Log in

Relevant bibliographies by topics / Blade-root

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Blade-root'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Blade-root.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Blade-root"

1

Sal, Firat. "Analysis of combined passively and actively morphing blade root chord length and blade taper for helicopter control." Aircraft Engineering and Aerospace Technology 92, no. 2 (2019): 172–79. http://dx.doi.org/10.1108/aeat-04-2019-0077.

Full text

Abstract:

Purpose The purpose of this study is to examine the effect of passive and active morphing of blade root chord length and blade taper on the control effort of the flight control system (FCS) of a helicopter. Design/methodology/approach Physics-based helicopter models, which are functions of passive and active morphing, are created and applied in helicopter FCS design to determine the control effort. Findings Helicopters, having both passively and actively morphing blade root chord length and blade taper, experience less control effort than the ones having either only passively morphing blade ro

APA, Harvard, Vancouver, ISO, and other styles

2

Sal, Firat. "Effects of the actively morphing root chord and taper on helicopter energy." Aircraft Engineering and Aerospace Technology 92, no. 2 (2019): 264–70. http://dx.doi.org/10.1108/aeat-08-2019-0165.

Full text

Abstract:

Purpose The purpose of this paper presents the effects of actively morphing root chord and taper on the energy of the flight control system (i.e. FCS). Design/methodology/approach Via regarding previously mentioned purposes, sophisticated and realistic helicopter models are benefitted to examine the energy of the FCS. Findings Helicopters having actively morphing blade root chord length and blade taper consume less control energy than the ones having one of or any of passively morphing blade root chord length and blade taper. Practical implications Actively morphing blade root chord length and

APA, Harvard, Vancouver, ISO, and other styles

3

Amer, Kenneth B. "Technical Notes: Comment on the “Minimum Weight Design of Helicopter Rotor Blades with Frequency Constraints,” Journal of the American Helicopter Society, October, 1989." Journal of the American Helicopter Society 35, no. 2 (1990): 69. http://dx.doi.org/10.4050/jahs.35.2.69.

Full text

Abstract:

It appears that most of the weight saving from the reference blade to the minimum‐weight blade is in the region of the blade root. Undoubtedly, the reference blade requires this weight increase to accommodate the usual bending fatigue loads at the root. The authors do not address the question of how their minimum‐weight blade would handle blade‐root fatigue loads.

APA, Harvard, Vancouver, ISO, and other styles

4

Sun, Yuanrong, Yihang Qu, Congli Hu, Peiyu Qi, Huawei Liu, and Jianbo Li. "Effects of Fibre-Reinforced Plastic Wedge-Stick Slope on the Performance of Wind-Turbine Blade Root Connections." Coatings 14, no. 1 (2024): 129. http://dx.doi.org/10.3390/coatings14010129.

Full text

Abstract:

Bushing-insert connections have emerged as efficient blade root connection designs. Bushing-insert connections with fibre-reinforced plastic (FRP) wedge-sticks enhance the strength and stability of the blade root, prevent stress concentration at the blade root, and improve the service life and reliability of the blade. However, studies on the failure mechanisms of the FRP wedge-sticks in bushing-insert connections are scarce. Hence, in this study, the influence of the FRP wedge-stick on the structural performance of the blade root was analysed by changing the slope of the FRP wedge-stick’s inc

APA, Harvard, Vancouver, ISO, and other styles

5

Zhou, Peng Zhan, and Fang Sheng Tan. "Stress Characteristics Analysis on a Composite Wind Turbine Blade." Advanced Materials Research 602-604 (December 2012): 111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.111.

