Publications 2017


Demonstration and uncertainty analysis of synchronised scanning lidar measurements of 2-D velocity fields in a boundary-layer wind tunnel

Marijn Floris van Dooren, Filippo Campagnolo, Mikael Sjöholm, Nikolas Angelou, Torben Mikkelsen, and Martin Kühn
Published by Copernicus Publications on behalf of the European Academy of Wind Energy e.V., 2017 (DOI: https://doi.org/10.5194/wes-2-329-2017)

Type: Research article

Status: Published   |    År: 2017     |    DOI: https://doi.org/10.5194/wes-2-329-2017

Publications 2016

Application of short‑range dual‑Doppler lidars to evaluate the coherence of turbulence

Cheynet, Etienne ; Jakobsen, Jasna Bogunovic´ ; Snæbjörnsson, Jónas ; Mikkelsen, Torben ; Sjöholm, Mikael ; Mann, Jakob ; Hansen, Per ; Angelou, Nikolas ; Svardal, Benny
in journal: Experiments in Fluids — 2016, (ISSN: 14321114, 07234864) (DOI: 10.1007/s00348-016-2275-9), Volume 57, Issue 12, pp. 1-17

Type: Journal article

Status: Published   |    År: 2016     |    DOI: 10.1007/s00348-016-2275-9

Investigation of wake interaction using full-scale lidar measurements and large eddy simulation

Machefaux, Ewan ; Larsen, Gunner Chr. ; Troldborg, Niels ; Hansen, Kurt Schaldemose ; Angelou, Nikolas ; Mikkelsen, Torben Krogh ; Mann, Jakob
in journal: Wind Energy (ISSN: 1095-4244) (DOI: http://dx.doi.org/10.1002/we.1936), vol: 19, issue: 8, pages: 1535-1551, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1002/we.1936

Variations of the Wake Height over the Bolund Escarpment Measured by a Scanning Lidar

Lange, Julia ; Mann, Jakob ; Angelou, Nikolas ; Berg, Jacob ; Sjöholm, Mikael ; Mikkelsen, Torben Krogh
in journal: Boundary-Layer Meteorology (ISSN: 0006-8314) (DOI: http://dx.doi.org/10.1007/s10546-015-0107-8), vol: 159, pages: 147–159, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1007/s10546-015-0107-8


Characterization of wind velocities in the upstream induction zone of a wind turbine using scanning continuous-wave lidars

Simley, Eric ; Angelou, Nikolas ; Mikkelsen, Torben Krogh ; Sjöholm, Mikael ; Mann, Jakob ; Pao, Lucy Y.
in journal: Journal of Renewable and Sustainable Energy (ISSN: 1941-7012) (DOI: http://dx.doi.org/10.1063/1.4940025), vol: 8, issue: 1, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1063/1.4940025

Demonstration of synchronised scanning Lidar measurements of 2D velocity fields in a boundary-layer wind tunnel

van Dooren, M F ; Kühn, M. ; Petrovic, V. ; Bottasso, C. L. ; Campagnolo, F. ; Sjöholm, Mikael ; Angelou, Nikolas ; Mikkelsen, Torben Krogh ; Croce, A. ; Zasso, A.
in journal: Journal of Physics: Conference Series (Online) (ISSN: 1742-6596) (DOI: http://dx.doi.org/10.1088/1742-6596/753/7/072032), vol: 753, 2016
Presented at: The Science of Making Torque from Wind , 2016, Munich

Type: Conference article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1088/1742-6596/753/7/072032

Characterization of wind velocities in the wake of a full scale wind turbine using three ground-based synchronized WindScanners

Yazicioglu, Hasan ; Angelou, Nikolas ; Mikkelsen, Torben Krogh ; Trujillo, Juan-José
in journal: Journal of Physics: Conference Series (Online) (ISSN: 1742-6596) (DOI: http://dx.doi.org/10.1088/1742-6596/753/3/032032), vol: 753, 2016

Type: Conference article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1088/1742-6596/753/3/032032

