Philip Hancock

Emeritus Reader in Fluid Mechanics

Academic and research departments

School of Mechanical Engineering Sciences.

News

02 DEC 2020

Powering the future of offshore wind farms

21 NOV 2019

Surrey to develop tool to help predict the efficiency of wind farms

Research

Research interests

Aerodynamics, turbulence and boundary layer meteorology
Wind-tunnel simulation of neutral, stable and convective atmospheric boundary layer flows
Wind turbine wakes, wake-wake and wake turbine interactions
Structure of complex turbulent flows, boundary layers, separated flows and wakes
Aerodynamic and bluff body flows, wind power aerodynamics.

Publications

Philip E Hancock, Paul Hayden (2020)Wind-Tunnel Simulation of Stable Atmospheric Boundary Layers with an Overlying Inversion, In: Boundary-layer Meteorology175(1)pp. 93-112 Springer

DOI: 10.1007/s10546-019-00496-7

Four cases of an overlying inversion imposed on a stable boundary layer are investigated, extending the earlier work of Hancock and Hayden (Boundary-Layer Meteorol 168:29–57, 2018), where no inversion was imposed. The inversion is imposed to one or other of two depths within the layer: midway or deep. Four cases of changed surface condition are also investigated, and it is seen that the surface and imposed conditions behave independently. A change of imposed inversion condition leaves the bottom 1/3 of the layer almost completely unaffected; a change of the surface condition leaves the top 2/3 unaffected. Comparisons are made against two sets of local-scaling systems over the full height of the boundary layer. Both show some influence of the inversion condition. The surface heat flux and the reduction in surface shear stress, and hence the ratio of the boundary-layer height to surface Obukhov length, are determined by the temperature difference across the surface layer (not the whole layer), bringing all cases together in single correlations as functions of a surface-layer bulk Richardson number.

Marco Placidi, Philip E Hancock, Thomas D Farr (2019)1.8_Placidi: Blockage effects as inferred from measurements in the EnFlo stratified-flow wind tunnel Zenodo

DOI: 10.5281/zenodo.3360292

This work was presented at WESC 2019 in Cork.

Additional publications

Hancock, P. E. and Hayden, P. 2021. Wind-tunnel simulation of approximately horizontally homogeneous stable atmospheric boundary layers. Boundary-Layer Meteorology. 180:5-26.

Hancock, P. E. and Hayden, P. 2020. Wind-tunnel simulation of stable atmospheric boundary layers with an overlying inversion. Boundary-Layer Meteorology. 175:93-112.

P. E. Hancock, M. Placidia and T. D. Farr 2019. Blockage effects as inferred from measurements in the EnFlo stratified-‐flow wind tunnel. WESC 2019, 17th-20th June, Cork (presentation, no paper).

Hancock, Philip 2019 Maximizing wind resource via Advanced modelling – an overview. An overview of the EPSRC Supergen-Wind Grand Challenge Project MAXFARM. Wind Europe Event, Supergen Wind Hub, 3rd April 2019, Bilbao. https://www.supergen-wind.org.uk/research/windeurope (presentation, no paper).

Hancock, P. E. and Hayden, P. 2018. Wind-Tunnel Simulation of Weakly and Moderately Stable Atmospheric Boundary Layers. Boundary-Layer Meteorology. 168(1), 29-57. doi.org/10.1007/s10546-018-0337-7.

Hancock, P. E., Hayden, P. 2018. Wind turbine wakes in stable atmospheric boundary layers. OffshoreWind 2018, Bremerhaven. http://www.rave-offshore.de/en/conference.html (presentation, no paper).

Hancock, P. E. and Hayden, P. 2018. Wind-tunnel simulation of stable atmospheric boundary layers with an overlying inversion. 13th Conference on Wind Engineering, Univ of Leeds, 3-4th Sept 2018. Prize to lead author: Wind Engineering Society of the Inst of Civil Engineers, Best Overall Presentation.

Desmond, C., Watson, S. J., Hancock, P. E. 2017. Modelling the wind energy resource in complex terrain and atmospheres. Numerical simulation and wind tunnel investigation of non-neutral forest canopy flows. J. Wind Eng. and Industrial Aerodynamics. 166, 48-60.

Watson S., and Hancock P. E. 2017. Chapter 1. Wind resource. UK Wind Energy Technologies. Ed S Hogg and C J Crabtree. Routledge. ISBN: 978-1-138-78046-0 / 978-1-315-681382-2.

Hancock, P. E and Hayden, P. 2017. Wind-tunnel simulation of stably stratified deep atmospheric boundary layers with an imposed inversion. Physmod 2017 – International Workshop on Physical Modelling of Flow and Dispersion Phenomena Dynamics of Urban and Coastal Atmosphere – LHEEA - École Centrale de Nantes - France 23 - 25 August 2017.

Marucci, D., Hancock, P. E., Carpentieri, M. and Hayden, p. 2016. Wind-tunnel simulation of stable atmospheric boundary layers for fundamental studies in dispersion and wind power. 12th UK Conference in Wind Engineering, Nottingham.

Hancock, P. E and Hayden, P. 2016. Wind tunnel simulation of stably stratified atmospheric boundary layers. The Science of Making Torque from Wind, EAWE Conf ., TUM, Oct 5-7, 2016. J of Physics Conf Series. doi:10.1088/1742-6596/753/3/032012.

Hancock, P. E. and Zhang, S. 2015. A wind-tunnel simulation of the wake of a large wind turbine in a weakly unstable boundary layer. Boundary-Layer Meteorology DOI 10.1007/s10546-015-0037-5. Hard copy: 156(3), 395-413.

