistance of a heavy truck can significantly improve its fuel economy. While multiple aerodynamic devices have been proposed for heavy trucks, they do not always promote the most efficient operation, as they may hinder maneuvering and docking. This limited acceptance by the industry can be summarized as a contradiction: Aerodynamic devices are useful at cruising speed, but during docking or maneuvering they may be an obstacle to efficient operations. This contradiction can be resolved if the devices are only deployed or interact with the incoming flow at high speed. Examples are dynamic (foldable) side fairings and vortex generators (VGs). Computational Fluid Dynamics (CFD) modeling of the VGs under head and side wind conditions has shown that they are more efficient for side winds than for head winds.
Keywords: heavy truck; aerodynamic resistance; foldable fairings; CFD modeling; vortex generators.
- EFFECT OF ANGLE OF ATTACK ON THE YF-16 INLET
by I.H. Ibrahim, E.Y.K. Ng, L.W.K. Wong
Abstract: A k-Epsilon; numerical numerical analysis of a fuselage-shielded inlet similar to that of the YF-16 was conducted. The simulations were conducted at Mach 0.6 at -10° to 40° angles of attack. Results were validated with experimental values obtained in the 90° bending pipe and circular s-duct. Pre-entry separation effects were simulated by a flat plate and offset by the diverter height. Results showed that the pressure recoveries resembled that of the YF-16 inlet, where negligible losses were up to 30° AOA (Angle of Attack). The increase in angle of attack also resulted in the diminishing strength of the twin swirls.
Keywords: Angle of attack, curved, diffuser, pressure recovery, distortion, YF-16
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