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Artykuły w czasopismach na temat „Winged blade”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Hoss, Kátia Arenhart, Rafael Trevisan, and Ana C. Rodrigues. "Origin of inverted vascular bundles in winged leaves of Scleria plusiophylla (Cyperaceae)." Botany 93, no. 12 (2015): 893–99. http://dx.doi.org/10.1139/cjb-2015-0019.

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The genus Scleria P.J. Bergius is pantropical, occurs in various habitats such as forests, fields, and wetlands, and is morphologically diverse. Some species have a winged sheath, which remains on the leaf blade and forms the last pair of costae. Anatomical observations of leaf blades of Scleria plusiophylla Steud. revealed the presence of inverted vascular bundles in the region of the wing. During the development of the shoot apical meristem of S. plusiophylla, it was observed that the wing emerges through divisions and enlargement of protoderm cells of the abaxial surface and subsurface cell

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2

Savov, V., and M. Raikov. "Autorotating rotor with ornithopter-like flapping blades." Aeronautical Journal 106, no. 1061 (2002): 399–409. http://dx.doi.org/10.1017/s0001924000092162.

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AbstractClassification of the winged aircraft according to the character of wing (blade) motion in horizontal and vertical plane is presented. Design of a rotor, the blades of which are driven into rotation via flapping motion similar to the movement of an ornithopter's wing is proposed and the principle of operation is considered. Mathematical model of the aerodynamics of the autorotating rotor with flapping blades in hover is made on the base of the helicopter rotor blade-element theory. Geometric and kinematic parameters influence on the rotor lift and efficiency is analysed. It is shown th

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3

Bhatnagar, Kirti, and Abhishek Dr. "Effect of Rotor Blade Geometry on the Performance of Rotary-Winged Micro Air Vehicle." Defence Science Journal 66, no. 6 (2016): 638. http://dx.doi.org/10.14429/dsj.66.9659.

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<p>The development of physics based analysis to predict the hover performance of a micro rotor system meant for a hover capable micro air vehicle for studying the role of blade geometric parameters (such as planform, twist etc.) is discussed. The analysis is developed using blade element theory using lookup table for the sectional airfoil properties taken from literature. The rotor induced inflow is obtained using blade element momentum theory. The use of taper seems beneficial in improving the hover efficiency for lower values of thrust coefficient. For rotors operating at high thrust c

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Vahabi, Arman, Ali Engin Dastan, Bunyamin Kilicli, et al. "Comparative analysis of radiological outcomes among cephalomedullary nails: helical, screw and winged screw." PeerJ 12 (September 19, 2024): e18020. http://dx.doi.org/10.7717/peerj.18020.

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Objective Cephalomedullary nails (CMN) are implants with a high success rate in the surgical treatment of trochanteric fractures. The aim of this study is to compare the radiological outcomes and mechanical complications of femoral trochanteric fractures treated with three different CMNs. Methods Intertrochanteric fractures in patients aged 50 years and older treated with CMN between January 2016 and December 2021 were reviewed retrospectively. A total of 158 cases meeting the criteria were included to final analysis. Cases were divided into three groups based on the type of nail used (helical

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5

Rosen, A., and D. Seter. "Vertical Autorotation of a Single-Winged Samara." Journal of Applied Mechanics 58, no. 4 (1991): 1064–71. http://dx.doi.org/10.1115/1.2897683.

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A derivation of a theoretical model for the vertical autorotation of a samara wing is presented. The dynamic effects are treated in an accurate manner. The aerodynamic effects are calculated by using the blade element/momentum theory. Because of basic differences between the mode of operation of a samara wing and other rotary wings, the model differs from existing rotary wing models. An experimental setup, aimed at verifying the theoretical model, is also described. Comparison between theoretical and experimental results are presented.

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DU, SI-YI, LIAN-SHENG XU, and YOU-SHENG CHEN. "Saussurea nanzhengensis (Asteraceae, Saussurea), a new species from Bashan Mountain, Central China." Phytotaxa 653, no. 3 (2024): 261–72. http://dx.doi.org/10.11646/phytotaxa.653.3.5.