Hancock, P. E. and Pascheke, F. 2014. Wind-tunnel simulation of the wake of a large wind turbine in a stable boundary layer: Part 1, the boundary layer simulation. Boundary-Layer Meteorology DOI 10.1007/s10546-013-9886-y. Hard copy: 151(1), 3-21.

Hancock, P. E. and Pascheke, F. 2014. Wind-tunnel simulation of the wake of a large wind turbine in a stable boundary layer: Part 2 the wake flow. Boundary-Layer Meteorology DOI 10.1007/s10546-013-9887-x. Hard copy: 151(1), 23-37.

Desmond, C., Watson, S. J., Aubrun, S., Avila, S., Hancock, P. E., Sayer, A. 2014. A study on the inclusion of forest canopy morphology data in numerical simulations for the purpose of wind resource assessment. J. Wind Engineering and Industrial Aerodynamics. 126, 24-37. doi.org/10.1016/j.jweia.2013.12.011

Hancock, P. E. and Farr, T. D. 2014. Wind tunnel simulations of wind turbine arrays in neutral and non-neutral winds. The Science of Making Torque from Wind, EAWE Conf., Risø/DTU, Copenhagen, June 18-20, 2014. Journal of Physics: Conference Series. Vol. 524. Ed: Jakob Mann et al 2014 J. Phys.: Conf. Ser. 524 011001 doi:10.1088/1742-6596/524/1/012166.

Farr, T. D. and Hancock, P. E. 2014. Torque fluctuations caused by upstream mean flow and turbulence. The Science of Making Torque from Wind, EAWE Conf., Oldenburg, Oct 9-11, 2012. Journal of Physics: Conference Series 555 (2014) 012048. doi:10.1088/1742-6596/555/1/012048.

Hancock, P. E., Zhang, S., Pascheke, F. and Hayden, P. 2014. Wind tunnel simulation of wind turbine wakes in stable and unstable wind flow. The Science of Making Torque from Wind, EAWE Conf., Oldenburg, Oct 9-11, 2012. Journal of Physics: Conference Series 555 (2014) 012047. doi:10.1088/1742-6596/555/1/012047

Hancock, P E, Zhang S and Hayden, P. 2013. A wind-tunnel artificially-thickened weakly-unstable atmospheric boundary layer. Boundary Layer Meteorology, 149(3):355–380 DOI 10.1007/s10546-013-9847-5.

Aubrun, S., Loyer, S., Hancock, P. E. and Hayden, P. 2013. Wind turbine wake properties: comparison between a non-rotating simplified wind tunnel model and a rotating model. J. Wind Engineering and Industrial Aerodynamics, 120, 1-8. doi.org/10.1016/j.jweia.2013.06.007.

Hancock, P. E. 2013. Wind turbines in series: a parametric analysis. J Wind Engineering Vol 37(1), 2013 pp37-58. DOI: 10.1260/0309-524X.37.1.37.

Hancock, P. E. Zhang, S. and Hayden, P. 2013. Wind-tunnel simulation of a wind-turbine wake in unstable wind flow. PHYSMOD 2013 – International Workshop on Physical Modeling of Flow and Dispersion Phenomena, University of Surrey, UK, 16th – 18th September 2013.

Hancock, P E. 2012. Wind Tunnel Simulation of Wind Turbine Wakes in Neutral, Stable and Unstable Offshore Atmospheric Boundary Layers. Euromech 528, Oldenburg, February 2012. Research Topics in Wind Energy, Vol. 2. Wind Energy –Impact of Turbulence. Ed: Hölling, M., Peinke, J. and Ivanell, S. Springer, DOI: 10.1007/978-3-642-54696-9_16.

Hancock, P. E., Pascheke, F. and Zhang, S. 2012 Wind tunnel simulation of wind turbine wakes in neutral, stable and unstable offshore. atmospheric boundary layers. Euromech 528, Oldenburg, February 2012.

Aubrun, S.1, Espana, G.1, Loyer, A.1, Hayden, P.2 and Hancock, P. E.2 2012. Is the actuator disc concept sufficient to model the far wake of a wind turbine? iTi 2010 Conference on Turbulence, one-day workshop, 23 Sept 2010, Bertinoro, Italy. 1Univ. of Orleans, 2Univ of Surrey. ISBN: 978-3-642-28967-5 (Print) 978-3-642-28968-2 (Online).

Nathan, P. and Hancock, P. E. 2011. Two-point near-wall measurements of velocity and wall shear stress beneath a separating turbulent boundary layer. Proc. Progress in wall turbulence: understanding and modelling. Lille (France), April 21-23, 2009. Ed Stanislas, M, Jimenez, J, and Marusic, I. Springer. ISBN 978-90-481-9602-9. http://www.springer.com/engineering/book/978-90-481-9602-9.

Aubrun, S., Espana, G., Loyer, A., Hayden, P. and Hancock, P. E., 2011. Experimental study of the wind turbine wake meandering with the help of a non-rotative simplified model and of a rotative model. AIAA/ASME Wind Energy Symposium, Orlando.

Hancock, P. E. and Pascheke, F. 2010. Wind tunnel simulations of wind turbine wake interactions in neutral and stratified wind flow. Euro Meteorological Soc. Annual Meeting Abstracts, Vol. 7, EMS2010-PREVIEW. 10thEMS/8thECAC, Zurich, 13th- 16th Sept.

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