Imperial College London

Dr Rob Hewson

Faculty of EngineeringDepartment of Aeronautics

Senior Lecturer in Aircraft Design
 
 
 
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Contact

 

r.hewson

 
 
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Location

 

341City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

62 results found

Amigo R, Hewson RW, Silva E, Design of Functionally Graded Adsorption Beds for Gas Storage, 11th World Congress of Structural and Multidisciplinary Optimization

CONFERENCE PAPER

Amigo RCR, Hewson RW, Silva ECN, Design of Functionally Graded Adsorption Beds for Gas Storage, 11th World Congress of Structural and Multidisciplinary Optimization

CONFERENCE PAPER

Taherkhani AR, Gilkeson CA, Gaskell PH, Hewson RW, Toropov VV, Rezaienia A, Thompson HMet al., Aerodynamic CFD based optimization of police car using Bezier curves, SAE International Journal of Materials and Manufacturing, ISSN: 1946-3987

This paper investigates the optimization of the aerodynamic design of a police car, BMW 5-series which is popular police force across the UK. A Bezier curve fitting approach is proposed as a tool to improve the existing design of the warning light cluster in order to reduce drag. A formal optimization technique based on Computational Fluid Dynamics (CFD) and moving least squares (MLS) is used to determine the control points for the approximated curve to cover the light-bar and streamline the shape of the roof. The results clearly show that improving the aerodynamic design of the roofs will offer an important opportunity for reducing the fuel consumption and emissions for police vehicles. The optimized police car has 30% less drag than the non-optimized counter-part.

JOURNAL ARTICLE

Bach C, Jebari R, Viti A, Hewson Ret al., 2017, Composite stacking sequence optimization for aeroelastically tailored forward-swept wings, Structural and Multidisciplinary Optimization, Vol: 55, Pages: 105-119, ISSN: 1615-147X

JOURNAL ARTICLE

Gao L, Dowson D, Hewson RW, 2017, Predictive wear modeling of the articulating metal-on-metal hip replacements, JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, Vol: 105, Pages: 497-506, ISSN: 1552-4973

JOURNAL ARTICLE

Raske N, Hewson RW, Kapur N, de Boer GNet al., 2017, A predictive model for discrete cell gravure roll coating, PHYSICS OF FLUIDS, Vol: 29, ISSN: 1070-6631

JOURNAL ARTICLE

de Boer G, Hewson R, Bryant M, Dowson Det al., 2017, An investigation into the contact between soft elastic and poroelastic bodies rotating under load, Tribology - Materials, Surfaces & Interfaces, Pages: 1-9, ISSN: 1751-5831

JOURNAL ARTICLE

de Boer GN, Gao L, Hewson RW, Thompson HMet al., 2017, Heterogeneous Multiscale Methods for modelling surface topography in Elastohydrodynamic Lubrication line contacts, TRIBOLOGY INTERNATIONAL, Vol: 113, Pages: 262-278, ISSN: 0301-679X

JOURNAL ARTICLE

Gao L, Dowson D, Hewson RW, 2016, A numerical study of non-Newtonian transient elastohydrodynamic lubrication of metal-on-metal hip prostheses, TRIBOLOGY INTERNATIONAL, Vol: 93, Pages: 486-494, ISSN: 0301-679X

JOURNAL ARTICLE

Gao L, Hewson RW, 2016, Development of A Wear Model for LubricatedMetal-On-Metal Hip Joints, 5th International Conference on Biomedical Engineering and Biotechnology 2016

CONFERENCE PAPER

Wang H, de Boer G, Kow J, Alazmani A, Ghajari M, Hewson R, Culmer Pet al., 2016, Design Methodology for Magnetic Field-Based Soft Tri-Axis Tactile Sensors, SENSORS, Vol: 16, ISSN: 1424-8220

JOURNAL ARTICLE

Wang H, de Boer G, Kow J, Ghajari M, Alazmani A, Hewson R, Culmer Pet al., 2016, A Low-cost Soft Tactile Sensing Array using 3D Hall Sensors, PROCEEDINGS OF THE 30TH ANNIVERSARY EUROSENSORS CONFERENCE - EUROSENSORS 2016, Vol: 168, Pages: 650-653, ISSN: 1877-7058

JOURNAL ARTICLE

de Boer G, Wang H, Ghajari M, Alazmani A, Hewson R, Culmer Pet al., 2016, Force and Topography Reconstruction Using GP and MOR for the TACTIP Soft Sensor System, 17th Annual Conference on Towards Autonomous Robotic Systems (TAROS), Publisher: SPRINGER INT PUBLISHING AG, Pages: 65-74, ISSN: 0302-9743

CONFERENCE PAPER

de Boer GN, Gao L, Hewson RW, Thompson HM, Raske N, Toropov VVet al., 2016, A multiscale method for optimising surface topography in elastohydrodynamic lubrication (EHL) using metamodels, STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION, Vol: 54, Pages: 483-497, ISSN: 1615-147X

JOURNAL ARTICLE

Gao L, de Boer G, Hewson R, 2015, The role of micro-cavitation on EHL: A study using a multiscale mass conserving approach, TRIBOLOGY INTERNATIONAL, Vol: 90, Pages: 324-331, ISSN: 0301-679X

JOURNAL ARTICLE

Raske N, Hewson RW, Kapur N, Gaskell PHet al., 2015, A predictive model for discrete cell gravure roll coating, 11th European Coating Symposium 2015

CONFERENCE PAPER

Taherkhani AR, de Boer GN, Gaskell PH, Gilkeson CA, Hewson RW, Keech A, Thompson HM, Toropov VVet al., 2015, Aerodynamic drag reduction of emergency response vehicles, Advances in Automobile Engineering, Vol: 4, ISSN: 2167-7670

This paper presents the first experimental and computational investigation into the aerodynamics of emergency response vehicles and focuses on reducing the additional drag that results from the customary practice of adding light-bars onto the vehicles’ roofs. A series of wind tunnel experiments demonstrate the significant increase in drag that results from the light bars and show these can be minimized by reducing the flow separation caused by them. Simple potential improvements in the aerodynamic design of the light bars are investigated by combining Computational Fluid Dynamics (CFD) with Design of Experiments and metamodelling methods. An aerofoil-based roof design concept is shown to reduce the overall aerodynamic drag by up to 20% and an analysis of its effect on overall fuel consumption indicates that it offers a significant opportunity for improving the fuel economy and reducing emissions from emergency response vehicles. These benefits are now being realised by the UK’s ambulance services.

