Littérature scientifique sur le sujet « Blade-root »
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Articles de revues sur le sujet "Blade-root"
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 (4 novembre 2019) : 172–79. http://dx.doi.org/10.1108/aeat-04-2019-0077.
Texte intégralSal, Firat. « Effects of the actively morphing root chord and taper on helicopter energy ». Aircraft Engineering and Aerospace Technology 92, no 2 (16 décembre 2019) : 264–70. http://dx.doi.org/10.1108/aeat-08-2019-0165.
Texte intégralAmer, 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 (1 mai 1990) : 69. http://dx.doi.org/10.4050/jahs.35.2.69.
Texte intégralZhou, Peng Zhan, et Fang Sheng Tan. « Stress Characteristics Analysis on a Composite Wind Turbine Blade ». Advanced Materials Research 602-604 (décembre 2012) : 111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.111.
Texte intégralWiryolukito, Slameto. « Design Flaw Enhanced by Improper Workmanship to Cause Fatigue Failure on Rotor Blade of Compressor Gas Turbine ». Applied Mechanics and Materials 660 (octobre 2014) : 593–97. http://dx.doi.org/10.4028/www.scientific.net/amm.660.593.
Texte intégralHee, Lim Meng, M. Salman Leong et K. H. Hui. « Blade Faults Classification and Detection Methods : Review ». Advanced Materials Research 845 (décembre 2013) : 123–27. http://dx.doi.org/10.4028/www.scientific.net/amr.845.123.
Texte intégralDong, Zheng Yan, et Han Long Zhang. « Study on Finite Element Model of Bolt Strength in Blade Root ». Applied Mechanics and Materials 427-429 (septembre 2013) : 221–24. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.221.
Texte intégralOktay, Tugrul, et 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.
Texte intégralZhang, Yi, Ming Hui Zhang et Yong Hui Xie. « Turbine Blade Straddle Root and Rim Structural Optimization Using Finite Element Contact Analysis ». Advanced Materials Research 753-755 (août 2013) : 1453–56. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.1453.
Texte intégralLi, Zhen, Bofeng Xu, Xiang Shen, Hang Xiao, Zhiqiang Hu et Xin Cai. « Performance Analysis of Ultra-Scale Downwind Wind Turbine Based on Rotor Cone Angle Control ». Energies 15, no 18 (18 septembre 2022) : 6830. http://dx.doi.org/10.3390/en15186830.
Texte intégralThèses sur le sujet "Blade-root"
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.
Texte intégralLutschinger, 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.
Texte intégralHettasch, Georg. « Optimization of fir-tree-type turbine blade roots using photoelasticity ». Thesis, Stellenbosch : University of Stellenbosch, 1992. http://hdl.handle.net/10019.1/993.
Texte intégralThesis (MEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 1992
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 was defined as a root with a practical geometry which, when loaded, returns the minimum fillet stress concentration factor. A literature survey on the subject provided guidelines but very little real data to work from. An initial optimization was carried out using a formula developed by Heywood to determine loaded projection fillet stresses. The method was found to produce unsatisfactory results, prompting a photoelastic investigation. This experimental optimization was conducted in two stages. A single tang defined load stage and a single tang in-rotor stage which modeled the practical situation. The defined load stage was undertaken in three phases. The first phase was a preliminary investigation, the second phase was a parameter optimization and the third phase was a geometric optimization based on a material utilization optimization. This material optimization approach produced good results. From these experiments a practical optimum geometry was defined. A mathematical model which predicts the fillet stress concentration factor for a given root geometry is presented. The effect of expanding the single tang optimum to a three tang root was examined.
AFRIKAANSE OPSOMMING: Die groot verskeidenheid lemwortelgeometrieë wat in turbomasjiene gebruik word het die vraag na 'n optimum geometrie laat ontstaan. Vir hierdie ondersoek is 'n optimum geometrie gedefineer as 'n praktiese geometrie wat, as dit belas word, die mimimum vloeistukspanningskonsentrasiefaktor laat ontstaan. 'n Literatuur studie het riglyne aan die navorsing gegee maar het wynig spesifieke en bruikbare data opgelewer. Die eerste optimering is met die Heywood formule, wat vloeistukspannings in belaste projeksies bepaal, aangepak. Die metode het nie bevredigende resultate opgelewer nie. 'n Fotoelastiese ondersoek het die basis vir verdere optimeering gevorm. Hierdie eksperimentele optimering is in twee stappe onderneem. 'n Enkelhaak gedefineerde lasgedeelte en 'n enkelhaak in-rotor gedeelte het die praktiese situasie gemodeleer. Die gedefineerde lasgedeelte is in drie fases opgedeel. Die eerste fase was n voorlopige ondersoek. Die tweede fase was 'n parameter optimering. 'n Geometrie optimering gebasseer op 'n materiaal benuttings minimering het die derde fase uitgemaak. Die materiaal optimerings benadering het goeie resultate opgelewer. Vanuit hierdie eksperimente is 'n optimum praktiese geometrie bepaal. 'n Wiskundige model is ontwikkel, wat die vloeistukspanningskonsentrasiefaktor vir 'n gegewe wortelgeometrie voorspel. Die resultaat van 'n geometriese uitbreiding van die enkelhaaklemwortel na 'n driehaaklemwortel op die spanningsverdeling is ondersoek.
