Relevant bibliographies by topics / Air Rotor

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Air Rotor'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Air Rotor"

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Tinney, Charles, John Valdez, and Irene Zhao. "The acoustics of multirotor platforms for urban air mobility." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A292. http://dx.doi.org/10.1121/10.0023567.

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The sound field of hovering rotors has generated tremendous interest in recent years with the prospect of urban air mobility platforms comprising eVTOL type designs. In this presentation, we will review a number of key advancements that have been made with regard to an understanding of the sound field produced by multirotor systems in hover and how it relates to the aerodynamic performance of the rotor. Much of this work is based on laboratory-scale measurements of different configurations starting with multirotor drones comprising quad-copter, hexacopter, and even octocopter arrangements (Tin
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Sun, Jinji, Jianyi Ren, and Haoxi Sun. "A Novel Design of an Inner Rotor for Optimizing the Air-Gap Magnetic Field of Hollow-Cup Motors." Machines 10, no. 5 (2022): 314. http://dx.doi.org/10.3390/machines10050314.

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In order to obtain a high power density, spacecraft usually use hollow-cup motors with trapezoidal air-gap magnetic field waveforms. However, due to structural issues, the hollow-cup motor has the problem that the waveform of the air-gap magnetic field is inconsistent with the ideal trapezoidal waveform, which causes torque ripples. In order to reduce torque ripples, the existing method only changes the structure of PMs; the changed PMs are difficult to magnetize and manufacture, which causes the air-gap magnetic field waveform to be unsuitable as the ideal waveform. This paper proposes a nove
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Gnemmi, Patrick, Kevin Meder, and Christian Rey. "Aerodynamic Performance of a Gun Launched Micro Air Vehicle." International Journal of Micro Air Vehicles 4, no. 4 (2012): 251–72. http://dx.doi.org/10.1260/1756-8293.4.4.251.

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The study deals with the prediction of the aerodynamic performance of the Gun Launched Micro Air Vehicle (GLMAV) platform by using the ANSYS CFX code. A first step consisted of the validation of the numerical simulation on a two-bladed rotor, which has a diameter of 0.20 m. This micro-rotor model is the perfect reproduction at a scale of 1:10 of the rotor bench that ISL had studied in the nineties. The validation was made by the comparison of the computed thrust and torque with the measured ones. These results proved the ability of the ANSYS CFX code to predict the flow field around MAV rotors
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YUAN, Mingchuan, Huixun SUN, Zhibin LI, Qingfeng NIU, and Feng FAN. "Numerical calculation and analysis of aero-acoustic characteristics of tilt rotor in different tilt angles." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 42, no. 2 (2024): 205–13. http://dx.doi.org/10.1051/jnwpu/20244220205.

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The numerical calculation model for the aero-acoustic analysis of a tilt rotor was established by combining the free wake method and the FW-H (Ffowcs Williams-Hawkings) equation. The numerical method was validated by using the tilt rotor′s aero-acoustic test results. The aero-acoustic characteristics of dual tilt rotors that take into account the force and moment trim of an aircraft in its typical transition path were calculated. The unsteady air load of a rotor blade and its noise data in different observational positions were acquired. The acoustic directivity and sound pressure level of the
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Freitas, Felipe Augusto Lustosa Meireles, Ronaldo Barcelos e. Silva, Leonardo Da Rosa Schmidt, Silvana Maldaner, and Lucinéia Fabris. "Análise da potência mecânica de rotores de Savonius de mesma razão de aspecto." Ciência e Natura 42 (February 7, 2020): 33. http://dx.doi.org/10.5902/2179460x40635.

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An experimental performance study of Savonius small rotors is performed in this work. Two Savonius prototypes, two blades and the same aspect ratio, were constructed from vinyl polychloride and use different air flow. Experimental tests allowed the rotation speed of each rotor to be determined for different air flows. It is important to note that the average angular velocity of the smaller rotor is approximately fifty percent higher than the larger rotor. At the same time, the absorption torque on the rotor shaft was measured and the mechanical power of each Savonius wind turbine prototype was
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Zhang, Liu, Zhanpeng Cui, Pengfei Song, Liming Wang, and Xikai Liu. "Sinusoidal Rotor Core Shape for Low Torque Ripple in Hollow-Cup Machines." Energies 17, no. 13 (2024): 3168. http://dx.doi.org/10.3390/en17133168.