Full text

Abstract:

The stress characteristics on a composite wind turbine blade are analyzed by using a finite element method. The whole stress level of the spar cap and the blade root is higher than that of the shear web and the airfoil plate, so the spar cap and the blade root are the main force-supporting parts. If the stress concentration point on the interface corner between the blade root and the shear web is neglected, the stress of the spar cap is higher than that of the blade root, and its maximum stress and mean stress are 211 MPa and 180 MPa respectively. The maximum stress of the blade is only 34.8%

APA, Harvard, Vancouver, ISO, and other styles

6

Hee, Lim Meng, M. Salman Leong, and K. H. Hui. "Blade Faults Classification and Detection Methods: Review." Advanced Materials Research 845 (December 2013): 123–27. http://dx.doi.org/10.4028/www.scientific.net/amr.845.123.

Full text

Abstract:

Blade faults are ranked among the most frequent causes for gas turbine failures. This paper provides a review on the types of blade faults as well as its pertinent detection methods. In this paper, blade faults are categorized into five major groups according to their nature and characteristics namely, blade rubbing, blade fatigue failures, blade deformation, blade fouling, and blade root related problems such as cracked root and loose blade. This paper aims to provide an overview on the characteristics of each type of blade fault as well as its best detection methods available to date.

APA, Harvard, Vancouver, ISO, and other styles

7

Wiryolukito, Slameto. "Design Flaw Enhanced by Improper Workmanship to Cause Fatigue Failure on Rotor Blade of Compressor Gas Turbine." Applied Mechanics and Materials 660 (October 2014): 593–97. http://dx.doi.org/10.4028/www.scientific.net/amm.660.593.

Full text

Abstract:

Ten stages of Compressor Engine S/N 123 of X-Gas Turbine failed in service prior the schedule for overhaul at 40,000 hour. At the failure event the running hour was 29,600. The maintenance was normally done every 8000 hours including filter and gasket replacement, instrument re-calibration, and bore scope examination. Upon dismantling, it was found one blade at rotor stage #3 failed with facture surface strongly indicated a fatigue failure, defective on stator and rotor blades at downstream, no defective blades at upstream. Detail examination confirm Root Cause of failure on Compressor Blade o

APA, Harvard, Vancouver, ISO, and other styles

8

Martynenko, Volodymyr. "Comparative analysis of the dynamic characteristics of all-metal, composite and composite blades with the same profile, taking into account the influence of the connection of elements and aerodynamic loads." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, no. 2 (December 21, 2023): 16–27. http://dx.doi.org/10.20998/2078-9130.2023.2.292982.

Full text

Abstract:

The paper presents a comparative analysis of the dynamic properties of the blades of one rotary machine which have the same airfoil shape, but are made of three different materials, namely aluminum alloy, a complex material combining aluminum alloy and steel, and a composite material which is unidirectional fiberglass. In the case of an all-metal blade, its airfoil and root are made of aluminum alloy. In the case of complex blade airfoil material, the root is made of steel which is also a component of the airfoil material. In the case of a composite blade, the root is steel and is connected at

APA, Harvard, Vancouver, ISO, and other styles

9

Dong, Zheng Yan, and Han Long Zhang. "Study on Finite Element Model of Bolt Strength in Blade Root." Applied Mechanics and Materials 427-429 (September 2013): 221–24. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.221.

Full text

Abstract:

This study has established a 1/184 model of blade root by using finite element software (ANSYS), and analyzed the stress pipeline and errors of this blade root model. By transforming the loads in blade root and imposing axial step load, especially by analyzing models boundary conditions and the structure of contact surface, the axial stress, bending stress and the other parameters have been acquired.

APA, Harvard, Vancouver, ISO, and other styles

10

Oktay, Tugrul, and Firat Sal. "Effect of the Simultaneous Variation in Blade Root Chord Length and Blade Taper on Helicopter Flight Control Effort." International Journal of Aerospace Engineering 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/6325269.

Full text

Abstract:

In this study, the effect of simultaneous variation in blade root chord length and blade taper on the control effort of helicopter flight control system (i.e., FCS) of a helicopter is investigated. Therefore, helicopter models (i.e., complex, control-oriented, and physics-based models) including the main physics and essential dynamics are used. The effect of simultaneous variation in the blade root chord length and blade taper (i.e., in both chordwise and lengthwise directions dependently) on the control effort of an FCS of a helicopter and also on the closed-loop responses is studied. Compari

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Blade-root"

1

SAEED, ZEESHAN. "Identification of Blade-root Joint Dynamics in Turbine Disks." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2928612.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Khattab, M. I. A. "Optimum rotor blade configurations for minimum oscillatory root bending moment." Thesis, City University London, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353959.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

ALINEJAD, FARHAD. "Development of advanced criteria for blade root design and optimization." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2711560.