Detailed field test of yaw-based wake steering

Fleming, P. ; Churchfield, M. ; Scholbrock, A. ; Clifton, A. ; Schreck, S. ; Johnson, K. ; Wright, A. ; Gebraad, P. ; Annoni, J. ; Naughton, B. ; Berg, J. ; Herges, T. ; White, J. ; Mikkelsen, Torben Krogh ; Sjöholm, Mikael ; Angelou, Nikolas
in journal: Journal of Physics: Conference Series (Online) (ISSN: 1742-6596) (DOI: http://dx.doi.org/10.1088/1742-6596/753/5/052003), vol: 753, 2016
Presented at: The Science of Making Torque from Wind , 2016, Munich

Type: Conference article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1088/1742-6596/753/5/052003

Using High-Fidelity Computational Fluid Dynamics to Help Design a Wind Turbine Wake

Churchfield, Matthew J. ; Wang, Qi ; Scholbrock, A. ; Herges, T. ; Mikkelsen, Torben Krogh ; Sjöholm, Mikael
in journal: Journal of Physics: Conference Series (Online) (ISSN: 1742-6596) (DOI: http://dx.doi.org/10.1088/1742-6596/753/3/032009), vol: 753, 2016
Presented at: The Science of Making Torque from Wind , 2016, Munich

Type: Conference article (Peer reviewed)

Status: Published     |    År: 2016     |    DOI: http://dx.doi.org/10.1088/1742-6596/753/3/032009

  

Long-Range WindScanner System   - Remote Sensing 08 00896

Publications 2015

 
Application of lidars for assessment of wind conditions on a bridge site

Jakobsen, J. B. ; Cheynet, Etienne ; Snæbjörnsson, Jonas ; Mikkelsen, Torben Krogh ; Sjöholm, Mikael ; Angelou, Nikolas ; Hansen, Per ; Mann, Jakob ; Svardal, Benny ; Kumer, Valerie ; Reuder, Joachim
part of: Proceedings of the 14th International Conference on Wind Engineering, 2015,
Presented at: 14th International Conference on Wind Engineering, 2015, Porto Alegre

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2015

Remote Sensing for Wind Energy

Pena Diaz, Alfredo ; Hasager, Charlotte Bay ; Badger, Merete ; Barthelmie, Rebecca Jane ; Bingöl, Ferhat ; Cariou, Jean-Pierre ; Emeis, Stefan ; Frandsen, Sten Tronæs ; Harris, Michael ; Karagali, Ioanna ; Larsen, Søren Ejling ; Mann, Jakob ; Mikkelsen, Torben Krogh ; Pitter, Mark ; Pryor, Sara ; Sathe, Ameya ; Schlipf, David ; Slinger, Chris ; Wagner, Rozenn
Publisher: DTU Wind Energy, Report name: Remote Sensing for Wind Energy, Number: DTU-Wind-Energy- E-Report-0084(EN), (ISBN: 978-87-93278-34-9), pages: 260

Type: Report

Status: Published     |    Year: 2015

Polarization Diversity Image-Reject Homodyne Receiver for Directional Radial Velocity Measurements in Light Detection and Ranging (LIDAR) Instruments

Abari, Farzad Cyrus Foroughi (Inventor) ; Mikkelsen, Torben Krogh (Inventor) ; Mann, Jacob (Inventor) ; Pedersen, Anders Tegtmeier (Inventor) ; Peucheret, Christophe (Inventor) ; Sjoholm, Mikael (Inventor)
Patent no.: WO2015044370, Date: 02-04-2015

Type: Patent

Status: Published     |    Year: 2015  
 

Investigation of wake interaction using full-scale lidar measurements and large eddy simulation

Machefaux, Ewan ; Larsen, Gunner Chr. ; Troldborg, Niels ; Hansen, Kurt Schaldemose ; Angelou, Nikolas ; Mikkelsen, Torben Krogh ; Mann, Jakob
in journal: Wind Energy (ISSN: 1095-4244) (DOI: http://dx.doi.org/10.1002/we.1936), 2015

Type: Journal article (Peer reviewed)

Status: E-pub ahead of print     |    Year: 2015     |    DOI: http://dx.doi.org/10.1002/we.1936