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Due to the configuration of coreless stators and two synchronously rotated rotors, hollow-cup machines (HCMs) enjoy the merits of negligible cogging torque and core loss. Consequently, HCMs have been successfully employed as high-speed electric machines in the aerospace field, which requires high precision and low thermal dissipation. However, the permanent magnet (PM) thickness and air-gap length of conventional HCM are uniform, resulting in various harmonics in the air-gap flux density as well as back-EMF. These harmonics inevitably produce an electromagnetic torque ripple, which has not met
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Toylbay, Ozgerishan, Gulzhan Seifulla, Aidos Moldabekov, Dastan Yergaliyev, and Uljalgas Adilbayeva. "THE EFFECT OF SURFACE ROUGHNESS AND ELECTROSTATIC BONDS OF RESIDUAL GASES ON THE SETTLING OF THE GYROSCOPE ROTOR." Вестник КазАТК 132, no. 3 (2024): 110–19. http://dx.doi.org/10.52167/1609-1817-2024-132-3-110-119.

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Consider the rotor of an electrostatic gyroscope (ESG) for contactless operation. The rotors of the ESG are made in the shape of a ball and placed in an electric field. The gyroscope operates contactless between the rotor and the mutual oscillation force of the electrodes. Air is sucked out of the chamber in which the rotor is located. Due to the lack of air resistance and the lack of friction force, the rotor can rotate for a long time. But the rotor, located inside the vacuum, also slows down. The reason for this is the roughness and residual deposits of the rotor surface. This is the notori
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Mathew, Bilji C., Prasun Banerjee, Muhammad Fawaz, Samprit Roy, Aritra Laha, and Manasa Bhatt. "A Review on Vibration Analysis of Helicopter Rotor Blade." International Journal for Research in Applied Science and Engineering Technology 10, no. 2 (2022): 1363–69. http://dx.doi.org/10.22214/ijraset.2022.40533.

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Abstract: Vibration has always been a major disturbance for helicopter. Vibrations, thus, a threat to components of helicopter. The vibration created by a helicopter draws a great contribution to the reduction in life of the components. Reducing the vibration that creates from helicopter rotor blades, tail rotors is a one step closer to this crisis. Helicopter Vibration control is a topic of research into designing helicopter rotor blade which can be operated more efficiently. The major source of the vibration come from the rotor blade rotation. By trying to upgrade new design in the helicopte
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(Kevin) Li, Sicheng, and Seongkyu Lee. "Prediction of Urban Air Mobility Multirotor VTOL Broadband Noise Using UCD-QuietFly." Journal of the American Helicopter Society 66, no. 3 (2021): 1–13. http://dx.doi.org/10.4050/jahs.66.032004.

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This paper investigates broadband noise of multirotor urban air mobility (UAM) vertical take-off and landing (VTOL) vehicles. Based on an earlier single-rotor trailing-edge noise prediction method, a multirotor broadband noise prediction program is developed, where the multirotor coordinate transformation is included, and the amplitude modulation capability is introduced. Thereafter, the program is used to predict broadband noise from three UAM VTOL conceptual designs and a vertiport conceptual design. It is found that UAM VTOL vehicles' broadband noise is important in the high-frequency range
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Lei, Yao, and Rongzhao Lin. "Effect of wind disturbance on the aerodynamic performance of coaxial rotors during hovering." Measurement and Control 52, no. 5-6 (2019): 665–74. http://dx.doi.org/10.1177/0020294019834961.

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The ability to resist the effect of wind disturbance is vital for micro air vehicles. As the most compact rotor configuration for micro air vehicles, coaxial rotors will be the preferred choice for this type of devices. In this paper, the aerodynamic performance of the coaxial rotors considering the wind gust is presented with both experiments and simulations. First, effect of wind disturbances on the micro air vehicles flight was introduced. Then, low-speed wind tunnel tests were performed on a coaxial rotor with a spacing 0.39 R to obtain the performance in both horizontal and vertical wind
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Dissertations / Theses on the topic "Air Rotor"

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Garratt, John Edward. "Mathematical modelling of air-rotor-stator interactions in high-speed air-riding bearing and seal technology /." Thesis, University of Nottingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580292.