Full text

Abstract:

In gas and steam turbine engines, blade root attachments are considered as critical components which require special attention for design. The traditional method of root design required high experienced engineers yet the strength of the material was not fully exploited in most cases. In the current thesis, different methodologies for automatic design and optimization of the blade root has been evaluated. Moreover, some methods for reducing the computational time have been proposed. First, a simplified analytical model of the fir-tree was developed in order to evaluate mean stress in differe

APA, Harvard, Vancouver, ISO, and other styles

4

DASTANI, HADI. "Experimental and numerical investigation of Contact stiffness in blade root joints." Doctoral thesis, Politecnico di Torino, 2022. https://hdl.handle.net/11583/2972878.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

LASSALLE, MARCO. "Self-excited vibrations controlled by damping at blade root joints of turbine disks." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2712971.

Full text

Abstract:

The purpose of this thesis is the development of a methodology for the calculation of the non-linear aero-elastic behavior of a bladed disk to be used in an industrial process. The non-linear aero-elastic phenomena of a bladed disk for aeronautical applications are studied in the presence of friction contacts using a one-way coupled method. The calculation is performed using a method based on the Harmonic Balance Method (HBM) and the balance between the energy introduced by the unsteady aerodynamics on the blade airfoil and the dissipative energy. The HBM method is preferred with respect to th

APA, Harvard, Vancouver, ISO, and other styles

6

Lutschinger, Dirk. "Turbulence consideration in wind turbine design and its effect on main shaft motion and blade root strain." Thesis, Curtin University, 2016. http://hdl.handle.net/20.500.11937/911.

Full text

Abstract:

This PhD research investigated the influence of turbulence effects on the vibration behaviour of wind turbines. A small laboratory scale wind turbine test facility was developed with special purpose instrumentation and sensors. Experimental investigations of the vibration behaviour of the turbine demonstrated the complexity of the displacements of the main rotor shaft and the strain at the roots of the rotor blade. This research will assist in the ongoing development of improved failure detection mechanisms.

APA, Harvard, Vancouver, ISO, and other styles

7

Hettasch, Georg. "Optimization of fir-tree-type turbine blade roots using photoelasticity." Thesis, Stellenbosch : University of Stellenbosch, 1992. http://hdl.handle.net/10019.1/993.

Full text

Abstract:

Thesis (MEng.)-- University of Stellenbosch, 1992. 140 leaves on single pages, preliminary pages i-xi and numbered pages 1-113. Includes bibliography. Digitized at 600 dpi grayscale to pdf format (OCR),using an Bizhub 250 Konica Minolta Scanner and at 300 dpi grayscale to pdf format (OCR), using a Hp Scanjet 8250 Scanner.<br>Thesis (MEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 1992<br>ENGLISH ABSTRACT: The large variety of turbo-machinery blade root geometries in use in industry prompted the question if a optimum geometry could be found. An optimum blade root w

APA, Harvard, Vancouver, ISO, and other styles

8

Sanchez, Pena Adriano. "“Experimental Assessment of the Effectiveness of Active Flaps to Reduce the Blade Root Bending Moment of Wind Turbine Blades”." Thesis, KTH, Mekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194502.

Full text

Abstract:

This thesis intends to asses the application of local flow control to wind turbines blades, in order to demonstrate that the normal root benging moment on the blades can be reduced, with the aim of increasing wind turbines life span, reducing regular maintenance and further to make a contribution to current research on wind turbines. It develops the subject by first assessing the flow characteristics of the Großer Windkannal (GroWiKa) in the Hermann-Föttinger Institute (HFI) at the Technical University of Berlin and continues with establishing the effectiveness of local flow control on the Rea

APA, Harvard, Vancouver, ISO, and other styles

9

Sousa, Isaac Diego Pereira de. "Design and testing Of blades for small wind turbines with different geometrical correction in root and tip of blade." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12320.

