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PhD Thesis

2020Hann, R. (2020). Atmospheric Ice Accretions, Aerodynamic Icing Penalties, and Ice Protection Systems on Unmanned Aerial Vehicles. PhD Thesis NTNU2020:200, Norwegian University of Science and Technology.

Paper Publications

2024Frey, M., Müller, N.C., Wallisch, J., Hann, R. (2023). UAV Icing: Validation of a numerical model to calculate the temperature of an ice protection system for a propeller of a UAV. AIAA SciTech Forum. AIAA 2024-0871.doi.org/10.2514/6.2024-0871
 Hann, R., Borup, T. B. (2024. Requirements for UAV Operations in Cold Climates and Icing Conditions. Report. UBIQ Aerospace.
 Deiler, C., Veronesi, F., Raimondo, M., Mora, J., García, P., Frovel, M., Gagnon, B., Browne, T., Hann, R. (2024). Ice Detection Technologies. STO Technical Report, AVT-299 Assessment of Anti-Icing and De-Icing Technologies for Air and Sea Vehicles.
 Veronesi, F., Raimondo, M., Mingione, G., Martin, B., Hann, R., Håkonsen, V., Ki-Han, K., Nogues, J.M., Gagnon, B. (2024). Ice Protection Systems. STO Technical Report, AVT-299 Assessment of Anti-Icing and De-Icing Technologies for Air and Sea Vehicles.
 Blanchard, G., Hann, R., Håkonsen, V., Benmeddour, A., Bennani, L., Rouzaud, O. (2024). Computational Modelling and Simulation Methods. STO Technical Report, AVT-299 Assessment of Anti-Icing and De-Icing Technologies for Air and Sea Vehicles.
 Müller, N.C., Hann, R. (2024). UAV Icing: Comparison of the Influence of Icing on a Rotor in Vertical and Horizontal Flight. 20th International Workshop on Atmospheric Icing of Structures (IWAIS).
 Hann, R., Borup, K.T. (2024). Technical requirements for RPAS operations in cold climates. 20th International Workshop on Atmospheric Icing of Structures (IWAIS).
2023Paulsen, I.M.G., Pedersen, Å.Ø., Hann, R., Blanchet, M.-A., Eischeid, I., Van Hazendonk, C., Ravolainen, V.T., Stien, A., Le Moullec, M. (2023). How Many Reindeer? UAV Surveys as an Alternative to Helicopter or Ground Surveys for Estimating Population Abundance in Open LandscapesRemote Sensing, 15(1). doi.org/10.3390/rs15010009
 Högnadottir, S., Gryte, G., Hann, R., Johansen, T.A. (2023). Inner-Loop Control of Fixed-Wing Unmanned Aerial Vehicles in Icing Conditions. AIAA SCITECH Forum. AIAA 2023-1049 doi.org/10.2514/6.2023-1049
 Hann, R., Betlem, P., Deja, K., Ewertowski, M., Harm-Altstädter, B., Jonassen, M., Lampert, A., Laska, M., Sobota, I., Storvold, R., Tomczyk, A., Zagórski, P. (2023) Practical Guidelines for Scientific Application of Uncrewed Aerial Vehicles in SvalbardSESS Report 2022, Svalbard Integrated Arctic Earth Observing System. doi.org/10.5281/zenodo.7371141
 Wallisch, J., Hann, R. (2023). UAV Icing: Intercycle Ice Effects on Aerodynamic Performance. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1400
 Müller, N.C., Hann, R. (2023). UAV Icing: 3D simulations of propeller icing effects and anti-icing heat loads. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1400
 Løw-Hansen, B., Müller, N.C., Coates, E., Johansen, T.A., Hann, R. (2023). Identification of an Electric UAV Propulsion System in Icing Conditions. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1378
 Cheung, M., Johansen, T.A., Hann, R. (2023). UAV Icing: Icing Cases for Validation of Path Planning Method. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1379
 Hann, R., Müller, N.C., Lindner, M., Wallisch, J. (2023). UAV Icing: Experimental validation data for predicting ice shapes at low Reynolds numbers. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1372
 Lindner, M., Wallisch, J., Hann, R. (2023). UAV Icing: Numerical Simulation of Icing Effects on Wing and Empennage. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1384
 Heramarwan, H., Müller, N., Lutz, T., Hann, R. (2023). UAM Icing: Ice Accretion Simulations and Experiments of an eVTOL Rotor. SAE International Conference on Icing of Aircraft, Engines, and Structures. doi.org/10.4271/2023-01-1391