High Resolution Vertical Wind Profile Measurements

Pedersen, Anders Tegtmeier ; Angelou, Nikolas ; Mikkelsen, Torben Krogh
part of: Book of Abstracts - WindTech 2015 (ISBN: 978-0-7714-3099-2), pages: 21-22, 2015, WindEEE Research Institute,
Presented at: 2nd International Conference on Future Technologies in Wind Energy, 2015, London, ON

Type: Conference abstract in proceedings (Peer reviewed)

Status: Published     |    Year: 2015

 

3D Measurements and Modelling of Wake Flow Around a Full-Scale Vertical Axis Wind Turbine (Nenuphar)

Sjöholm, Mikael ; Angelou, Nikolas ; Hansen, Kasper Hjorth ; Mikkelsen, Torben Krogh ; Kluczewska-Bordier, Joanna ; Beneditti, Pascal ; Immas, Alexandre ; Parneix, Nicolas ; Silvert, Frederic
part of: Book of Abstracts - WindTech 2015 (ISBN: 978-0-7714-3099-2), pages: 71-72, 2015, WindEEE Research Institute,
Presented at: 2nd International Conference on Future Technologies in Wind Energy, 2015, London, ON

Type: Conference abstract in proceedings (Peer reviewed)

Status: Published     |    Year: 2015

Variations of the Wake Height over the Bolund Escarpment Measured by a Scanning Lidar

Lange, Julia
; Mann, Jakob ; Angelou, Nikolas ; Berg, Jacob ; Sjöholm, Mikael ; Mikkelsen, Torben Krogh
in journal: Boundary-Layer Meteorology (ISSN: 0006-8314) (DOI: http://dx.doi.org/10.1007/s10546-015-0107-8), 2015

Type: Journal article (Peer reviewed)

Status: E-pub ahead of print     |    Year: 2015     |    DOI: http://dx.doi.org/10.1007/s10546-015-0107-8

  
Final Report WindScanner.dk
 

WINDSCANNER.DK - A New Danish Mobile Remote Sensing-based Infrastructure for
Wind Energy and Turbulence

Research: Design, Establishment and Operation 2009-2014

Publications 2014

 
Lidar-based Research and Innovation at DTU Wind Energy – a Review
Mikkelsen, Torben.
In: Journal of Physics: Conference Series (Online), Vol. 524, No. 1, 012007, 2014.
DOI: 10.1088/1742-6596/524/1/012007

Two-Dimensional Rotorcraft Downwash Flow Field Measurements by Lidar-Based Wind Scanners with Agile Beam Steering.
Sjöholm, Mikael; Angelou, Nikolas; Hansen, Per; Hansen, Kasper Hjorth; Mikkelsen, Torben; Haga, Steinar; Silgjerd, Jon Arne; Starsmore, Neil. In: Journal of Atmospheric and Oceanic Technology, Vol. 31, 2014, p. 930-937. DOI: 10.1175/JTECH-D-13-00010.1

Laser scanning of a recirculation zone on the Bolund escarpment

Publications 2013

 
Full two-dimensional rotor plane inflow measurements by a spinner-integrated wind lidar
Mikael Sjöholm1, Anders Tegtmeier Pedersen1, Nikolas Angelou1, Farzad Foroughi Abari1,Torben Mikkelsen1, Mike Harris2, Chris Slinger2, and Stefan Kapp3
(1) Department of Wind Energy, Technical University of Denmark, DTU Risø Campus, Roskilde, Denmark (2) ZephIR Ltd., Ledbury, United Kingdom (3) Robert Bosch GmbH, Future Systems Industrial Technology, Stuttgart, Germany misj@dtu.dk
Presented at EWEA 2013, Vienna, Austria

A spinner-integrated wind lidar for enhanced wind turbine control.
Mikkelsen, Torben; Angelou, Nikolas; Hansen, Kasper Hjorth; Sjöholm, Mikael; Harris, M.; Slinger, C.; Hadley, P.; Scullion, R.; Ellis, G.; Vives, G.
In: Wind Energy, Vol. 16, 2013, p. 625–643.
DOI: 10.1002/we.1564