Full text

Abstract:

CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>The work aims to build , using the BEM (Blade Element Moment) theory , and test three wind rotors , each one consisting of three blades, which were constructed and used for assembling three SWT (Small Wind Turbine) with TSR (Tip Speed Ratio) equal to seven. The three rotors with blades of 2 meters length, distinguished themselves in their geometries as follows: 1) blades without any correction, 2) blades with only tip correction, 3) blades with only root correction. The NREL S809 airfoil developed by the U.S. National Renewable Ener

APA, Harvard, Vancouver, ISO, and other styles

10

Meijer, Gerrit Johannes. "New methods for in situ measurement of mechanical root-reinforcement on slopes." Thesis, University of Dundee, 2016. https://discovery.dundee.ac.uk/en/studentTheses/c8857b54-36cb-4e68-83b1-cf1e78df30d9.

Full text

Abstract:

Vegetation can increase the resistance of slopes against landsliding. The mechanical contribution of roots to the shear strength of the soil is however difficult to measure in situ. Existing methodologies are time-consuming and therefore not suitable to quantify spatial variability on the slope. Furthermore, some existing methods, for example large in situ shear box testing, can be difficult to apply on remote sites with difficult access, e.g. steep slopes. Therefore in this thesis novel, simple and portable methods to quantify mechanical root-reinforcement in the field were developed. The ‘bl

APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Blade-root"

1

S, Reddy E., and United States. National Aeronautics and Space Administration., eds. Root damage analysis of aircraft engine blade subject to ice impact. National Aeronautics and Space Administration, 1992.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Root damage analysis of aircraft engine blade subject to ice impact. National Aeronautics and Space Administration, 1992.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Blade-root"

1

Thomre, Muktai, and K. Ramesh. "Analysis of Crack Growth in Compressor Blade Root Subjected to Fatigue." In Challenges in Mechanics of Time Dependent Materials, Fracture, Fatigue, Failure and Damage Evolution, Volume 2. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29986-6_17.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Allara, Marco, Stefano Zucca, and Muzio M. Gola. "Effect of Crowning of Dovetail Joints on Turbine Blade Root Damping." In Damage Assessment of Structures VII. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-444-8.317.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Bhamu, Rajesh K., Akash Shukla, S. P. Harsha, and Satish C. Sharma. "Vibration Response of Fir Tree Root Blades with the Variation in Fixing Condition on Blade Root Interfaces." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8025-3_83.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Ramakrishnan, C. V., and M. A. W. Usmani. "Finite Element Modelling of Dynamic Contact Application for Blade Root Damping Estimation." In Computational Mechanics ’86. Springer Japan, 1986. http://dx.doi.org/10.1007/978-4-431-68042-0_51.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Thomre, Muktai, and K. Ramesh. "Evaluation of Fracture Parameters of Cracks in Compressor Blade Root Using Digital Photoelasticity." In Reliability, Safety and Hazard Assessment for Risk-Based Technologies. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9008-1_46.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Sirigu, M., E. Faraggiana, A. Ghigo, E. Petracca, G. Mattiazzo, and G. Bracco. "Development of a simplified blade root fatigue analysis for floating offshore wind turbines." In Trends in Renewable Energies Offshore. CRC Press, 2022. http://dx.doi.org/10.1201/9781003360773-103.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Fazeli Nahrekhalaji, A. R., M. Sohrabi, and S. M. Izadi. "Investigation of Influences of Wheel Speed on Root Geometrical Dimension of Gas Turbine Blade." In Proceedings of the 36th International MATADOR Conference. Springer London, 2010. http://dx.doi.org/10.1007/978-1-84996-432-6_23.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Doliński, Łukasz, Marek Krawczuk, and Arkadiusz Żak. "Damage Detection in the Wind Turbine Blade Using Root Mean Square and Experimental Modal Parameters." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8331-1_57.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Schimke, D., Uwe T. P. Arnold, W. Geißler, R. Kube, and W. R. Splettstösser. "Active Rotor Control by Servo-Flap and Blade Root Control Recent Results from Flight Test and Wind Tunnel." In Notes on Numerical Fluid Mechanics (NNFM). Vieweg+Teubner Verlag, 1999. http://dx.doi.org/10.1007/978-3-663-10901-3_50.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Zheng, T., and N. Z. Chen. "Impact of preload loss on fatigue strength of blade root bolts of a Floating Offshore Wind Turbine (FOWT)." In Advances in the Analysis and Design of Marine Structures. CRC Press, 2023. http://dx.doi.org/10.1201/9781003399759-59.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Blade-root"