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.
Texte intégralSousa, 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.
Texte intégralThe 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 Energy Laboratory (NREL) was used. This airfoil is characterized by having been specially developed for wind turbines. The airfoil experimental data, such as the lift and drag coefficients as a function of angle of attack, were obtained based on wind tunnel test results for Reynolds number of 3 x 105. Also, field tests were conducted to collect torque in the main shaft of the wind rotor [N ∙ m], angular velocity [rad/s] and wind speed [m/s] data, using proper instrumentation and a data collection system. The data collected in the field for each turbine, were analyzed by statistical inference. The power coefficient data were grouped by TSR ranges, and was observed that the data of the last two ranges were the only intervals that showed a normal distribution of data of the Cp . These data were subjected to a one-way ANOVA. And the results showed no significant difference between the average of the rotors SC and CP. Already the data did not exhibit a normal distribution were analyzed by Exponentially Weighted Moving Average (MMEP). It was also observed that the three rotors showed no difference between the power coefficients, of the statistical point of view. An important finding of the experiments was that the CR blades had higher average values of power coefficients for each band TSR.
O trabalho visou construir, atravÃs da Teoria do BEM (Blade Element Moment), e testar trÃs rotores eÃlicos, cada um destes constituÃdos de trÃs pÃs, as quais foram construÃdas e aplicadas na montagem de trÃs TEPP (Turbinas EÃlicas de Pequeno Porte) com TSR (Tip Speed Ratio de projeto igual a sete. Os trÃs rotores, com pÃs de 2 metros de comprimento, distinguiram-se, em suas geometrias, do seguinte modo: 1) pÃs sem correÃÃo alguma, 2) pÃs com correÃÃo somente na ponta e 3) pÃs com correÃÃo somente na raiz. O aerofÃlio aplicado foi o NREL S809, desenvolvido pelo laboratÃrio norte americano de energias renovÃveis (NREL). Este aerofÃlio à caracterizado por ter sido projetado para uso especÃfico em turbinas eÃlicas. Os dados experimentais do aerofÃlio, como os coeficientes de sustentaÃÃo e arrasto em funÃÃo do Ãngulo de ataque, foram obtidos com base nos resultados de testes em tÃnel de vento para um nÃmero de Reynolds de 3 x 105. Realizou-se, tambÃm, testes em campo, utilizando-se de uma instrumentaÃÃo necessÃria para a coleta de dados de torque no eixo principal do rotor eÃlico [N.m], velocidade angular do rotor [rad/s], e velocidade do vento, por meio de um sistema de coleta de dados. Os dados colhidos em campo, de cada turbina, foram analisados por inferÃncia estatÃstica. Os dados de Cp foram agrupados por faixas de TSR, e observou-se que os dados das duas Ãltimas faixas foram os Ãnicos intervalos que apresentaram uma distribuiÃÃo normal de probabilidade dos dados de Cp . Estes dados foram submetidos a uma ANOVA com um fator. E os resultados mostraram que nÃo hà uma diferenÃa significativa entre as mÃdias dos rotores SC e CP. Jà os dados que nÃo apresentaram uma distribuiÃÃo normal foram analisados pela MÃdia MÃvel Exponencialmente Ponderada (MMEP). Verificou-se tambÃm que os trÃs rotores nÃo apresentaram diferenÃa entre os coeficientes de potÃncia, do ponto de vista estatÃstico. Uma importante constataÃÃo dos experimentos realizados foi a de que as pÃs CR apresentaram valores mÃdios de Cp superiores para cada faixa de TSR.
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.
Texte intégralWong, Vui-Hong, et n/a. « Finite Element Analysis and Improvement of Impeller Blade Geometry ». Griffith University. School of Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030825.150853.
Texte intégralЦьонь, Олег Петрович, et O. P. Tsion. « Удосконалення конструкції дообрізувача гички цукрових буряків активного типу ». Thesis, Тернопільський національний технічний університет ім. Івана Пулюя, 2014. http://elartu.tntu.edu.ua/handle/123456789/5432.