 Enache, A., Wallisch, J., van Beeck, J., Hendrick, P., Hann, R. (2023). Ice Accretion: Image Post-Processing Measurement Techniques for 2D Ice ShapesAerospace, 10(5), 451. doi.org/10.3390/aerospace10050451
 Hann, R. (2023). Numerical Simulation of In-Flight Icing of Unmanned Aerial Vehicles. In: Habashi, W.G. (eds) Handbook of Numerical Simulation of In-Flight Icing. Springer. doi.org/10.1007/978-3-030-64725-4_12-1
 Müller, N.C., Løw-Hansen, B., Borup, K.T., Hann, R. (2023). UAV icing: Development of an ice protection system for the propeller of a small UAVCold Regions Science and Technology, 213, 103938. doi.org/ 10.1016/j.coldregions.2023.103938
 Ghirardelli, M., Kral, S.T., Müller, N.C., Hann, R., Cheynet, E., Reuder, J. (2023). Flow Structure around a Multicopter Drone: A Computational Fluid Dynamics Analysis for Sensor Placement ConsiderationsDrones, 7(7), 467. doi.org/ 10.3390/drones7070467
 Løw-Hansen, B., Hann, R., Stovner, B. N., Johansen, T. A. (2023). UAV Icing: A survey of recent developments in ice detection methods. 22nd IFAC World Congress, Yokohama.
 Wurst, L., Wallisch, J., Hann, R. (2023). CFD icing simulations on a fixed-wing UAV engine inlet. Deutscher Luft- und Raumfahrtkongress (DLRK). doi.org/10.25967/610455
2022Oswald, J.W., Enache, A., Hann, R., Glabeke, G., Lutz, T. (2022). UAV Icing: Experimental and Numerical Study of Glaze Ice. AIAA 2022-1976. AIAA SciTech Forum. doi.org/10.2514/6.2022-1976
 Hann, R.,Betlem, P., Deja, K., Hartvich, F., Jonassen, M., Lampert, A., Laska, M., Sobota, I., Storvold, R., Zagórski P. (2022). Update to Scientific Applications of Unmanned Vehicles in SvalbardSESS Report 2021, Svalbard Integrated Arctic Earth Observing System. doi.org/10.5281/zenodo.5751959
 Meier, K., Hann, R., Skaloud, J., Garreau, A. (2022). Wind Estimation with Multirotor UAVsAtmosphere, 13, 551. doi.org/10.3390/atmos13040551
 Hann, R. (2022). Hazards of In-flight Icing on Unmanned Aircraft. Conference paper. SCI-328 Symposium on ‘Flight Testing of Unmanned Aerial Systems (UAS).
 Cheung, M., Hann, R., Johansen, T.A. (2022). UAV Icing: A Unified Icing Severity Index Derived from Performance Degradation. AIAA Atmospheric and Space Environments Conference. doi.org/10.2514/6.2022-3906
 Wallisch, J., Hann, R. (2022). UAV Icing: Experimental Investigation of Ice Shedding Times with an Electrothermal De-Icing System. AIAA Atmospheric and Space Environments Conference. doi.org/10.2514/6.2022-3905
 Müller, N., Hann, R. (2022). UAV Icing: A Performance Model for a UAV Propeller in Icing Conditions. AIAA Atmospheric and Space Environments Conference. doi.org/10.2514/6.2022-3903
 Løw-Hansen, B., Hann, R., Johansen, T.A. (2022). UAV Icing: Ice Shedding Detection Method for an Electrothermal De-Icing System. AIAA Atmospheric and Space Environments Conference. doi.org/10.2514/6.2022-3904
 Laurendeau, É.,. Bourgault-Côté, S., Ozcer, I., Hann, R., Radenac, E., Pueyo, A. (2022). Summary from the 1st AIAA Ice Prediction Workshop. AIAA Atmospheric and Space Environments Conference. doi.org/10.2514/6.2022-3398
 Hann, R. (2022). UAV Icing: Challenges for computational fluid dynamic (CFD) tools. International Conference on Computational Fluid Dynamics, ICCFD11.
2021Hann, R., Enache, A., Nielsen, M.C., Stovner, B.N., van Beeck, J., Johansen, T.A., Borup, K.T. (2021). Experimental Heat Loads for Electrothermal Anti-Icing and De-Icing on UAVsAerospace, 8(3), 83. doi.org/10.3390/aerospace8030083
 Hann, R.,Altstädter, B., Betlem, P., Deja, K., Dragańska-Deja K., Ewertowski, M., Hartvich, F., Jonassen, M., Lampert, A., Laska, M., Sobota, I., Storvold, R., Tomczyk, A., Wojtysiak, K. Zagórski P. (2021). Scientific Applications of Unmanned Vehicles in SvalbardSESS Report 2020, Svalbard Integrated Arctic Earth Observing System. doi.org/10.5281/zenodo.4293283
