Computational fluid dynamics challenges for hybrid air vehicle applications

Carrion, M., Biava, M., Steijl, R., Barakos, G.N. and Stewart, D. (2017) Computational fluid dynamics challenges for hybrid air vehicle applications. In: Knight, D., Bondar, Y., Lipatov, I. and Reijasse, P. (eds.) Progress in Flight Physics. EDP Sciences, pp. 43-80. ISBN 9785945882157 (doi:10.1051/eucass/201609043)

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Abstract

This paper begins by comparing turbulence models for the prediction of hybrid air vehicle (HAV) flows. A 6 : 1 prolate spheroid is employed for validation of the computational fluid dynamics (CFD) method. An analysis of turbulent quantities is presented and the Shear Stress Transport (SST) k-ω model is compared against a k-ω Explicit Algebraic Stress model (EASM) within the unsteady Reynolds-Averaged Navier-Stokes (RANS) framework. Further comparisons involve Scale Adaptative Simulation models and a local transition transport model. The results show that the flow around the vehicle at low pitch angles is sensitive to transition effects. At high pitch angles, the vortices generated on the suction side provide substantial lift augmentation and are better resolved by EASMs. The validated CFD method is employed for the flow around a shape similar to the Airlander aircraft of Hybrid Air Vehicles Ltd. The sensitivity of the transition location to the Reynolds number is demonstrated and the role of each vehicle£s component is analyzed. It was found that the ¦ns contributed the most to increase the lift and drag.

Item Type:Book Sections
Additional Information:Paper presented at the 6th European Conference for Aeronautics and Space Sciences (EUCASS 2015), Krakow, Poland, 29 June - 3 July 2015.
Status:Published
Glasgow Author(s) Enlighten ID:Barakos, Professor George and Biava, Dr Massimo and Carrion, Ms Marina and Steijl, Dr Rene
Authors: Carrion, M., Biava, M., Steijl, R., Barakos, G.N., and Stewart, D.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Publisher:EDP Sciences
ISBN:9785945882157
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Progress in Flight Physics - Volume 9:43-80
Publisher Policy:Reproduced under a Creative Commons License

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