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Air-riding bearing and seal technology comprises rotor and stator elements separated by a thin air-film and experiencing relative rotational motion. The Navier- Stokes equations for compressible flow lead to a modified Reynolds equation incorporating additional high-speed rotation effects. The dynamics of the system are investigated when the axial position of the stator is prescribed by a finite amplitude periodic forcing. Two different physical configurations of air-riding technology are considered in this thesis; a squeeze-film thrust bearing and a pressurised air-riding face seal. Details a
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Fitchett, Brandon K. "Development and investigation of a flapping rotor for micro air vehicles." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7224.

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Thesis (M.S.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Bellia, J. M. "Aerodynamic measurements on a small HAWT rotor in axial and yawed flow." Thesis, Cranfield University, 1990. http://hdl.handle.net/1826/4290.

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Current wind turbine performance codes are not yet able to predict the rotor aerodynamic behaviour with sufficient certainty. This has led to both the over-design of blades and to operational restrictions in certain wind conditions. Essentially the problem is one of aerodynamic stall. Steady 3-dimensional stall can occur near the blade root in high wind conditions and may produce more power than predicted. Dynamic stall can also be expected due to the effects of yawed operation, turbulence, tower shadow and the earth's boundary layer. The main aim of this work is to provide a coherent set of m
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Forshaw, Jason Leigh. "Transitioning flight guidance and control for a twin rotor tailsitter unmanned air vehicle." Thesis, University of Surrey, 2013. http://epubs.surrey.ac.uk/837960/.

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The future of aircraft lies in highly intelligent vehicles which are able to adapt themselves to different missions and take-off and land anywhere. Tailsitters, aircraft capable of controlled transitions between horizontal flight (like a fixed-wing aircraft) and vertical flight (like a rotary-wing aircraft), are one such form of vehicle. The focus of this research stems from a collaboration between the Surrey Space Centre and QinetiQ involving a new class of VTOL tailsitter - the QinetiQ Eye-On™ UAV - which offers uniqueness from all other known tailsitters in its use of twin helicopter rotors
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Macdonald, John Charles. "Efficient Estimation for Small Multi-Rotor Air Vehicles Operating in Unknown, Indoor Environments." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3496.

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In this dissertation we present advances in developing an autonomous air vehicle capable of navigating through unknown, indoor environments. The problem imposes stringent limits on the computational power available onboard the vehicle, but the environment necessitates using 3D sensors such as stereo or RGB-D cameras whose data requires significant processing. We address the problem by proposing and developing key elements of a relative navigation scheme that moves as many processing tasks as possible out of the time-critical functions needed to maintain flight. We present in Chapter 2 analysis
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Jarvis, Ross Geoffrey. "Air Rotor Interproximal Reduction The Development Of A Bur For Use In Posterior Teeth." Thesis, Faculty of Dentistry, 1988. http://hdl.handle.net/2123/4241.

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Van, der Spuy Sybrand Johannes. "The design of a low-noise rotor-only axial flow fan series." Thesis, Stellenbosch : University of Stellenbosch, 1997. http://hdl.handle.net/10019.1/20977.

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ENGLISH ABSTRACT: A design routine was derived for designing a series of rotor-only axial flow fans. The routine was applied by designing two different series of axial flow fans. The first design was for a general application rotor-only axial flow fan. This fan series was designed, built and tested in co-operation with Howden Air Industries for both research and commercial purposes. The second design was for a low-noise fan series, which was designed, built and tested by the University of Stellenbosch for research purposes only. The design theory used the principle of blade cropping, me
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Bohorquez, Felipe. "Rotor hover performance and system design of an efficient coaxial rotary wing micro air vehicle." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6704.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Behr, Thomas. "Control of rotor tip leakage and secondary flow by casing air injection in unshrouded axial turbines /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17283.

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Gagnon, Robert. "Sub-Miniature Pressure Sensor Installation for UH-60A Main Rotor Blade Air Loads Flight Test Program." International Foundation for Telemetering, 1989. http://hdl.handle.net/10150/614625.