 Jawak, S.D., Andersen, B.N., Pohjola, V., Godøy, Ø., Hübner, C., Jennings, I., Ignatiuk, D., Holmen, K., Sivertsen, A., Hann, R., Tømmervik, H., Kääb, A., Błaszczyk, M., Salzano, R., Luks, B., Høgda, K., Storvold, R., Nilsen, L., Salvatori, R., Krishnan, K.P., Chatterjee, S., Lorentzen, D.A., Erlandsson, R., Lauknes, T.R., Malnes, E., Karlsen, S.R., Enomoto, H., Fjæraa, A.M., Zhang, J., Marty, S., Nygård, K.O., Lihavainen, H. (2021). SIOS’s Earth Observation (EO), Remote Sensing (RS), and Operational Activities in Response to COVID-19Remote Sensing, 13(4), 712. doi.org/10.3390/rs13040712
 Sørensen, K.L., Borup, K.T., Hann, R., Bernstein, B., Hansbø, M. (2021). UAV Atmospheric Icing Limitations: Climate Report for Norway and Surrounding Regions. Report. UBIQ Aerospace.
 Hann, R., Johansen, T.A. (2021). UAV icing: the influence of airspeed and chord length on performance degradationAircraft Engineering and Aerospace Technology, Vol. 93, No. 5. doi.org/10.1108/AEAT-06-2020-0127
 Müller, N., Hann, R., Lutz, T. (2021). UAV Icing: Numerical Simulation of Propeller Ice Accretion. AIAA 2021-2673. AIAA Aviation 2021 Forum. doi.org/10.2514/6.2021-2673
 Nicu, I.C., Rubensdotter, L., Stalsberg, K., Nau, E. (2021). Coastal Erosion of Arctic Cultural Heritage in Danger: A Case Study from Svalbard, NorwayWater, 13(6), 784. doi.org/10.3390/w13060784 (Hann, R. contribution: Drone mapping)
 Haaland, O.M., Wenz, A.W., Gryte, K., Hann, R., Johansen, T.A. (2021). Detection and Isolation of Propeller Icing and Electric Propulsion System Faults in Fixed-Wing UAVs. In 2021 International Conference on Unmanned Aircraft Systems (ICUAS), pp. 377-386, IEEE. doi.org/10.1109/ICUAS51884.2021.9476695
 Hermanson, M.H., Isaksson, E., Hann, R., Ruggirello, R.M., Teixeira, C., Muir, D.C.G. (2021). Historic Atmospheric Organochlorine Pesticide and Halogenated Industrial Compound Inputs to Glacier Ice Cores in Antarctica and the ArcticACS Earth Space Chem, 5, 9, 2534–2543. doi.org/10.1021/acsearthspacechem.1c00211
 Dachauer, A., Hann, R., and Hodson, A.J.: Aerodynamic roughness length of crevassed tidewater glaciers from UAV mappingThe Cryosphere, 15, 5513–5528, 2021. doi.org/ 10.5194/tc-15-5513-2021
2020Hann, R., Johansen, T.A. (2020). Unsettled Topics in Unmanned Aerial Vehicle Icing. SAE International, SAE EDGE Research Report EPR2020008. DOI: 10.4271/EPR2020008
 Hermanson, M.H., Isaksson E., Hann R., Teixeira C.F., Muir D.C.G. (2020). Deposition of Polychlorinated Biphenyls to Firn and Ice Cores at Opposite Polar Sites: Site M, Dronning Maud Land, Antarctica, and Holtedahlfonna, Svalbard. ACS Earth and Space Chemistry 4 (11), pp. 2096-2104. DOI: 10.1021/acsearthspacechem.0c00227
 Wallisch, J., Hann, R. (2020). Design of a Low-Speed Icing Wind Tunnel for UAVs. Deutsche Gesellschaft für Luft- und Raumfahrt. DOI: 10.25967/530188
 Hermanson, M.H., Isaksson E., Hann R., Teixeira C.F., Muir D.C.G. (2020). Atmospheric deposition of organochlorine pesticides and industrial compounds to seasonal surface snow at four glacier sites on Svalbard, 2013-2014. Environmental Science & Technolgy, vol. 54, issue 15, pp. 9265–9273. DOI: 10.1021/acs.est.0c01537
 Hovenburg, A. R., Andrade, F. A. A., Hann, R., Rodin, C. D., and Johansen, T. A., Storvold, R. (2020). Long range path planning using an aircraft performance model for battery powered sUAS equipped with icing protection system. IEEE Journal on Miniaturization for Air and Space Systems. DOI: 10.1109/JMASS.2020.3003833
 Hann, R., Hearst, R.J., Sætran, L.R., Bacchi, T. (2020). Experimental and Numerical Icing Penalties of an S826 Airfoil at Low Reynolds Numbers. Aerospace, 7(4), 46. [Data] DOI: 10.3390/aerospace7040046
 Narum, E.F.L., Hann, R., Johansen, T.A. (2020). Optimal Mission Planning for Fixed-Wing UAVs with Electro-Thermal Icing Protection and Hybrid-Electric Power Systems. International Conference on Unmanned Aircraft Systems (ICUAS). DOI: 10.1109/ICUAS48674.2020.9214054
  
