Laminar Flow Control and Drag Reduction using Biomimetically Inspired Forward Facing Steps
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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JR_JACM-7-2_032
تاریخ نمایه سازی: 9 خرداد 1400
Abstract:
This paper explores the use of shark-skin inspired two-dimensional forward facing steps to attain laminar flow control, delay boundary layer transition and to reduce drag. Computation Fluid Dynamics (CFD) simulations are carried out on strategically placed forward facing steps within the laminar boundary layer using the Transition SST model in FLUENT after comprehensive benchmarking and validation of the simulation setup. Results presented in this paper indicate that the boundary layer thickness to step height ratio (d/h), as well as the location of the step within the laminar boundary layer (x/L), greatly influence transition onset. The presence of a strategically placed forward facing step within the laminar boundary layer might damp disturbances within the laminar boundary layer, reduce wall shear stress and energize the boundary layer leading to transition onset delay and drag reduction as compared to a conventional flat plate. Results presented in this paper indicate that a transition delay of ۲۰% and a drag reduction of ۶% is achievable, thereby demonstrating the veracity of biomimicry as a potential avenue to attain improved aerodynamic performance.
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Authors
Dinesh Bhatia
School of Aerospace Engineering, The University of Nottingham Ningbo China, ۱۹۹ Taikang East Road, Ningbo ۳۱۵۱۰۰, China
Guangning Li
School of Astronautics, Northwestern Polytechnical University,۱۲۷ Youyi West Road, Xi’an ۷۱۰۰۷۲, China
Jing Sun
School of Aeronautics, Northwestern Polytechnical University,۱۲۷ Youyi West Road, Xi’an ۷۱۰۰۷۲, China
Jian Wang
Faculty of Science, Engineering and Computing, Kingston University London, Friars Avenue, London SW۱۵ ۳DW, United Kingdom
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