Imperial College London

Professor Richard Hillier

Faculty of EngineeringDepartment of Aeronautics

Emeritus Professor
 
 
 
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Contact

 

+44 (0)20 7594 5064r.hillier

 
 
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Location

 

358Roderic Hill BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

55 results found

Estruch-Samper D, Hillier R, Vanstone L, Ganapathisubramani Bet al., 2017, Effect of isolated roughness element height on high-speed laminar-turbulent transition, JOURNAL OF FLUID MECHANICS, Vol: 818, ISSN: 0022-1120

Understanding of the roughness-induced laminar–turbulent transition of supersonic and hypersonic flows is partly challenged by the intricate sensitivities presented by different correlation criteria. We investigate experimentally the effect of height for an isolated roughness element of quadrilateral planform. Heat transfer measurements document the enhancement of roughness-induced disturbances – here the associated heat flux perturbation – along a downstream axisymmetric laminar separation. With increasing element height , a gradual intensification in wake disturbance levels is found for subcritical elements ( , where is the undisturbed boundary layer thickness) while elements taller than the effective condition ( ) bypass the more moderate transition mechanisms to produce a fully turbulent element wake. Results exhibit high sensitivity to flow properties at roughness height between critical and effective conditions. A reduction in wake disturbance levels with increasing height is documented within . This effect coincides with a decrease in kinematic viscosity at roughness height (as Mach number at height increases from 1.52 to 1.96) and is restricted to elements with strong local separation, whereby the influence of local shear effects is enhanced.

Journal article

Estruch-Samper D, Vanstone L, Hillier R, Ganapathisubramani Bet al., 2015, Micro vortex generator control of axisymmetric high-speed laminar boundary layer separation, SHOCK WAVES, Vol: 25, Pages: 521-533, ISSN: 0938-1287

Journal article

Hillier R, Estruch-Samper D, Murray N, Vanstone L, Williams Set al., 2015, Gun tunnel studies of shock-wave/boundary-layer interactions: Laminar, Transitional and Turbulent, 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference

Conference paper

Estruch-Samper D, Vanstone L, Hillier R, Ganapathisubramani Bet al., 2015, Toluene-based planar laser-induced fluorescence imaging of temperature in hypersonic flows, EXPERIMENTS IN FLUIDS, Vol: 56, ISSN: 0723-4864

Journal article

Hillier R, Estruch-Samper D, Vanstone L, Ganapathisubramani Bet al., 2014, PLIF temperature imaging of a Mach 9 blunt body, 19th Australasian Fluid Mechanics Conference

Conference paper

Fiala A, Hillier R, Estruch-Samper D, 2014, Roughness-induced turbulent wedges in a hypersonic blunt-body boundary layer, JOURNAL OF FLUID MECHANICS, Vol: 754, Pages: 208-231, ISSN: 0022-1120

Journal article

Hillier R, Vanstone L, Estruch-Samper D, Ganapathisubramani Bet al., 2013, Shock Induced Separation in Transitional Hypersonic Boundary Layers, AIAA 43rd Fluid Dynamics Conference, Fluid Dynamics and Co-located Conferences

Conference paper

Hillier R, Estruch-Samper D, Ganapathisubramani B, Vanstone Let al., 2013, Effect of roughness-induced disturbances on an axisymmetric hypersonic laminar boundary layer, 51st Aerospace Sciences AIAA Meeting Including The New Horizons Forum and Aerospace Exposition

Conference paper

Murray N, Hillier R, Williams S, 2013, Experimental investigation of axisymmetric hypersonic shock-wave/turbulent-boundary-layer interactions, Journal of Fluid Mechanics, Vol: 714, Pages: 152-189

Journal article

Yildirim E, Hillier R, 2012, Numerical modelling of the impulsive orthogonal cutting of a trailing vortex, Shock Waves

Journal article

Hillier A, Hillier R, Tripathi D, 2012, Determination of prominence plasma Beta from the dynamics of rising plumes, ASTROPHYSICAL JOURNAL, Vol: 761

Journal article

Estruch-Samper D, Vanstone L, Ganapathisubramani B, Hillier Ret al., 2012, Axisymmetric flare-induced separation of high-speed transitional boundary layers, 50th Aerospace Sciences AIAA Meeting Including The New Horizons Forum and Aerospace Exposition, Nashville, TN, USA, Jan. 9-12

Conference paper

Mohri K, Hillier R, 2011, Computational and experimental study of supersonic flow over axisymmetric cavities, SHOCK WAVES, Vol: 21, Pages: 175-191, ISSN: 0938-1287