1

Gowda, Appaji, H. Yeshovanth, and O. Germiya. "Damage Tolerance Studies At The Blade Root Attachment Of Aero Engines." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10256.

Full text

Abstract:

The Stress and failure analysis of turbine components plays a vital role in the performance evaluation of an aeroengine. The turbine consists of a disc over which blades are attached mainly either by dovetail or fir-tree arrangements. Fretting damages at the contact interfaces are studied commonly during post failure through fractographic studies. Prediction of contact tractions and stresses during fretting loading cycle is a challenging task yet to be addresses, through in-situ micro-tomography, Synchrotron X-ray micro-tomography and acoustic emission techniques have been recently implemented

APA, Harvard, Vancouver, ISO, and other styles

2

Biedron, Robert, and Elizabeth Lee-Rausch. "Blade Displacement Predictions for the Full-Scale UH-60A Airloads Rotor." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9446.

Full text

Abstract:

An unsteady Reynolds-Averaged Navier-Stokes solver for unstructured grids is loosely coupled to a rotorcraft comprehensive code and used to simulate two different test conditions from a wind-tunnel test of a full-scale UH-60A rotor. Performance data and sectional airloads from the simulation are compared with corresponding tunnel data to assess the level of fidelity of the aerodynamic aspects of the simulation. The focus then turns to a comparison of the blade displacements, both rigid (blade root) and elastic. Comparisons of computed root motions are made with data from three independent meas

APA, Harvard, Vancouver, ISO, and other styles

3

Hajek, Manfred, Stephanie Manner, and Soeren Suesse. "Blade Root Integrated Fibre Bragg Grating Sensors - A Highly Redundant Data Source For Future HUMS." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10189.

Full text

Abstract:

Fiber Bragg Gratings (FBG) show an excellent potential for accurate strain measurement in aerospace and other applications. This paper will describe an approach to derive remaining useful lifetime values for dynamically loaded components by using FBG strain sensor data from helicopter blades. A complete chain of transformations is presented together with a substantiation approach for certification. The transformation chain is based on properties of piece-wise linear mechanical systems for which observability conditions are fulfilled. For this class of problems, FBG measurement values can be us

APA, Harvard, Vancouver, ISO, and other styles

4

Krott, Matthew, Edward Smith, Jose Palacios, and Christopher Rahn. "Modeling, Development, and Testing of Fluidic Flexible Matrix Composite Blade Dampers." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12749.

Full text

Abstract:

Currently existing lead-lag dampers are complex and maintenance-intensive parts of the rotor hub, and they are ineffective solutions for stiff-inplane rotors which experience very small deformation at the blade root. This paper introduces a new class of rotor blade dampers that use Fluidic Flexible Matrix Composite (F2MC) tubes connected to fluidic circuits. Models are developed that couple the blade, F2MC tube, and fluidic circuit dynamics in order to assess the performance of the proposed solutions. In this paper, two different devices are proposed for augmenting the damping of hingeless and

APA, Harvard, Vancouver, ISO, and other styles

5

Jayasundara, Dilhara, Phillip Gomez, and Ian Randall. "Prediction and Reduction of Blade Wake Interaction Noise in High Solidity Rotors using Multi-Fidelity CFD Analysis." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-405.