2019Hann, R., Hermanson, M. (2019). Derivation of flow rate and calibration method for high-volume air samplersAtmospheric Measurement Techniques12(9), 4725-4731. DOI: 10.5194/amt-12-4725-2019
 Hann, R. (2019). UAV Icing: Ice Accretion Experiments and Validation. SAE Technical Paper. No. 2019-01-2037. DOI: 10.4271/2019-01-2037
 Hann, R., Borup, K., Zolich, A., Sorensen, K., Vestad, H., Steinert, M., & Johansen, T.A. (2019). Experimental Investigations of an Icing Protection System for UAVs. SAE Technical Paper. No. 2019-01-2038. DOI: 10.4271/2019-01-2038
 Fajt, N., Hann, R., Lutz, T. (2019). The Influence of Meteorological Conditions on the Icing Performance Penalties on a UAV Airfoil. 8th European Conference for Aeronautics and Aerospace Sciences (EUCASS). DOI: 10.13009/EUCASS2019-240
 Winter, A., Hann, R., Wenz, A., Gryte, K., & Johansen, T. A. (2019). Stability of a Flying Wing UAV in Icing Conditions. 8th European Conference for Aeronautics and Aerospace Sciences (EUCASS). DOI: 10.13009/EUCASS2019-906
 Hann, R. (2019). UAV Icing: Comparison of LEWICE and FENSAP-ICE for Anti-Icing Loads. AIAA Scitech Forum. DOI: 10.2514/6.2019-1286
  