Full two-dimensional rotor plane inflow measurements by a spinner-integrated wind lidar
Mikael Sjöholm et.al.
Poster presented at EWEA 2013, 4-7 February, Vienna

Full-Scale Field Test of a Blade-Integrated Dual-Telescope Wind Lidar
Anders Tegtmeier Pedersen et. al.
Poster presented at EWEA 2013, 4-7 February, Vienna

Publications 2012

 
Dissemination laser wind techniques
T. Mikkelsen and Søren Knudsen
In: International Innovation Eurofocus, december 2012, p. 58-60

A spinner-integrated wind lidar for enhanced wind turbine control

T. Mikkelsen1, N. Angelou1, K. Hansen1, M. Sjöholm1, M. Harris2, C. Slinger2, P. Hadley2, R. Scullion2, G. Ellis2 and G. Vives2
1- Department of Wind Energy, Technical University of Denmark, DTU Risø Campus, Frederiksborgvej 399, 4000 Roskilde, Denmark
2- ZephIR Ltd., Natural Power, The Old Barns, Fairoaks Farm, Hollybush, Ledbury HR8 1EU, UK

Determining the Velocity Fine Structure by a Laser Anemometer in VAD operation
Leif Kristensen, Peter Kirkegaard, and Torben Mikkelsen
DTU Wind Energy E–0008(EN), August 2012

WindScanner.eu - a new Remote Sensing Research Infrastructure for On- and Offshore Wind Energy
Torben Mikkelsen et. al.
Paper presented at WEMEP 2012. International Conference on Wind Energy Materials, Engineering and Policies at BITS Hyderabad, 22nd - 23rd November 2012, HYDERABAD (South INDIA).

Laser scanning of a recirculation zone on the Bolund escarpment.
Mann, Jakob; Angelou, Nikolas; Sjöholm, Mikael; Mikkelsen, Torben
In: Extended Abstracts of Presentations from the 16th International Symposium for the Advancement of Boundary-Layer Remote Sensing. Steering Committee of the 16th International Symposium for the Advancement of Boundary-Layer Remote Sensing, 2012. p. 19-22.

Helicopter downwash measured by continuous-wave Doppler lidars with agile beam steering
Sjöholm, Mikael; Angelou, Nikolas; Hansen, Per; Hansen, Kasper Hjorth; Mikkelsen, Torben; Haga, Steinar; Silgjerd, Jon Arne ; Starsmore, Neil
In: Extended Abstracts of Presentations from the 16th International Symposium for the Advancement of Boundary-Layer Remote Sensing. Steering Committee of the 16th International Symposium for the Advancement of Boundary-Layer Remote Sensing, 2012. p. 267-270.

First measurements by the DTU wind energy short range windscanner
Sjöholm, Mikael; Angelou, Nikolas; Hansen, Kasper Hjorth; Mann, Jakob; Mikkelsen, Torben
2012. Poster session presented at EWEA 2012 - European Wind Energy Conference & Exhibition, Copenhagen, Denmark.

Demonstration of short-range wind lidar in a high-performance wind tunnel
Anders Tegtmeier Pedersen, Belen Fernández Montes, Jens Engholm Pedersen, Michael Harris, and Torben Mikkelsen
Poster session presented at EWEA 2012 - European Wind Energy Conference & Exhibition, Copenhagen, Denmark

Patents

Rotating prism scanning device and method for scanning
Torben Mikkelsen, Jakob Mann and Morten Nielsen
Patent no. WO 2009/155924 A1, published 2009
Full text (PDF)

Reports

 
Determining the Velocity Fine Structure by a Laser Anemometer with Fixed Orientation
Leif Kristensen, Peter Kirkegaard and Torben Mikkelsen
Risø-R- 1762(EN), 2011, ISBN 9788755038400, 33 p. Full text (PDF) Spectral Coherence Along a Lidar-Anemometer Beam
Leif Kristensen, Peter Kirkegaard, Jakob Mann, Torben Mikkelsen, Morten Nielsen, and Mikael Sjöholm
Risø-R-1744(EN). October 2010, ISBN 978-87-550-3840-0, 20 p.
Full text (PDF)

LIDAR Wind Speed Measurements from a Rotating Spinner: “SpinnerEx 2009”
Nikolas Angelou, Torben Mikkelsen, Kasper H. Hansen, Mikael Sjöholm, Michael Harris
Risø-R-1741, Risø DTU, August 2010, ISBN 978-87-550-3836-3, 79 p.
Full text (PDF)

Prediction of Load and Power Fluctuations from Wind Turbine Spinner-integrated Wind LIDAR Measurements .
T Mikkelsen (Oct 2009) 6 p.