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Saussurea nanzhengensis (Asteraceae), a new species from Bashan Mountain, Central China, is described and illustrated. The new species is similar to S. kungii in its petioles of basal and lower stem leaves winged and leaf blade lyrate lobed, leaf blade adaxially glabrous, phyllary arachnoid and apex distinctly free, but differs by its stem leaf numerous (vs. few or none), basal and lower stem leaves narrowly elliptic (vs. narrowly obovate to elliptic), terminal lobe more than half the length of the blade (vs. less than half the length of the blade), leaf margin entire or subentire (vs. denticu

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7

Bueno, Vinicius R., Leonardo S. Rodrigues, Francisco Diego Sousa, Izaías C. Souza, Juliana Marzinek, and Danilo Marques. "Wedelia figueiredoana (Asteraceae, Heliantheae), a winged cypselae new species of Wedelia for Brazil." PhytoKeys 249 (November 12, 2024): 37–49. http://dx.doi.org/10.3897/phytokeys.249.135699.

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We describe one new species from Ceará state, Brazil: Wedelia figueiredoana. It is morphologically associated with W. bonplandiana, but distinguished by 0.25–1.05 cm leaf blade width (vs. 1.5–2.6 cm), linear to narrow oblong leaf blade (vs. elliptic to spatulate), 3-seriate involucre (vs. 2-seriate), and cypselae 3.9–4 mm long (vs. 6–7 mm). An anatomical analysis of cypselae is provided, and we propose a more accurate terminology to describe similar wings to Wedelia species. We also provide a scientific illustration of the new species, photos of habitat, a map of its geographic occurrence, and

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Bueno, Vinicius R., Leonardo S. Rodrigues, Francisco Diego Sousa, Izaías C. Souza, Juliana Marzinek, and Danilo Marques. "Wedelia figueiredoana (Asteraceae, Heliantheae), a winged cypselae new species of Wedelia for Brazil." PhytoKeys 249 (November 12, 2024): 37–49. https://doi.org/10.3897/phytokeys.249.135699.

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We describe one new species from Ceará state, Brazil: <i>Wedelia figueiredoana</i>. It is morphologically associated with <i>W. bonplandiana</i>, but distinguished by 0.25–1.05 cm leaf blade width (vs. 1.5–2.6 cm), linear to narrow oblong leaf blade (vs. elliptic to spatulate), 3-seriate involucre (vs. 2-seriate), and cypselae 3.9–4 mm long (vs. 6–7 mm). An anatomical analysis of cypselae is provided, and we propose a more accurate terminology to describe similar wings to <i>Wedelia</i> species. We also provide a scientific illustration of the new species, photos of habitat, a map of its geogr

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9

Singh Tomar, Anshul, Harish K G, and K. Arul Prakash. "Numerical estimation of thermal load in a three blade vertically agitated mixer." E3S Web of Conferences 128 (2019): 08004. http://dx.doi.org/10.1051/e3sconf/201912808004.

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The objective of this study is to understand the flow physics and resulting heat transfer behind the mixing of highly viscous solid propellant in a vertical three blade mixer. The mixer comprises a four-winged central agitator rotating in the counter-clockwise direction and two other two-winged agitators rotating in clockwise direction. The temperature rises due to the shearing of the solid propellant. Uncontrolled temperature rise may result in the self-ignition of the propellant and other fire hazards. Thus it becomes important to quantify the heat generated due to viscous dissipation to att

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10

Hu, Ping-Ting, Yu-Ni Huang, Meng-Ni Zhang, et al. "A new species in Begonia sect. Diploclinium (Begoniaceae) from Guangxi, South China." PhytoKeys 249 (December 5, 2024): 277–85. https://doi.org/10.3897/phytokeys.249.133724.

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Although Guangxi represents one of the distribution centres of begonias in China, the sect. Diploclinium (Wright) A. DC is not well documented herein. In this article, we illustrate a new species belonging to this section, Begonia fangchengensis Y.N.Huang, X.X. Feng & R.K.Li, which has been discovered in southern Guangxi. Begonia fangchengensis mostly resembles B. rotundilimba in elliptic leaf blade, palmate veins, dichasial cyme, three styles, axile placentation, and unequally 3-winged capsule. On the other hand, B. fangchengensis is characterized by creeping rhizome, pilose stipule, red

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Hu, Ping-Ting, Yu-Ni Huang, Meng-Ni Zhang, et al. "A new species in Begonia sect. Diploclinium (Begoniaceae) from Guangxi, South China." PhytoKeys 249 (December 5, 2024): 277–85. https://doi.org/10.3897/phytokeys.249.133724.

