Photo of Robert Flemming Mikkelsen
  • Nils Koppels Allé, 403, 223

    2800 Kgs. Lyngby

    Denmark

19972021

Research output per year

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Research Output

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Journal article
2019

Analytical body forces in numerical actuator disc model of wind turbines

Sørensen, J. N., Nilsson, K., Ivanell, S., Asmuth, H. & Mikkelsen, R. F., 2019, In : Renewable Energy. 147, p. 2259-2271 13 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Helical self-similarity of tip vortex cores

Okulov, V., Kabardin, I. K., Mikkelsen, R. F., Naumov, I. & Sørensen, J. N., 2019, In : Journal of Fluid Mechanics. 859, p. 1084-1097

Research output: Contribution to journalJournal articleResearchpeer-review

2018

Experimental Investigation of Static Stall Hysteresis and 3-Dimensional Flow Structures for an NREL S826 Wing Section of Finite Span

Sarlak, H., Frère, A., Mikkelsen, R. F. & Sørensen, J. N., 2018, In : Energies. 11, 6, 21 p., 1418.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
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335 Downloads (Pure)
2017

Loss of efficiency in a coaxial arrangement of a pair of wind rotors

Okulov, V. L., Naumov, I. V., Tsoy, M. A. & Mikkelsen, R. F., 2017, In : Thermophysics and Aeromechanics. 24, 4, p. 545-551

Research output: Contribution to journalJournal articleResearchpeer-review

Power Properties of Two Interacting Wind Turbine Rotors

Okulov, V., Mikkelsen, R. F., Sørensen, J. N., Naumov, I. & Tsoy, M. A., 2017, In : Journal of Energy Resources Technology. 139, 5, 6 p., 051210-1.

Research output: Contribution to journalJournal articleResearchpeer-review

Self-similarity of far wake behind tandem of two disks

Okulov, V., Litvinov, I. V., Naumov, I. V. & Mikkelsen, R. F., 2017, In : Journal of Engineering Thermophysics. 26, 2, p. 154-159

Research output: Contribution to journalJournal articleResearchpeer-review

The Triple Spar campaign: Model tests of a 10MW floating wind turbine with waves, wind and pitch control

Bredmose, H., Lemmer, F., Borg, M. B., Pegalajar-Jurado, A. M., Mikkelsen, R. F., Larsen, T. S., Fjelstrup, T., Yu, W., Lomholt, A. K., Boehm, L. & Armendariz, J. A., 2017, In : Energy Procedia. 137, p. 58-76

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
613 Downloads (Pure)

Turbulence and entrainment length scales in large wind farms

Andersen, S. J., Sørensen, J. N. & Mikkelsen, R. F., 2017, In : Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 375, 2091, p. 20160107-20160107 1 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
1 Downloads (Pure)
2016

Comparison of the near-wake between actuator-line simulations and a simplified vortex model of a horizontal-axis wind turbine

Sarmast, S., Segalini, A., Mikkelsen, R. F. & Ivanell, S., 2016, In : Wind Energy. 19, 3, p. 471–481 11 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Estimation of wake propagation behind the rotors of wind-powered generators

Naumov, I. V., Mikkelsen, R. F. & Okulov, V., 2016, In : Thermal Engineering. 63, 3, p. 208-213 6 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
300 Downloads (Pure)

Experimental investigation of wake evolution behind a couple of flat discs in a hydrochannel

Naumov, I. V., Litvinov, I. V., Mikkelsen, R. F. & Okulov, V., 2016, In : Thermophysics and Aeromechanics. 23, 5, p. 657-666

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
173 Downloads (Pure)
2015

Comparison of far wakes behind a solid disk and a three-blade rotor

Litvinov, I. V., Naumov, I. V., Okulov, V. & Mikkelsen, R. F., 2015, In : Journal of Flow Visualization and Image Processing. 22, 4, p. 175-183

Research output: Contribution to journalJournal articleResearchpeer-review

Efficiency of operation of wind turbine rotors optimized by the Glauert and Betz methods

Okulov, V., Mikkelsen, R. F., Litvinov, I. V. & Naumov, I. V., 2015, In : Technical Physics. 60, 11, p. 1632-1636 5 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Large-eddy simulations of the Lillgrund wind farm

Nilsson, K., Ivanell, S., Hansen, K. S., Mikkelsen, R. F., Sørensen, J. N., Breton, S-P. & Henningson, D., 2015, In : Wind Energy. 18, 3, p. 449–467 19 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Simulation of wind turbine wakes using the actuator line technique

Sørensen, J. N., Mikkelsen, R. F., Henningson, D. S., Ivanell, S., Sarmast, S. & Andersen, S. J., 2015, In : Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 373, 2035, 16 p., 20140071.