JOURNAL ARTICLE

Amigo RCR, Hewson RW, Silva ECN, 2014, On the optimization of adsorption systems, 11th World Congress on Computational Mechanics (WCCM XI)

CONFERENCE PAPER

Berci M, Toropov VV, Hewson RW, Gaskell PHet al., 2014, Multidisciplinary multifidelity optimisation of a flexible wing aerofoil with reference to a small UAV, STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION, Vol: 50, Pages: 683-699, ISSN: 1615-147X

JOURNAL ARTICLE

Gao L, Dowson D, Hewson RW, 2014, A numerical study of non-newtonian transient elastohydrodynamic lubrication of metal-on-metal hip prostheses: the effect of lubricant shear-thinning properties, Leeds Lyon Symposium on Tribology

CONFERENCE PAPER

Gao L, Hewson RW, 2014, A mechanical wear model of metal-on-metal total hip replacements in mixed lubrication conditions., 7th China International Symposium on Tribology (CIST)

CONFERENCE PAPER

Johns A, Hewson RW, Merson E, Summers JL, Thompson HMet al., 2014, Internal twist drill coolant channel modelling using computational fluid dynamics, 11th World Congress on Computational Mechanics (WCCM XI)

CONFERENCE PAPER

de Boer GN, Hewson RW, Thompson HM, Gao L, Toropov VVet al., 2014, Two-scale EHL: Three-dimensional topography in tilted-pad bearings, TRIBOLOGY INTERNATIONAL, Vol: 79, Pages: 111-125, ISSN: 0301-679X

JOURNAL ARTICLE

Berci M, Gaskell PH, Hewson RW, Toropov VVet al., 2013, A semi-analytical model for the combined aeroelastic behaviour and gust response of a flexible aerofoil, JOURNAL OF FLUIDS AND STRUCTURES, Vol: 38, Pages: 3-21, ISSN: 0889-9746

JOURNAL ARTICLE

Charpentier TVJ, Neville A, Millner P, Hewson R, Morina Aet al., 2013, An Investigation of Freezing of Supercooled Water on Anti-Freeze Protein Modified Surfaces, JOURNAL OF BIONIC ENGINEERING, Vol: 10, Pages: 139-147, ISSN: 1672-6529

JOURNAL ARTICLE

Charpentier TVJ, Neville A, Millner P, Hewson RW, Morina Aet al., 2013, Development of anti-icing materials by chemical tailoring of hydrophobic textured metallic surfaces, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 394, Pages: 539-544, ISSN: 0021-9797

JOURNAL ARTICLE

Gao L, de Boer GN, Hewson RW, 2013, A multiscale framework for lubrication analysis of bearings with textured surface, Advances in Interactions and Multiscale Mechanics, part of the 2013 World Congress in Structural Engineering and Mechanics

CONFERENCE PAPER

Hewson RW, Kapur N, 2013, Effects of shear thinning on forward roll coating, Chemical Engineering Research and Design, Vol: 91, Pages: 2427-2436, ISSN: 0263-8762

JOURNAL ARTICLE

Hu R, Hewson R, Morina A, Liu Zet al., 2013, Influence of material properties and operating conditions on the predicted performance of poroelastic faced bearings, Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, Vol: 228, Pages: 131-139, ISSN: 1350-6501

JOURNAL ARTICLE

Muir M, Muldal C, Kolb E, Robertson G, Parkinson A, Querin OM, Hewson RW, Toropov VVet al., 2013, The use of MDO and advanced manufacturing to demonstrate rapid, agile construction of a mission optimized UAV

Broad spectrum mission capability for minimal cost is a critical objective for many systems undergoing design and development for use in modern theaters. Through utilization of combinatory and mutually beneficial technologies, a technique has been developed and demonstrated which allows for optimized mission performance characteristics to be achievable and deployable at minimal cost and vastly reduced lead time. Using typical surveillance mission parameters and allowing for variation in deployment zones and atmospheric conditions, multi-method modeling was used to simulate aerodynamic performance characteristics of a NACA6414 based aerofoil. Optimized structural layout was then determined accounting for both structural load cases and the delicate complexities of selected laser sintering and electron beam melting approaches to additive manufacturing. Using the derived structural layout, an iterative aerodynamic optimization using mesh deformation and maximization of elliptical lift distribution was performed, culminating in a design validation analysis and comparison. Export, correction and parameterization of the final design was compiled and delivered to a pre-selected additive manufacturing process ready for automated build. The developed process represents an automated MDO design and manufacturing methodology capable of delivering a uniquely optimized mission capability at a fraction of the time and cost ordinarily required to redevelop already supplied hardware for a bespoke purpose. Furthermore, the process demonstrates how through the combined use of additive manufacturing and structural topology optimization benefits greater than the sum of their parts can be achievable through suitable design parameterization. © 2013 by Vassili Toropov, Martin Muir, Osvaldo Querin, Robert Hewson.

CONFERENCE PAPER

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