Journal article

Murray N, Hillier R, 2009, Axisymmetric separated shock-wave boundary-layer interaction, 26th International Symposium on Shock Waves, Publisher: SPRINGER-VERLAG BERLIN, Pages: 1225-1230

Conference paper

Mohri K, Hillier R, 2009, Supersonic flow over axisymmetric cavities, 26th International Symposium on Shock Waves, Publisher: SPRINGER-VERLAG BERLIN, Pages: 707-712

Conference paper

Hillier R, Murray N, 2008, The effect of pressure gradients on surface heat-transfer in hypersonic turbulent flows, 6th European Symposium on Aerothermodynamics for Space vehicles

Conference paper

Creighton S, Hillier R, 2007, Experimental and computational study of unsteady hypersonic cavity flows, AERONAUTICAL JOURNAL, Vol: 111, Pages: 673-688, ISSN: 0001-9240

Journal article

Hillier R, 2007, Shock-wave/expansion-wave interactions and the transition between regular and Mach reflection, J FLUID MECH, Vol: 575, Pages: 399-424, ISSN: 0022-1120

Journal article

Hillier R, Murray N, 2006, Hypersonic shock wave/turbulent boundary layer interactions in a three-dimensional flow, 44th AIAA Aerospace Sciences Meeting and Exhibit

Conference paper

Hillier R, Murray N, 2006, ‘Separated shock wave/turbulent boundary layer interactions at hypersonic speeds, 36th AIAA (American Institute of Aeronautics and Astronautics) Fluid Dynamics Conference

Conference paper

Fiala A, Hillier R, Mallinson SG, Wijesinghe HSet al., 2006, Heat transfer measurement of turbulent spots in a hypersonic blunt-body boundary layer, JOURNAL OF FLUID MECHANICS, Vol: 555, Pages: 81-111, ISSN: 0022-1120

Journal article

Blackmar SC, Hillier R, 2006, Unsteady properties of a separated and reattaching flow., 36th AIAA Fluid Dynamics Conference

Conference paper

Bachchan N, Hillier R, 2005, Shock-wave/expansion-wave interactions and the transition from regular to Mach reflection, Bangalore, India, Shock Waves.Proceedings of the 25th International Symposium on Shock Waves-ISSW25, 17 - 22 July 2005, Bangalore, India, Publisher: Society for shock wave research, Dept. of Aerospace Engg., IISC, Bangalore-560 012, India, Pages: 265-270

Conference paper

Williams S, Hillier R, 2005, Experimental investigation of a three-dimensional hypersonic turbulent separated flow, Bangalore, India, ISSW25. The 25th International Symposium on Shock Waves, Publisher: Society for shock wave research, Dept. of Aerospace Engg. IISc Bangalore-560 012, India, Pages: 279-284

Conference paper

Tsimis C, Hillier R, 2005, Computational and experimental work on supersonic jet injection and mixing layers, Bangalore, India, Shock Waves.Proceedings of the 25th International Symposium on Shock Waves-ISSW25, 17 - 22 July 2005, Bangalore, India, Publisher: Society for Shock Wave Research, Dept. of Aerospace Engg., IISc, Bangalore-560 012, Pages: 1131-1136

Conference paper

Fiala A, Hillier R, 2004, Aerothermodynamics of turbulent spots and wedges at hypersonic speeds, 5th European Symposium on Aerothermodynamics for Space Vehicles, 8 - 11 November 2004, Cologne, GERMANY, Publisher: Esa Publications Division, Pages: 615-620

Conference paper

Bachchan N, Hillier R, 2004, Shock expansion interactions in hypersonic inlet flows, Royal Aeronautical Society Aerospace Conference, 2004

Conference paper

Fiala A, Hillier R, 2004, Experimental investigation of turbulent spots and wedges in a hypersonic blunt body transitional flow, London, RAeS Aerospace Aerodynamics Research conference, 14 - 15 September 2004, London, UK, Publisher: Royal Aeronautical Society, Pages: 1-13

Conference paper

Murray N, Hillier R, 2004, Aerothermodynamics of turbulent shock/boundary layer interaction in three-dimensional hypersonic flows, 5th European symposium on aerothermodynamics for space vehicles, DLR, Cologne, Germany, 8 - 11 November 2004, Publisher: ESA, Pages: 621-626

Conference paper

Bachchan N, Hillier R, 2004, Hypersonic inlet flow analysis at off design conditions, Reston, VA 20191, United States, AAIA 22nd applied aerodynamics conference and exhibition, 2004, Publisher: American Institute of Aeronautics and Astronautics Inc., Pages: 1180-1192, ISSN: 1048-5953

Conference paper

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