Full text

Abstract:

Blade–wake interaction (BWI) is a significant source of broadband noise and is often dominant in rotors with high blade counts. Accurately capturing the resulting unsteady blade loading is computationally expensive and, therefore, drives the cost of BWI noise calculation. To address this challenge, a low-fidelity BWI noise prediction tool was developed using aerodynamic data from the blade element momentum theory (BEMT) and the lattice Boltzmann method (LBM) for a series of rotor configurations with medium to high solidity. Starting from a six-bladed baseline rotor, 13 additional configuration

APA, Harvard, Vancouver, ISO, and other styles

6

Schank, Troy, and Kynn Schulte. "A Smart Position Sensor for Articulated Rotors." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10190.

Full text

Abstract:

Modern articulated rotors utilize an elastomeric bearing on the root of each blade to allow multi-axis articulation through a single component. The bearing forms a spherical joint that makes measuring angular displacements in specific blade axes both coupled and difficult to measure. A smart sensing concept is developed to uncouple and separately measure the blade flapping, feathering, and lead-lag position. The sensor concept projects a magnetic field from the blade root to the rotor hub such that flap, lag and pitch displacements can be derived from a hub mounted pickup array. The device uti

APA, Harvard, Vancouver, ISO, and other styles

7

Lei, Yu, and Xie Wen. "Research on the measurement method of the torsion angle of the blade root of the coaxial helicopter." In 2024 8th International Conference on Electrical, Mechanical and Computer Engineering (ICEMCE). IEEE, 2024. https://doi.org/10.1109/icemce64157.2024.10862687.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Niemiec, Robert, and Farhan Gandhi. "Effect of Elastic Blade Deformation on Trim and Vibratory Loads of a Quadcopter." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12064.

Full text

Abstract:

This study examines the effect of rotor blade elastic deformations on a quadcopter in forward flight conditions. The blade equations are discretized using the Galerkin method and the blade periodic response is calculated using the harmonic balance method. Simulations are conducted on a 2 kg quadcopter with 12 inch diameter two-bladed rotors. The blade root vertical shear, flap bending moment and drag shear showed a strong 1/rev variation due to the azimuthal variation in aerodynamic loads. Elastic blade deformations did not affect the aerodynamic loads but the addition of in-phase 1/rev inerti

APA, Harvard, Vancouver, ISO, and other styles

9

Runco, Carl, Brett Himmelberg, and Moble Benedict. "Performance and Flowfield Measurements of a Meso-Scale Cycloidal Rotor in Hover." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12298.

Full text

Abstract:

This paper details the performance and flowfield measurements on a meso-scale cycloidal rotor. Owing to the small size (rotor radius of 1 inch), the cycloidal rotor investigated in the present study operates at ultralow Reynolds numbers (Re∼11,000) and also utilizes a blade design completely different from the previous studies. The meso-scale rotor utilizes a low aspect ratio cantilevered blade design with flat plate airfoil and elliptical blade planform, which means that 3-dimensional effects will be more prominent. A highly sensitive, miniature 3-component balance was developed to measure th

APA, Harvard, Vancouver, ISO, and other styles

10

Giovanetti, Eli, and Kenneth Hall. "Minimum Loss Load and Twist Distributions for Coaxial Helicopter Rotors in Hover." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10111.

Full text

Abstract:

We present an approach for determining the optimal (minimum power) torque-balanced coaxial hovering rotor using Blade Element Momentum Theory including swirl. We quantify the effects of the swirl component of induced velocity on performance, optimal induced wash distribution, and optimal blade twist and chord. The optimization accounts for the presence of a finite number of blades using the Prandtl tip loss factor, the effect of profile drag using experimentally or computationally determined drag polars, and the mutual interference between the two rotors using an empirically determined influen

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!