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International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California<br>A UH-60A (Black Hawk) full-scale main rotor blade has been instrumented with 242 subminiature pressure transducers placed beneath the blade skin. The instrumented blade will be flight tested on a UH-60A helicopter at the AMES Research Center. The pressure transducers are of the sub-miniature silicon full-bridge type with a small diameter tube (.028 inches OD) leading into the pressure sensing cavity. Fifty of the transducers have built-in tempera
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Books on the topic "Air Rotor"

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Rasmussen, Flemming. Dynamics of a two-bladed teetering rotor. Risø National Laboratory, 1992.

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Ken, Duisenberg, and Ames Research Center, eds. Simulation of rotor blade element turbulence. National Aeronautics and Space Administration, Ames Research Center, 1995.

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United States. National Aeronautics and Space Administration., ed. Evaluation of thermal barrier and PS-200 self-lubricating coatings in an air-cooled rotary engine. National Aeronautics and Space Administration, 1995.

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L, Celestina Mark, and United States. National Aeronautics and Space Administration., eds. Experimental and computational investigation of the tip clearance flow in a transonic axial compressor rotor. National Aeronautics and Space Administration, 1995.

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United States. Congress. Office of Technology Assessment., ed. New ways: Tiltrotor aircraft and magnetically levitated vehicles. Congress of the U.S., Office of Technology Assessment, 1991.

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P, van Dam Cornelis, Duque Earl P. N, and United States. National Aeronautics and Space Administration., eds. Numerical simulation of helicopter engine plume in forward flight: Final report cooperative agreement #NCC2-5061. National Aeronautics and Space Administration, 1994.

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P, Van Dam C., Duque Earl P. N, and United States. National Aeronautics and Space Administration., eds. Numerical simulation of helicopter engine plume in forward flight: Final report cooperative agreement #NCC2-5061. National Aeronautics and Space Administration, 1994.

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Prof. Eng. Ibrahim Abdou Elhawary. Mechanics of Rotor Spinning Machines. Taylor & Francis Group, 2017.

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Prof. Eng. Ibrahim Abdou Elhawary. Mechanics of Rotor Spinning Machines. Taylor & Francis Group, 2017.

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Prof. Eng. Ibrahim Abdou Elhawary. Mechanics of Rotor Spinning Machines. Taylor & Francis Group, 2017.

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Book chapters on the topic "Air Rotor"

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Eltaweel, Mahmoud, Christos Kalyvas, Yong Chen, and Mohammad Reza Herfatmanesh. "Development of a CFD Model for the Estimation of Windage Losses Inside the Narrow Air Gap of an Enclosed High-Speed Flywheel." In Springer Proceedings in Energy. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-30960-1_16.

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AbstractConcerns over global warming and the need to reduce carbon emissions have prompted the development of novel energy recovery systems. During urban driving, a significant amount of energy is lost due to continuous braking, which can be recovered and stored. The flywheel energy storage system can efficiently recover and store the vehicle's kinetic energy during deceleration. In this study, a Computational Fluid Dynamics (CFD) model was developed to assess the impact of air gap size, and rotor cavity pressure environment on the aerodynamic performance of an enclosed non-ventilated flywheel
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Czolczynski, Krzysztof. "Stability of the Rotor — Bearing — Air Rings System (Applications)." In Mechanical Engineering Series. Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1518-9_8.

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Ravikovich, Y. A., Y. I. Ermilov, A. O. Pugachev, A. A. Matushkin, and D. P. Kholobtsev. "Prediction of Stiffness Coefficients for Foil Air Bearings to Perform Rotordynamic Analysis of Turbomachinery." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_104.

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Cardoso, Juliana Fernandes, Marylin Fassenet, Christian Chillet, Laurent Gerbaud, and Lamya Abdeljalil Belhaj. "Air-Gap Reluctance Function for MEC Dynamic Models of Smooth Rotor Machines." In Lecture Notes in Electrical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56970-9_24.

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Kim, Wonhyun, Taeyoung Kim, Dohyeong Lim, Sangpyo Woo, and Wonho Joo. "Rotordynamic Analysis for Integrally Geared Air Compressor Using Measured Dynamic Coefficients of Tilting Pad Journal Bearings." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_114.

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Baum, Christoph, Hartmut Hetzler, and Wolfgang Seemann. "On the Dynamics of a Rigid Rotor with Static Unbalance Symmetrically Mounted in Compliant Air Bearings." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_96.

