• Nils Koppels Allé, 403, 222

    2800 Kgs. Lyngby

    Denmark

20042019
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Research Output 2005 2019

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Journal article
2019

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
35 Downloads (Pure)

Aerodynamic effect of icing/rain impacts on super-hydrophobic surfaces

Okulova, N., Taboryski, R. J., Sørensen, J. N., Shtork, S. I. & Okulov, V., 2018, In : Aip Conference Proceedings. 2027, 1, 030045.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File

The role of laboratory testing in the development of rotor aerodynamics (review)

Okulov, V., 2018, In : Thermophysics and Aeromechanics. 25, 1, 20 p.

Research output: Contribution to journalJournal articleResearchpeer-review

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

Nonlinear blade element-momentum analysis of Betz-Goldstein rotors

Wood, D. H. & Okulov, V., 2017, In : Renewable Energy. 107, p. 542-549

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

2016

An acentric rotation of two helical vortices of the same circulations

Okulov, V., 2016, In : Regular and Chaotic Dynamics. 21, 3, p. 267–273

Research output: Contribution to journalJournal articleResearchpeer-review

Direct calculation of wind turbine tip loss

Wood, D. H., Okulov, V. & Bhattacharjee, D., 2016, In : Renewable Energy. 95, p. 269-276 8 p.

Research output: Contribution to journalJournal articleResearchpeer-review

292 Downloads (Pure)

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
168 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
271 Downloads (Pure)

Multiple vortex structures in the wake of a rectangular winglet in ground effect

Velte, C. M., Hansen, M. O. L. & Okulov, V. L., 2016, In : Experimental Thermal and Fluid Science. 72, p. 31–39

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File

On the peculiar structure of a helical wake vortex behind an inclined prolate spheroid

Jiang, F., Andersson, H. I., Gallardo, J. P. & Okulov, V., 2016, In : Journal of Fluid Mechanics. 801, p. 1-12

Research output: Contribution to journalJournal articleResearchpeer-review

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

Rotor theories by Professor Joukowsky: Momentum theories

van Kuik, G. A. M., Sørensen, J. N. & Okulov, V. L., 2015, In : Progress in Aerospace Sciences. 73, p. 1-18 18 p.

Research output: Contribution to journalJournal articleResearchpeer-review

The Contribution of Kawada to the Analytical Solution for the Velocity Induced by a Helical Vortex Filament

Fukumoto, Y., Okulov, V. L. & Wood, D. H., 2015, In : Applied Mechanics Reviews. 67, 6, 6 p., 060801.

Research output: Contribution to journalJournal articleResearchpeer-review

The rotor theories by Professor Joukowsky: Vortex theories

Okulov, V. L., Sørensen, J. N. & Wood, D. H., 2015, In : Progress in Aerospace Sciences. 73, p. 19-46 28 p.

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

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

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

164 Downloads (Pure)

Testing of Rotor Vortex Theories Using Betz Optimization

Okulov, V., 2014, In : Doklady Physics. 59, 1, p. 16–20

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
2013

PIV study of the effect of piston position on the in-cylinder swirling flow during the scavenging process in large two-stroke marine diesel engines

Haider, S., Schnipper, T., Obeidat, A., Meyer, K. E., Okulov, V., Walther, J. H. & Mayer, S., 2013, In : Journal of Marine Science and Technology. 18, 1, p. 133-143

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

Rezimy obtekanija vichrevogo generatora

Translated title of the contribution: The flow regimes of the vortical generatorVelte, C. M., Okulov, V. & Naumov, I. V., 2012, In : Technical Physics Letters. 38, 8, p. 54-62

Research output: Contribution to journalJournal articleResearchpeer-review

The Betz–Joukowsky limit: on the contribution to rotor aerodynamics by the British, German and Russian scientific schools

Okulov, V. L. & van Kuik, G. A. M., 2012, In : Wind Energy. 15, 2, p. 335-344

Research output: Contribution to journalJournal articleResearchpeer-review

2011
210 Downloads (Pure)

Alteration of helical vortex core without change in flow topology

Velte, C. M., Okulov, V. & Hansen, M. O. L., 2011, In : Physics of Fluids. 23, 5, p. 051707

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File

Diagnostics of spatial structure of vortex multiplets in a swirl flow

Naumov, I. V., Okulov, V. & Sørensen, J. N., 2011, In : Thermophysics and Aeromechanics. 17, 4, p. 551-558