2018Gryte, K., Hann, R., Alam, M., Roháč, J., Johansen, T. A., Fossen, T. I. (2018). Aerodynamic modeling of the skywalker x8 fixed-wing unmanned aerial vehicle. In 2018 International Conference on Unmanned Aircraft Systems (ICUAS) (pp. 826-835). IEEE. DOI: 10.1109/ICUAS.2018.8453370
 Hann, R. (2018). UAV Icing: Comparison of LEWICE and FENSAP-ICE for Ice Accretion and Performance Degradation. AIAA Atmospheric and Space Environments Conference. DOI: 10.2514/6.2018-2861
  
2017Hermanson, M.H., Hann, R., Johnson, G.W. (2017). Response to Comment on “Polychlorinated Biphenyls in Tree Bark near Former Manufacturing and Incinerator Facilities in Sauget, Illinois, United States”. Environ. Sci. Technol. 2017, 51, 8206−8207. DOI: 10.1021/acs.est.7b01688
 Hann, R., Wenz, A., Gryte, K., & Johansen, T. A. (2017). Impact of atmospheric icing on UAV aerodynamic performance. In 2017 Workshop on Research, Education and Development of Unmanned Aerial Systems (RED-UAS) (pp. 66-71). IEEE. DOI: 10.1109/RED-UAS.2017.8101645
  
2016Hermanson, M. H., Hann, R., & Johnson, G. W. (2016). Polychlorinated biphenyls in tree bark near former manufacturing and incineration facilities in Sauget, Illinois, United States. Environmental science & technology, 50(12), 6207-6215. DOI: 10.1021/acs.est.6b01053
  
2015Lutz, T., Arnold, B., Bekiropoulos, D., Illg, J., Krämer, E., Wolf, A., Hann, R., Kamruzzaman, M. (2015). Prediction of flow-induced noise sources of wind turbines and application examples. International Journal of Aeroacoustics, 14(5-6), 675-714. DOI: 10.1260/1475-472X.14.5-6.675
  
2013Hann, R., Wolf, A., Bekiropoulos, D., Lutz, T., Krämer, E. (2013). Numerical investigation on the noise generation of iced wind turbine airfoils. Winterwind Conference.
 Hann, R., (2013). Aeroakustische Analyse Vereister Profile einer Windenergieanlage. Diplomarbeit/ Final-year thesis. University of Stuttgart.
  
2012Hann, R., (2012). Thermische Untersuchng der Eisbildung und des Anti-Icings an einem Rotorblatt für Windenergieanlangen. Studienarbeit/thesis. University of Stuttgart.

Conference Presentations

2024Hann, R. (2024).The icing barrier for clean aviation. NTNU and Rolls Royce Clean Aviation Evening, Trondheim.
 Hermanson, M.H., Isaksson, E, Hann, R., Gabrielsen, G.W.(2024).Frozen Pollutants: Organic Contaminants in Svalbard Snow & Ice. Arctic Frontiers Conference 2024, Tromsø.
 Pearce, D.M., Harcourt, W.D., Gajek, W., Hann, R., Rea, B.R., Benn, D.I., Lovell, H., Spagnolo, M. (2024).Investigating the signature of a tidewater glacier surge behaviour using geomorphologhical, sedimentological and geotechnical data, Borebreen, Svalbard. General Assembly of the European Geosciences Union, EGU24.
 Harcourt, W.D, Gajek, W., Pearce, D., Hann, R., Luckman, A., Rea, B.R., Benn, D.I., James, M.R, Spagnolo, M., Nanni, U.(2024).Surge initiation at the terminus of Borebreen (Svalbard): Drivers and impact on calving. General Assembly of the European Geosciences Union, EGU24.
  
2023Hann, R. (2023).The challenge of atmospheric in-flight icing on RPAS. 8th ISARRA (International Society for Atmospheric Research using Remotely-piloted Aircraft) conference, Bergen.
 Hann, R. (2023) Mapping glaciers & counting reindeer: drone applications in Svalbard. Svalbard Science Conference, Olso.
  
2022Hann, R. (2022).Drone-based mapping of surging Scheelebreen and Vallåkrabreen glaciers in Svalbard. SIOS Online Conference, online.
 Hann, R. (2022). Drone-based mapping of Gruvefjellet in Spring and Summer for cornice risk assessment. SIOS Online Conference, online.
 Hann, R. (2022). UAV Icing – The freezing barrier for the future of aviation. AMOS Days November 2022, Trondheim.
 Hann, R. (2022). Update to Scientific Applications of Unmanned Vehicles in Svalbard. SIOS Polar Night Week 2022, Longyearbyen.
  