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Although Guangxi represents one of the distribution centres of begonias in China, the sect. Diploclinium (Wright) A. DC is not well documented herein. In this article, we illustrate a new species belonging to this section, <i>Begonia fangchengensis</i> Y.N.Huang, X.X. Feng & R.K.Li, which has been discovered in southern Guangxi. <i>Begonia fangchengensis</i> mostly resembles <i>B. rotundilimba</i> in elliptic leaf blade, palmate veins, dichasial cyme, three styles, axile placentation, and unequally 3-winged capsule. On the other hand, <i>B. fangchengensis</i> is characterized by creeping r

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12

GUO, SHI-WEI, WEN-HONG CHEN, AUNG AUNG, et al. "Begonia nangunheensis, a new species of Begoniaceae from Yunnan province, China." Phytotaxa 480, no. 2 (2021): 201–9. http://dx.doi.org/10.11646/phytotaxa.480.2.9.

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Begonia nangunheensis belonging to Begonia sect. Platycentrum is described and illustrated as a new species in Caryota obtusa forests in Yunnan province of China. It is similar to Begonia siamensis in 3-winged fruits, 2-loculed ovary and axile placentation with 2 segments per locule, but differs in its glabrous petiole and abaxial leaf-blade, ovate outer tepals and oblanceolate to narrowly obovate inner tepals of staminate flower, and the unequal pistillate tepals. The new species is assigned to Critically Endangered according to the guidelines of IUCN Red List Categories and Criteria (version

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13

Dusiyorov, J.J., S.G'. Botirov, and A.M. O'ngboyev. "PARAMETERS OF THE OPENING ANGLE OF THE WINGED BLADES IN THE FERTILIZATION SYSTEM OF A CHISEL-CULTIVATOR." Multidisciplinary Journal of Science and Technology 5, no. 5 (2025): 594–98. https://doi.org/10.5281/zenodo.15411852.

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Due to ongoing climate change, the demand for water in agriculture is increasing annually, while water scarcity becomes more pronounced. Therefore, every drop of water must be efficiently conserved. Mineral nutrients are applied to improve the reclamation status of saline and gypsiferous soils before leaching them. However, these nutrients often do not reach the root layer of plants. To address this issue, we conducted a study to determine the optimal opening angle of the winged blades in the fertilizer system of a chisel-cultivator.

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14

Xue, Fu S., Jian H. Liu, Yu J. Yuan, and Xu Liao. "Comments on use of winged laryngoscope blade for endotracheal intubation in children with cleft lip." Pediatric Anesthesia 20, no. 1 (2010): 110–11. http://dx.doi.org/10.1111/j.1460-9592.2009.03214.x.

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15

Vithal, Dhulkhed, Desai Nitish, and Gupta Arun Kumar. "‘Use of winged laryngoscope blade for endotracheal intubation in a cleft lip child’- a case series." Pediatric Anesthesia 19, no. 12 (2009): 1246–47. http://dx.doi.org/10.1111/j.1460-9592.2009.03168.x.

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NEPOMUCENO, ÁLVARO, YOANNIS DOMÍNGUEZ, RAQUEL NEGRÃO, RENARA NICHIO AMARAL, VALQUÍRIA FERREIRA DUTRA, and ANDERSON ALVES-ARAÚJO. "New species of Salicaceae with opposite leaves from the Atlantic Forest, Brazil." Phytotaxa 662, no. 2 (2024): 150–60. http://dx.doi.org/10.11646/phytotaxa.662.2.3.

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Abatia mantiqueirensis is described and illustrated as a new species with distribution for the Brazilian states of Minas Gerais and Rio de Janeiro. It is morphologically similar to A. americana but can be distinguished by the presence of canaliculated petiole, acute serrate leaf margin, glands at the apex of the margin serrations that are rounded to concave and projected outwards from the leaf blade, upper portion of the pedicel winged and seeds with tiny dorsal wings. Taxonomic description, comments, and geographical distribution information are here in provided. So far, only three population

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17

Dumont, Dr Clara. "EXPERIMENTAL AERODYNAMIC CHARACTERIZATION OF STRAIGHT-BLADED VERTICAL AXIS WIND TURBINES IN A CONTROLLED WIND ENVIRONMENT." International Journal of Renewable, Green, and Sustainable Energy 02, no. 02 (2025): 7–13. https://doi.org/10.55640/ijrgse-v02i02-02.