Journal articles

LIDAR remote sensing
Stuart Bradley and Torben Mikkelsen
In: International Sustainable Energy Review, vol 5, issue 3, LIDARS Supplement, p 2-7

Measurement of turbulence spectra using scanning pulsed wind lidars
Ameya Sathe and Jakob Mann
In: Journal of Geophysical Research, vol 177, 2012, p D01201 (11 pages)
DOI: 10.1029/2011JD016786

Risø Ph.D. Summer School 2010

LIDAR wind speed measurements from a rotating spinner: “SpinnerEx 2009”
Angelou N., Mikkelsen T., Hansen H.K., Sjöholm M., Harris M.
PPT presentation

Meteorologische Zeitschrift

Spatial averaging-effects on turbulence measured by a continuous-wave coherent lidar
M Sjöholm, T Mikkelsen, J Mann, K Enevoldsen, M Courtney. Meteorologische Zeitschrift (2009) 18 281-287

Comparison of 3D turbulence measurements using three staring wind lidars and a sonic anemometer
J Mann, J-P Cariou, M Courtney, P Parmentier, T Mikkelsen, R Wagner, PJP Lindelöw, M Sjöholm, K Enevoldsen. Meteorologische Zeitschrift (2009) 18 135-140

Wind Energy

Offshore wind profiling using light detection and ranging measurements
D Pena, C B Hasager, S-E Gryning, M Courtney, I Antoniou, T Mikkelsen. Wind Energy (2009) 12 105-124

Global Challenges - Regional Opportunities. Stockholm 12 - 13 Nov. 2008

Windscanner: - a Facility for Wind and Turbulence Measurements around large Wind Turbines
T Mikkelsen
Full text (PDF)


EWEC 2010

Lidar wind speed measurements from a rotating spinner
Torben Mikkelsen, Kasper Hansen, Nikolas Angelou, Mikael Sjöholm, Michael Harris, Paul Hadley, Richard Scullion, Gary Ellis
Full text (PDF)

EWEC 2009

On mean wind and turbulence profile measurements from ground-based wind lidars: limitations in time and space resolution with continuous wave and pulsed lidar systems - a review
Torben Mikkelsen
Full text (PDF)

EWEC 2008

Wind Scanner: A full-scale Laser Facility for Wind and Turbulence Measurements around large Wind Turbines
T Mikkelsen, J Mann and M Courtney

ISARS 2010

Spectral analysis of wind turbulence measured by a Doppler Lidar for velocity fine structure and coherence studies
Mikael Sjöholm, Torben Mikkelsen, Leif Kristensen, Jakob Mann, Peter Kirkegaard, Stefan Kapp, David Schlipf, and Juan José Trujillo
Full text (PDF)

ISARS 2008

Windscanner: 3-D wind and turbulence measurements from three steerable doppler lidars
T Mikkelsen, J Mann, M Courtney and M Sjöholm
Full text (PDF)

Comparison of 3D turbulence measurements using three staring wind lidars and a sonic anemometer
J Mann, J-P Cariou, M S Courtney, R Parmentier, T Mikkelsen, R Wagner, P Lindelöw, M Sjöholm and K Enevoldsen
Full text (PDF)

Time series analysis of continuous-wave coherent Doppler Lidar wind measurements
M Sjöholm, T Mikkelsen, J Mann, K Enevoldsen and M Courtney
Full text (PDF)

Testing and comparison of lidars for profile and turbulence measurements in wind energy
M Courtney, R Wagner and P Lindelöw
Full text (PDF)

Wind shear proportional errors in the horizontal wind speed sensed by focused, range gated lidars
P Lindelöw, M Courtney, R Parmentier and J P Cariou
Full text (PDF)