2021Hann, R. (2021).SESS Report Release: Scientific Applications of Unmanned Vehicles in Svalbard. SIOS Polar Night Week, Longyearbyen.Hann, R. (2021). Applications of Unmanned Vehicles in Svalbard. Arctic Science Summit Week, online.
 Hann, R. (2021). Synergies between icing on wind turbines and UAVs. Winterwind Conference, online.
 Hann, R. (2021). Hazards of In-flight Icing on Unmanned Aircraft. SAE Business of Automated Mobility (BAM) Forum, online.
 Hann, R. (2021). Applications of Unmanned Vehicles in Svalbard. SIOS Online conference on remote sensing in Svalbard.Hann, R. (2021). How to publish a paper. SCOPE, 1st student-led conference on Polar Environment, Longyearbyen.Hann, R. (2021). The Role of Glacier Crevasses in the Context of Climate Change. Svalbard Science Conference, Olso.Hann, R. (2021).Atmospheric icing as a hazard to unmanned aircraft applications. Arctic Safety Conference, Longyearbyen.Hermanson, M.H., Isaksson, E., Hann, R., Ruggirello, R.M., Teixeira, C., Muir,D.C.G. (2020). A comparison of PCB congener, organochlorine pesticide, and industrial compound burdens in firn and ice cores from Antarctica and Svalbard. SETAC North America 42nd Annual Meeting, online.
  
2020Hann, R. (2020). Applications of Unmanned Aerial Vehicles in Svalbard. Arctic Change Conference, Longyearbyen.
Hann, R. (2020).Overview of Unsettled Topics in UAV Icing. SAE International AeroTech Digital Summit, online.
 Müller, N., Hann, R., Lutz, T. (2020). The Influence of Meteorological Conditions on the Icing Performance Penalties on a UAV Propeller, Deutscher Luft- und Raumfahrtkongress (DLRK), online.
 Lindvall, J., Lee, L., Virk, M.S., Jin, J.Y., Lehtomäki, V., Hann, R., Revstedt, J. (2020). A CFD benchmark study of ice accretion on a wind turbine blade and a comparison to the ice accretion of a rotating blade cylinder model.Winterwind Conference, Åre.
 Hann, R. (2020). Icing on UAVs. Invited talk to the Advanced Modeling & Simulation (AMS) Seminar Series at the National Aeronautics and Space Administration (NASA), Ames.
 Hermanson, M.H., Isaksson, E., Hann, R., Teixeira, C., Muir, D.C.G. (2020). Deposition of polychlorinated biphenyls to ice cores at opposite polar sites: Holtedahlfonna, Svalbard and Site M, Antarctica. SETAC Europe 30th Annual Meeting, Dublin.
Hann, R. (2020). Opportunities and Challenges for Unmanned Aerial Vehicles (UAVs) in the Arctic.SIOS Polar Night Week Conference, Longyearbyen.
  
2019Hann, R., Hodson, A., Jonassen, M. (2019). Glacier Mapping and Wind Estimation with UAVs on Svalbard.Svalbard Science Conference, Olso.
 Hann, R. (2019). Unmanned Aerial Vehicles (UAVs) in Cold Climate and Wind Energy Applications.Winterwind Conference, Umeå.
  
2018Hann, R. (2018). Icing Protection Systems for UAVs in the Arctic. Arctic Change conference.
 Hann, R. (2018). Wind Turbine Noise due to Icing. Wind Turbine Icing & Ice Prevention Forum
 Hann, R. (2018). Icing on Unmanned Aerial Vehicles (UAVs). Wind Turbine Icing & Ice Prevention Forum
  
2017Krøgenes, J., Brandrud, L., Hann, R., Bartl, J., Bracchi, T., & Sætran, L. (2017). Aerodynamic performance of the NREL S826 airfoil in icing conditions. Wind Energy Science Discussions, 1-17.
 Hann, R., Veshniakova, L., Romero, M., Cicilio, P.R. (2017). Cold Climate Wind Energy in Longyearbyen, 78°N. Arctic Change conference.
  
2016Hann, R. (2016). Applications of iced wind turbines noise simulations. Winterwind Conference.
  
2014Hann, R. (2014). Simulation and validation of the aerodynamic performance of iced wind turbine airfoils. Winterwind Conference.
  
2012Hann, R., Neumann, S. O., Miller, A., & Dillingh, J. (2012). Thermal analysis of a heated rotor blade for wind turbines. Winterwind Conference.

Databases