Research output: Contribution to journalJournal articleResearchpeer-review

706 Downloads (Pure)

Multiple helical modes of vortex breakdown

Sørensen, J. N., Naumov, I. V. & Okulov, V., 2011, In : Journal of Fluid Mechanics. 683, p. 430-441

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
2010

Applications of 2D helical vortex dynamics

Okulov, V. & Sørensen, J. N., 2010, In : Theoretical and Computational Fluid Dynamics. 24, 1-4, p. 395-401

Research output: Contribution to journalJournal articleResearchpeer-review

Explanation of visual diagnostics of multihelix vortex breakdown

Okulov, V., Naumov, I. V. & Meyer, K. E., 2010, In : Doklady Physics. 55, 11, p. 556-560

Research output: Contribution to journalJournal articleResearchpeer-review

Maximum efficiency of wind turbine rotors using Joukowsky and Betz approaches

Okulov, V. & Sørensen, J. N., 2010, In : Journal of Fluid Mechanics. 649, p. 497-508

Research output: Contribution to journalJournal articleResearchpeer-review

Vortex Precession in a Gas-Liquid Flow

Alekseenko, S. V., Kuibin, P. A., Okulov, V. & Shtork, S. I., 2010, In : Heat Transfer Research. 41, 4, p. 467-479

Research output: Contribution to journalJournal articleResearchpeer-review

2009

Chaotic advection and separatrix branching in the Lagrangian diagnostics of flows

Okulov, V., 2009, In : Doklady Physics. 54, 3, p. 134-139

Research output: Contribution to journalJournal articleResearchpeer-review

431 Downloads (Pure)

Helical structure of longitudinal vortices embedded in turbulent wall-bounded flow

Velte, C. M., Hansen, M. O. L. & Okulov, V., 2009, In : Journal of Fluid Mechanics. 619, p. 167-177

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
2699 Downloads (Pure)

The Betz-Joukowsky limit for the maximum power coefficient of wind turbines

Okulov, V. & van Kuik, G. A. M., 2009, In : International Scientific Journal for Alternative Energy and Ecology. 9, p. 106-111

Research output: Contribution to journalJournal articleResearchpeer-review

File
2008

An ideal wind turbine with a finite number of blades

Okulov, V. & Sørensen, J. N., 2008, In : Doklady Physics. 53, 6, p. 337-342

Research output: Contribution to journalJournal articleResearchpeer-review

Refined Betz limit for rotors with a finite number of blades

Okulov, V. & Sørensen, J. N., 2008, In : Wind Energy. 11, 4, p. 415-426

Research output: Contribution to journalJournal articleResearchpeer-review

Self-organized vortex multiplets in swirling flow

Okulov, V., Naumov, I. & Sørensen, J. N., 2008, In : Technical Physics Letters. 34, 8, p. 675-678

Research output: Contribution to journalJournal articleResearchpeer-review

2007

Features of optical diagnostics of oscillation flows

Okulov, V., Naumov, I. & Sørensen, J. N., 2007, In : Journal of Technical Physics. 73, 10, p. 29-35

Research output: Contribution to journalJournal articleResearchpeer-review

Stability of helical tip vortices in a rotor far wake

Okulov, V. & Sørensen, J. N., 2007, In : J. Fluid Mech.. 576, p. 1-25

Research output: Contribution to journalJournal articleResearchpeer-review

Two scenarios of instability development in flow with strong swirling

Naumov, I., Okulov, V. & Sørensen, J. N., 2007, In : Technical Physics Letters. 33, 9, p. 775-778

Research output: Contribution to journalJournal articleResearchpeer-review

2006

Simulation of flow structure in the suction pipe of a hydroturbine by integral characteristics

Kuibin, P. A., Okulov, V. & Pylev, I. M., 2006, In : Heat Transfer Research. 37, 8, p. 675-684

Research output: Contribution to journalJournal articleResearchpeer-review

2005
846 Downloads (Pure)

The velocity field induced by a helical vortex tube

Fukumoto, Y. & Okulov, V., 2005, In : Physics of Fluids. 17, 10, p. 107101

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File

Vortex scenario and bubble generation in a cylindrical cavity with rotating top and bottom

Okulov, V. L., Sørensen, J. N. & Voigt, L. K., 2005, In : European Journal of Mechanics B/Fluids. 24, p. 137-148

Research output: Contribution to journalJournal articleResearchpeer-review