Texte intégralУдосконалення конструктивної схеми доочисника головок коренеплодів, який забезпечує підвищення показників надійності та якості виконання технологічного процесу, можливо досягти шляхом розроблення гичкозрізуючого пристрою з активним плоским ножем. Перевагою запропонованого конструктивного рішення, порівняно з активним дисковим ножем, є підвищена експлуатаційна надійність, значно менша маса та простота виготовлення.
Дисертацію присвячено питанням підвищення ефективності та надійності технологічного процесу дообрізування залишків гички з головок коренеплодів цукрових буряків на основі обґрунтування конструктивно-технологічних параметрів механізму дообрізувача гички активного типу. Теоретично досліджено: процес взаємодії активного плоского ножа з головками коренеплодів при режимі різання з ковзанням; НДС ножа при приведенні у рух; модель руху дообрізувача гички з активним робочим органом по рядках коренеплодів цукрових буряків; коефіцієнт ковзання в системі “коренеплід – плоский ніж”. Експериментально досліджено залежність сили різання головок цукрових буряків активним плоским ножем від робочої швидкості бурякозбирального агрегату; зворотно-поступальної швидкості ножа та товщини його леза; діаметра коренеплодів. Встановлено корозійний вплив на функціональну здатність конструкційних матеріалів ножів середовища соку цукрових буряків. Застосування запропонованої конструкції дообрізувача активного типу дозволить підвищити ефективність та надійність процесу доочищення головок коренеплодів цукрових буряків від залишків гички.
The thesis is dedicated to the problem of improving the efficiency and reliability of technological topping the residual tops of sugar beet crowns taking into consideration the structural and technological parameters of an active type topper. The following aspects are theoretically researched: interaction of an active flat knife with the root beet crowns in mode of cutting with sliding; tensely deformed status of that knife when moving; model of moving the topper with active working bodies along sugar root beets rows; coefficient of sliding in the system “root – flat knife”. The dependence of sugar beet crowns cutting force by means of active flat knife on the working speed of a beet harvester, as well as on the knife reciprocating speed, knife blade thickness, root diameter, is developed experimentally. The corrosion effect of beet juice on functional capability of knife structural materials is researched. The use of active type topper design will improve the efficiency and reliability of toping the sugar beet crowns.
Chen, Li-ru, et 陳麗如. « Effects of Blade Root Angle of Attack and Blade Twist on Fan Performance and Flow Characteristics ». Thesis, 2008. http://ndltd.ncl.edu.tw/handle/88011204003200186188.
Texte intégral國立臺灣科技大學
機械工程系
96
This study uses the STAR-CD, a commercial code of Computational Fluid Dynamics, to calculate and analyze the flow field characteristics and performance curve of an axial fan. The static grid is employed in the computation. A new computational approach other than the conventional simulation method, which is widely used by investigators, is developed. The flow field were obtained by changing the root angle, attack angle and blade torsion. Based on the data gathered from computer simulations, result show at least three emphases. First, the deviation of the calculated fan performance curve by using the new approach from the experimental results can attain a level less than 2%, which is a drastic improvement over that obtained by using the convention method. Second, during the separation, attach, vortex and recirculation flow at the surface of rotator blade, tip clearance and surface of stator blade will decay the fan’s performance. Such flow phenomenon dramatically decrease the worse performance of fan. Third, for the flow structure, changing the torsion angle will make the flow to become turbulent than changing the attack angle. Changing the fan’s attack angle guarantees better performance than changing the torsion angle.
Anusonti-Inthra, Phuriwat. « Helicopter vibration reduction using cyclic variations in blade root stiffness ». 1998. http://www.etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-194/index.html.
Texte intégralLivres sur le sujet "Blade-root"
S, Reddy E., et United States. National Aeronautics and Space Administration., dir. Root damage analysis of aircraft engine blade subject to ice impact. [Washington, DC] : National Aeronautics and Space Administration, 1992.
Trouver le texte intégralRoot damage analysis of aircraft engine blade subject to ice impact. [Washington, DC] : National Aeronautics and Space Administration, 1992.
Trouver le texte intégralChapitres de livres sur le sujet "Blade-root"
Thomre, Muktai, et K. Ramesh. « Analysis of Crack Growth in Compressor Blade Root Subjected to Fatigue ». Dans Challenges in Mechanics of Time Dependent Materials, Fracture, Fatigue, Failure and Damage Evolution, Volume 2, 109–13. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29986-6_17.
Texte intégralAllara, Marco, Stefano Zucca et Muzio M. Gola. « Effect of Crowning of Dovetail Joints on Turbine Blade Root Damping ». Dans Damage Assessment of Structures VII, 317–22. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-444-8.317.
Texte intégralBhamu, Rajesh K., Akash Shukla, S. P. Harsha et Satish C. Sharma. « Vibration Response of Fir Tree Root Blades with the Variation in Fixing Condition on Blade Root Interfaces ». Dans Lecture Notes in Mechanical Engineering, 881–87. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8025-3_83.