Research output: Contribution to journalJournal articleResearchpeer-review

2014

A regular Strouhal number for large-scale instability in the far wake of a rotor

Okulov, V., Naumov, I. V., Mikkelsen, R. F., Kabardin, I. K. & Sørensen, J. N., 2014, In : Journal of Fluid Mechanics. 747, p. 369-380

Research output: Contribution to journalJournal articleResearchpeer-review

A simple atmospheric boundary layer model applied to large eddy simulations of wind turbine wakes

Troldborg, N., Sørensen, J. N., Mikkelsen, R. F. & Sørensen, N. N., 2014, In : Wind Energy. 17, 4, p. 657-669

Research output: Contribution to journalJournal articleResearchpeer-review

Diagnostics of BubbleMode Vortex Breakdown in Swirling Flow in a Large-Aspect-Ratio Cylinder

Kulikov, D. V., Mikkelsen, R. F., Naumov, I. & Okulov, V., 2014, In : Technical Physics Letters. 40, 2, p. 181-184 4 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Mutual inductance instability of the tip vortices behind a wind turbine

Sarmast, S., Dadfar, R., Mikkelsen, R. F., Schlatter, P., Ivanell, S., Sørensen, J. N. & Henningson, D. S., 2014, In : Journal of Fluid Mechanics. 755, p. 705-731

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
359 Downloads (Pure)

Small scale experimental study of the dynamic response of a tension leg platform wind turbine

Hansen, A. M., Laugesen, R., Bredmose, H., Mikkelsen, R. F. & Psichogios, N., 2014, In : Journal of Renewable and Sustainable Energy. 6, 5, p. 053108 26 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Stagnation zone formation on the axis of a closed vortex flow

Naumov, I. V., Okulov, V. & Mikkelsen, R. F., 2014, In : Thermophysics and Aeromechanics. 21, 6, p. 767-770

Research output: Contribution to journalJournal articleResearchpeer-review

Synthetic atmospheric turbulence and wind shear in large eddy simulations of wind turbine wakes

Keck, R-E., Mikkelsen, R. F., Troldborg, N., de Maré, M. & Hansen, K. S., 2014, In : Wind Energy. 17, 8, p. 1247–1267

Research output: Contribution to journalJournal articleResearchpeer-review

2013

Simulation of the inherent turbulence and wake interaction inside an infinitely long row of wind turbines

Andersen, S. J., Sørensen, J. N. & Mikkelsen, R. F., 2013, In : Journal of Turbulence. 14, 4, p. 1-24

Research output: Contribution to journalJournal articleResearchpeer-review

2012

Flow diagnostics downstream of a tribladed rotor model

Naumov, I. V., Rahmanov, V. V., Okulov, V., Velte, C. M., Meyer, K. E. & Mikkelsen, R. F., 2012, In : Thermophysics and Aeromechanics. 19, 2, p. 171-181

Research output: Contribution to journalJournal articleResearchpeer-review

2011
2010

Calibration and Validation of the Dynamic Wake Meandering Model for Implementation in an Aeroelastic Code

Aagaard Madsen, H., Larsen, G. C., Larsen, T. J., Troldborg, N. & Mikkelsen, R. F., 2010, In : Journal of Solar Energy Engineering. 132, 4, p. 041014 (14 pages)

Research output: Contribution to journalJournal articleResearchpeer-review

Numerical simulations of wake characteristics of a wind turbine in uniform inflow

Troldborg, N., Sørensen, J. N. & Mikkelsen, R. F., 2010, In : Wind Energy. 13, 1, p. 86-99

Research output: Contribution to journalJournal articleResearchpeer-review

Validation and modification of the Blade Element Momentum theory based on comparisons with actuator disc simulations

Aagaard Madsen, H., Bak, C., Døssing, M., Mikkelsen, R. F. & Øye, S., 2010, In : Wind Energy. 13, 4, p. 373-389

Research output: Contribution to journalJournal articleResearchpeer-review

2009

Analysis of Numerically Generated Wake Structures

Ivanell, S., Sørensen, J. N., Mikkelsen, R. F. & Henningson, D., 2009, In : Wind Energy. 12, 1, p. 63-80

Research output: Contribution to journalJournal articleResearchpeer-review

Experimental and numerical results on three-dimensional instabilities in a rotating disk-tall cylinder flow

Sørensen, J. N., Gelfgat, A. Y., Naumov, I. V. & Mikkelsen, R. F., 2009, In : Physics of Fluids. 21, 5, p. 054102

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
161 Downloads (Pure)
2006

Experimental investigation of three-dimensional flow instabilities in a rotating lid-driven cavity

Sørensen, J. N., Naumov, I. & Mikkelsen, R. F., 2006, In : Experiments in Fluids. 41, p. 425-440

Research output: Contribution to journalJournal articleResearchpeer-review

Wall correction model for wind tunnels with open test section

Sørensen, J. N., Shen, W. Z. & Mikkelsen, R. F., 2006, In : AIAA Journal. 44, 8, p. 1890-1911

Research output: Contribution to journalJournal articleResearchpeer-review

2005

Tip Loss Correction for Actuator/Navier-Stokes Computations

Shen, W. Z., Sørensen, J. N. & Mikkelsen, R. F., 2005, In : Journal of Solar Energy Engineering. 127, 2, p. 209-213

Research output: Contribution to journalJournal articleResearchpeer-review

Tip loss corrections for wind research turbine computations

Shen, W. Z., Mikkelsen, R. F., Sørensen, J. N. & Bak, C., 2005, In : Wind Energy. 8, 4, p. 457-475

Research output: Contribution to journalJournal articleResearchpeer-review

2001

Modelling and analysis of the flow field around a coned rotor

Mikkelsen, R. F., Sørensen, J. N. & Shen, W. Z., 2001, In : Wind Energy. Vol. 4, p. pp. 1-15

Research output: Contribution to journalJournal articleResearchpeer-review