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He, Yu-Ling, Fa-Lin Wang, Meng-Qiang Ke, and Gui-Ji Tang. "Rotor Vibration Difference Among the Single and the Combined Faults Composed by Static Air-Gap Eccentricity and Rotor Interturn Short Circuit." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_52.

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Shahangian, Navid, Leila Sharifian, Rüdiger Beykirch, Albert Jeckel, Silja Klier, and Lothar Grupe. "Simulation of Oil Flow Behavior in the Air Gap between Rotor and Stator." In Proceedings. Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-42940-9_6.

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Franc, Jiří, and Roman Pechanek. "Analysis of Rotor Ventilation System of Air Cooled Synchronous Machine Through Computational Fluid Dynamics." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65960-2_32.

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Sang, Shang, Wei Ni, Ming Cheng, and Zhixue He. "Optimization of the Hollow Shaft in an Air Compressor Rotor for Hydrogen Fuel Cell." In Springer Proceedings in Physics. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8581-4_31.

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Conference papers on the topic "Air Rotor"

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van der Wall, Berend. "Propeller-Rotor Interaction: a Problem of Helicopter Air-to-Air Refueling." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-149.

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During helicopter air-to-air refueling the rotor of the helicopter might enter the slipstream of the tanker aircraft's propeller. Based on blade element momentum theory, the impact of the accelerated air within the propeller slipstream on rotor blade aerodynamics (thrust, rolling and pitching moments) can be solved analytically. Also, DLR's comprehensive rotorcraft code has been used with the Pitt-Peters induced inflow plus rotor-rotor interference model. Additionally, DLR's free-wake code was used for both the propeller and the helicopter main rotor, including mutual wake-wake-interactions. T
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Miller, Mark, Geoffrey Karli, Zarif Rahman, Constantinos Kandias, Eric Greenwood, and Jose Palacios. "Characterizing Rotor Performance Changes with Scale in Compressed Air." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1082.

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Full-scale rotorcraft aerodynamics are challenging to study in the field due to the lack of control over ambient conditions as well as the complexity and cost of operating a full-scale vehicle. Small-scale testing can provide significant insight into rotorcraft operation and aerodynamics but is limited by the scale factor between model and prototype. An alternative method for testing rotor performance is presented that utilizes compressed air as the working fluid. By compressing the air, flight-scale aerodynamic conditions can be achieved in hover (Reynolds number, Mach number, and advance rat
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Estenlund, Samuel, and Avo Reinap. "Hollow Direct Air Cooled Rotor Windings: Experimental Verification." In 2024 International Conference on Electrical Machines (ICEM). IEEE, 2024. http://dx.doi.org/10.1109/icem60801.2024.10700542.

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Axten, Christopher, Yisehak Keflemariam, and James Coder. "Assessment of a Slotted, Natural-Laminar-Flow Airfoil for Advanced Air Mobility Applications." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-46.

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The advanced air mobility (AAM) sector is using novel aircraft configurations and distributed electric propulsion to revolutionize aviation. These concepts require rotors that are efficient in vertical and forward flight. A concept that shows potential for this application is the slotted, natural-laminar-flow (SNLF) airfoil due to its high lift and low drag characteristics. This work explores the impacts of using an SNLF airfoil on an AAM rotor. Comparisons are made with blade element momentum theory (BEMT) method and computational fluid dynamics (CFD) to study the impact on the performance of
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Prothin, Sebastien, François Defay, Luc Lambert, and Guillaume Raynaud. "A Vectoring Thrust Coaxial Rotor for Micro Air Vehicle: Modeling and Control." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11573.

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The growing interest of rotary wing UAVs, for military and civilian applications, has encouraged designers to consider miniaturized configurations, more efficient in terms of endurance, payload capability and maneuverability. The purpose of this paper is to study a new configuration of coaxial rotor as applied to a micro aerial vehicle (MAV) with the intention to guarantee the vehicle maneuverability while removing unnecessary control surfaces which would increase wind gust sensitivity. Coaxial rotor configurations maximize the available rotor disk surface and allow for torque cancelation. Til
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Prothin, Sebastien, and Nicolas Doué. "Design and Analysis of a Thrust-Vectoring Coaxial-Rotor Micro Air Vehicle." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10292.