Texte intégralRamakrishnan, C. V., et M. A. W. Usmani. « Finite Element Modelling of Dynamic Contact Application for Blade Root Damping Estimation ». Dans Computational Mechanics ’86, 385–92. Tokyo : Springer Japan, 1986. http://dx.doi.org/10.1007/978-4-431-68042-0_51.
Texte intégralThomre, Muktai, et K. Ramesh. « Evaluation of Fracture Parameters of Cracks in Compressor Blade Root Using Digital Photoelasticity ». Dans Reliability, Safety and Hazard Assessment for Risk-Based Technologies, 557–66. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9008-1_46.
Texte intégralSirigu, M., E. Faraggiana, A. Ghigo, E. Petracca, G. Mattiazzo et G. Bracco. « Development of a simplified blade root fatigue analysis for floating offshore wind turbines ». Dans Trends in Renewable Energies Offshore, 935–41. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003360773-103.
Texte intégralFazeli Nahrekhalaji, A. R., M. Sohrabi et S. M. Izadi. « Investigation of Influences of Wheel Speed on Root Geometrical Dimension of Gas Turbine Blade ». Dans Proceedings of the 36th International MATADOR Conference, 101–4. London : Springer London, 2010. http://dx.doi.org/10.1007/978-1-84996-432-6_23.
Texte intégralDoliński, Łukasz, Marek Krawczuk et Arkadiusz Żak. « Damage Detection in the Wind Turbine Blade Using Root Mean Square and Experimental Modal Parameters ». Dans Lecture Notes in Mechanical Engineering, 728–42. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8331-1_57.
Texte intégralSchimke, D., Uwe T. P. Arnold, W. Geißler, R. Kube et W. R. Splettstösser. « Active Rotor Control by Servo-Flap and Blade Root Control Recent Results from Flight Test and Wind Tunnel ». Dans Notes on Numerical Fluid Mechanics (NNFM), 386–93. Wiesbaden : Vieweg+Teubner Verlag, 1999. http://dx.doi.org/10.1007/978-3-663-10901-3_50.
Texte intégralAlarcón Cabana, Daniel J., Jie Yuan et Christoph W. Schwingshackl. « A Novel Test Rig for the Validation of Non-linear Friction Contact Parameters of Turbine Blade Root Joints ». Dans Nonlinear Structures & ; Systems, Volume 1, 215–26. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04086-3_29.
Texte intégralActes de conférences sur le sujet "Blade-root"
KOTTAPALLI, SESI. « Blade root torsional dampers to reduce hub loads ». Dans 33rd Structures, Structural Dynamics and Materials Conference. Reston, Virigina : American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-2449.
Texte intégralAkay, Busra, Carlos Ferreira, Gerard van Bussel et G. Tescione. « Experimental Investigation of the Wind Turbine Blade Root Flow ». Dans 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-641.
Texte intégralBotto, Daniele, Veronica Iannotti et Federica Cuccovillo. « Experimental Investigation of Friction Damping in Blade Root Joints ». Dans ASME Turbo Expo 2022 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-81663.
Texte intégralŠimurda, David, Martin Luxa, Pavel Šafařík, Jaroslav Synáč et Bartoloměj Rudas. « Aerodynamic Data for Two Variants of Root Turbine Blade Sections for a 54″ Turbine Rotor Blade ». Dans ASME Turbo Expo 2014 : Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25323.
Texte intégralAllara, Marco, Sergio Filippi et Muzio M. Gola. « An Experimental Method for the Measurement of Blade-Root Damping ». Dans ASME Turbo Expo 2006 : Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90774.
Texte intégralGavelli, Filippo, Jude Foulds, Robert Sire et Harri Kytomaa. « Root Cause Analysis of a Gas Turbine Compressor Stator Blade Failure ». Dans ASME 2005 Power Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pwr2005-50125.
Texte intégralGowda, Kumar K., S. L. Ajit Prasad et Vinayaka Nagarajaiah. « Design Optimization of T-Root Geometry of a Gas Engine HP Compressor Rotor Blade for Lifing the Blade Against Fretting Failure ». Dans ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/power2016-59331.
Texte intégralGuerrant, Dan, et Dale Lawrence. « Heliogyro Solar Sail Blade Twist Stability Analysis of Root and Reflectivity Controllers ». Dans AIAA Guidance, Navigation, and Control Conference. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-4842.
Texte intégralZucca, Stefano, Christian M. Firrone et Muzio Gola. « A Method for the Calculation of Friction Damping in Blade Root Joints ». Dans ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24948.
Texte intégralSimmons, Harold R., et Vishwas Iyengar. « Effect of Non-Uniform Blade Root Friction and Sticking on Disk Stresses ». Dans ASME 2011 Turbo Expo : Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-46689.
Texte intégral