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This study presents an experimental aerodynamic characterization of straight-bladed vertical axis wind turbines (VAWTs) under controlled wind tunnel conditions. The investigation focuses on understanding the performance behavior and flow dynamics around the turbine blades at various tip speed ratios and wind velocities. High-precision instruments were used to measure torque, rotational speed, and pressure distribution, while flow visualization techniques provided insights into wake formation and blade-vortex interaction. The results indicate that the aerodynamic performance of straight-bladed

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WANG, CHENG-LONG, ZHI-QIANG LI, MENG-QI DING, et al. "Fagopyrum longzhoushanense, a new species of Polygonaceae from Sichuan, China." Phytotaxa 291, no. 1 (2017): 73. http://dx.doi.org/10.11646/phytotaxa.291.1.7.

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Fagopyrum longzhoushanense (Polygonaceae) is here described and illustrated as a new species from Longzhoushan (Puge County, Sichuan Province, China) on the basis of morphological, caryological and molecular analyses. The new species is morphologically similar to F. gracilipes from which it differs in having densely pubescent or villose parts, thicker and red-brown stems and branches, dense nodes, rugulose and small postulate leaf blade on the surface, stamens longer than pistils. Another similar species is F. densovillosum from which F. longzhoushanense differs by the winged and greater achen

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19

Arefi, Mohadeseh, Seyed Hossein Karparvarfard, Hadi Azimi-Nejadian, and Mojtaba Naderi-Boldaji. "Draught force prediction from soil relative density and relative water content for a non-winged chisel blade using finite element modelling." Journal of Terramechanics 100 (April 2022): 73–80. http://dx.doi.org/10.1016/j.jterra.2022.01.001.

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Rabei, Ivan. "THE PERFORMANCE OF DIFFERENT VERTICAL AXIS WIND TURBINES WITH J-SHAPED BLADES." Journal of Engineering Science XXVII (2) (May 4, 2020): 24–36. https://doi.org/10.5281/zenodo.3784283.

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This study is focused on the aerodynamic optimization of Vertical Axis Wind Turbines' blades. A special feature was investigated – the opening at the blade’s trailing edge (opened blades). The blades having this element are known as J-shaped blades. The analysis was done experimentally by testing eleven small scale turbines which were organized into four sets. The performance was compared within each set which contained both full and open bladed turbines. Two airfoil types were examined: symmetrical NACA 0018 and asymmetrical FX 63-137, and two types of blades: straight and hel

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GUO, XIAN LIN, CHANG BAO WANG, JUN WEN, SONGDONG ZHOU, and XING JIN HE. "Phylogeny of Chinese Chamaesium (Apiaceae: Apioideae) inferred from ITS, cpDNA and morphological characters." Phytotaxa 376, no. 1 (2018): 1. http://dx.doi.org/10.11646/phytotaxa.376.1.1.

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Chamaesium (Apiaceae) is a morphologically specific genus distributed mainly at high altitudes from East Himalaya to Southwest China. China is an important diversity center of Chamaesium, where most of its species occur. It differs from most Apiaceae taxa by 1- pinnate leaf blade, and fruit with primary and secondary ribs all prominent to narrowly winged. The objective of the present study is to contribute to the phylogenetic relationships within Chamaesium, using the nuclear internal transcribed spacer (ITS) and three plastid makers (rpl16, rps16 and trnT-trnL). Nine species involving 28 popu

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Oleksandr, Yurchenko, Radchuk Oleg, Barsukova Hanna, et al. "Determining a model of the blade in a wind turbine for regions with low wind speeds." Eastern-European Journal of Enterprise Technologies 2, no. 8(122) (2023): 44–52. https://doi.org/10.15587/1729-4061.2023.277896.

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The object of research is the shape of the blade of a vertical-axis installation. The problem solved in this work is to find the optimal shape of the blade for a wind power installation for operation at low wind speeds or in areas where its flow is limited. In the course of the work, the interaction between each blade option and the wind flow depending on the shape of the blade was considered. With the help of a reduced model of the wind turbine, a flat blade, a blade with a «pocket», and a blade with a «pocket» and a slit were tested. The test results prove the effecti

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Jun, Xu, and Tovar Adolfo. "Aerodynamic Modeling of a Small-Scale Vertical Axis Wind Turbine." American Journal of Advanced Research 3, no. 2 (2019): 20–25. https://doi.org/10.5281/zenodo.3372446.