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The growing interest of rotary wing UAVs, for military and civilian applications, has encouraged designers to consider miniaturized configurations, more efficient in terms of endurance, payload capability and maneuverability. The purpose of this paper is to study a new configuration of coaxial rotor as applied to a micro aerial vehicle (MAV) with the intention to guarantee the vehicle maneuverability while removing unnecessary control surfaces which would increase wind gust sensitivity. Coaxial rotor configurations maximize the available rotor disk surface and allow for torque cancelation. Til
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Winslow, Justin, Zohaib Hasnain, Moble Benedict, and Inderjit Chopra. "Performance and Flowfield Measurements of a Micro-Air-Vehicle Scale Helicopter Rotor." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9663.

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This paper describes the systematic performance measurements and flowfield studies (PIV) conducted towards understanding and optimizing the hover performance of a MAV-scale helicopter rotor operating at Reynolds numbers of 30,000 or less. The rotor parameters that were varied include blade airfoil profile, blade chord, number of blades, blade twist, planform taper and winglets at blade tip. Blade airfoil section had a significant impact on the hover efficiency and among the large number of airfoil sections tested, the ones with the lower thickness to chord ratios and moderate camber (4.5% to 6
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Keller, Jeffrey, Abhinav Sharma, Jean-Pierre Theron, and Robert M. "UrbanAdvanced Air Mobility Interactional Aerodynamic Modeling for Flight Mechanics Applications." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1226.

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Flight mechanics modeling and real-time simulation of rotorcraft have many challenges including the aerodynamics and dynamics of the rotor system, rotor inflow, and wake-airframe interactions. Furthermore, interactional aerodynamic effects are difficult to characterize, in particular during early configuration down-selection. Rotorcraft configurations under consideration for advanced air mobility applications are trending toward designs with coaxial rotor systems and multiple distributed propellers / rotors in close-proximity with one another and the airframe. This proximity leads to strong co
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Atci, Kagan, Peter Weiand, and Hilal Inac. "An Initial Flight Performance Assessment of New Urban Air Mobility Concept Vehicles for Medical Rendezvous Operations." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-313.

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A novel multirotor concept is proposed for airlifting the emergency medical personnel without the use of a rescue helicopter (designed for patient transport) during the first line emergency services. Based on this concept, two configurations are designed and introduced, comprising a common quadrotor system with single and dual pusher propellers, respectively. An initial flight performance assessment is conducted for the introduced configurations by means of trim calculations in two distinctive flight modes across the entire designated flight speed range, initially without rotor-rotor interacti
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Sorensen, Peter, and Daniel R. Cuppoletti. "Rotor-Rotor Interaction Noise of Counter-Rotating vs Co-Rotating Rotors for Air Mobility Applications." In AIAA SCITECH 2022 Forum. American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-1296.

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Reports on the topic "Air Rotor"

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Zheng, Wanzheng, and Jason Merret. Aerodynamic Survey of Novel eVTOL Configuration Using SU2. Illinois Center for Transportation, 2022. http://dx.doi.org/10.36501/0197-9191/22-014.

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This report summarizes computational fluid dynamics (CFD) results of electric vertical takeoff and landing (eVTOL) geometries using the SU2 Reynolds-averaged Navier-Stokes (RANS) solver. Geometries were generated based on the Smart Transportation Infrastructure Initiative (STII) Rappor 15th iteration with various rotor-installment solutions. It was found that although open rotors installed on an underwing pylon were superior to shrouded rotors installed in a canoe, the canoe configuration would provide more potential for improvement, and using a canoe door to cover the first rotor opening woul
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Schofield, Ian S., Paul L. Brown, Mark J. Logsdon, and Matthew P. Wickham. Waste Rock Dump Characterization Studies at the Bingham Canyon Mine. Utah Geological Survey, 2024. http://dx.doi.org/10.34191/mp-179.

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The Bingham Canyon Mine, located near Salt Lake City, Utah, is surrounded by more than 6 billion tons of waste rock developed over the open cut mining history from 1903 to present; the surface area of the waste rock is approximately 5000 acres. Waste rock dumps have a thickness of more than 1 200 feet from crest to toe. From 1930 to 2000, selected portions of the waste rock dumps were commercially leached using a ferric-sulfate-based lixiviant to extract copper, whereas other portions have only received meteoric leaching. From 2011 to present, Rio Tinto Kennecott has studied the evolution and
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