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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

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 UAVsAerospace8(3), 83. DOI: 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 Svalbard. SESS Report 2020, Svalbard Integrated Arctic Earth Observing System. DOI: 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-19. Remote Sensing, 13(4), 712. DOI: 10.3390/rs13040712
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

2020Hann, R. (2020). Applications of Unmanned Aerial Vehicles in Svalbard. Arctic Change conference.
Hann, R. (2020).Overview of Unsettled Topics in UAV Icing. SAE International AeroTech Digital Summit.
 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).
 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.
 Hann, R. (2020). Icing on UAVs. Invited talk to the Advanced Modeling & Simulation (AMS) Seminar Series at the National Aeronautics and Space Administration (NASA).
 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.
Hann, R. (2020). Opportunities and Challenges for Unmanned Aerial Vehicles (UAVs) in the Arctic.SIOS Polar Night Week Conference.
2019Hann, R., Hodson, A., Jonassen, M. (2019). Glacier Mapping and Wind Estimation with UAVs on Svalbard.Svalbard Science Conference.
 Hann, R. (2019). Unmanned Aerial Vehicles (UAVs) in Cold Climate and Wind Energy Applications.Winterwind Conference.
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.