School of Aeronautics Colloquium No 174

      Release Date:Nov 25, 2019      Click:次     Audit:航空学院

Title:The anti-fairing: Drag reduction at junctions

Reporter: Prof.Richard P. Dwight, TU Delft, the Netherlands

Invited by:Prof. Zhonghua Han, School of Aeronautics

Location:A817, School of Aeronautics

Time:25th, Nov, 9:30-11:00

Abstract:Interference drag from junctions represents about 5-10% of the total cruise drag of modern commercial air-transport, primarily originating from the wing-fuselage, tail-fuselage, and nacelle-pylon-wing junctions. Starting from a blank-slate, we applied adjoint shape-optimization procedures within a RANS model, to design a fairing for reducing drag in this class of flows. The result was an "anti-fairing", a shallow depression in the fuselage that appeared to reduce the interference drag by about ~10-40%. This talk will recount the history over the past 4 years of our experimental, numerical (including LES) and theoretical investigations of this highly surprising result, and our attempts to confirm it, establish its magnitude and a working mechanism, and finally apply it to real applications.

Introduction of Prof. Dwight:

Professor Richard P. Dwight received his Ph.D. from the University of Manchester in 2006, worked as an associate professor in the Department of aerodynamics at the school of Aerospace Engineering, Delft University of technology since 2009, and as a visiting professor at the Centrum voor Wiskunde en Informatica (CWI) in The Netherlands since 2017. Professor Richard P. Dwight has made great achievements in computational fluid dynamics, machine learning, aerodynamic design optimization, surrogate-based optimization method, adjoint method, uncertain optimization method and other fields.

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