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In this study, a small-scale five bladed 2D model was adopted to investigate the VAWT aerodynamics. A CFD model of the blades was created in ANSYS Fluent. The CFD results demonstrated that the model was capable of capturing the effect that the rotor encounters vortex interactions where the retreating blade impinges on its own wake and the wakes of other preceding blades. In addition, the results showed that as the rotational speed increases the downwind wake becomes more skewed, evidenced by the vorticity and turbulence kinetic energy fields. Based the simulation results, modeling limitations

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Medved, Victor, James H. Marden, Howard W. Fescemyer, et al. "Origin and diversification of wings: Insights from a neopteran insect." Proceedings of the National Academy of Sciences 112, no. 52 (2015): 15946–51. http://dx.doi.org/10.1073/pnas.1509517112.

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Winged insects underwent an unparalleled evolutionary radiation, but mechanisms underlying the origin and diversification of wings in basal insects are sparsely known compared with more derived holometabolous insects. In the neopteran species Oncopeltus fasciatus, we manipulated wing specification genes and used RNA-seq to obtain both functional and genomic perspectives. Combined with previous studies, our results suggest the following key steps in wing origin and diversification. First, a set of dorsally derived outgrowths evolved along a number of body segments including the first thoracic s

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Cheek, Martin, and Jean Michel Onana. "The endemic plant species of Mt Kupe, Cameroon with a new Critically Endangered cloud-forest tree species, Vepris zapfackii (Rutaceae)." Kew Bulletin 76, no. 4 (2021): 721–34. http://dx.doi.org/10.1007/s12225-021-09984-x.

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SummaryWe revise and update the records of strict and near-endemic species of Mt Kupe, Cameroon respectively from 31 strict endemics in 2004, to 25 today, and with near-endemic species 30, unchanged in number but with turnover. The changes result from new collections, discoveries and taxonomic changes in the last 16 years. While 15 of the provisionally named putative endemic species have now been formally published, a further 18 have not. The majority of the 30 near-endemic species (18) are shared with the adjacent Bakossi Mts, far exceeding the numbers shared with the more distant Mt Etinde-M

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Madi, Madi, Tuswan Tuswan, Ilham Dwi Arirohman, and Abdi Ismail. "Comparative Analysis of Taper and Taperless Blade Design for Ocean Wind Turbines in Ciheras Coastline, West Java." Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 18, no. 1 (2020): 8–17. http://dx.doi.org/10.14710/kapal.v18i1.32486.

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The blade is the most critical part of turbine design because it is used to convert kinetic to mechanical energy. In general, the blade types used for ocean wind turbines are taper and taperless blades, like those operated at Ciheras Coastline. Previous research has been analyzed the type of airfoil used in designing taper blades for ocean wind turbines using NACA 4412, which was selected as the optimal foil configuration at sea wind speeds of 12 m/s. In this study, the comparison of taper and taperless blade designs using NACA 4412 at a wind speed of 12 m/s is analyzed. The comparative study

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Oliveira, Mariana Schmidt, and Luis Henrique Alves Cândido. "DESIGNING BLADES FOR HORIZONTAL-AXIS WIND TURBINES APPLIED TO MICRO ENERGY." International Journal of Advances in Engineering & Technology 10, no. 1 (2017): 10–19. https://doi.org/10.5281/zenodo.3951340.

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<em>Electricity generation through small wind turbines is <em>gaining</em> worldwide popularity. However, studies that describe and analyze this source of energy are still scarce compared to those that analyze the medium and large wind turbines. Therefore, the present study aimed to analyze the National Advisory Committee for Aeronautics (<em>NACA</em>) blade profile considering its design adequacy to be applied to the design of the small horizontal-axis wind turbine blades. The number of rotation per minute (RPM) of the 3 blade profiles was based on the design of NACA 0012, 1412, 6409 profile

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Tleubergenova, A. Zh. "INVESTIGATION OF AERODYNAMIC THRUST FORCE OF THE WIND POWER PLANT WITH COMBINED BLADES." Eurasian Physical Technical Journal 20, no. 2 (44) (2023): 65–69. http://dx.doi.org/10.31489/2022no2/65-69.

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In this article, a wind power plant with a horizontal axis of rotation operating under conditions of variable wind speeds is considered. For this purpose, a mock-up of a wind power plant with rotating combined blades was made. During the experiments, the angle of the fixed blade relative to the cylinder changed from 0° to 60°, in increments of 15 °. The air flow rate varied, from 3 to 12 m/s. The analysis of the results of the experiment on the change of the rotation frequency from the air flow velocity of the wind power plant is carried out. When changing the position of the fixed blade (0°,

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Tanasheva, N. K. "INVESTIGATION OF THE AERODYNAMIC FORCES OF A TRIANGULAR WIND TURBINE BLADE FOR THE LOW WIND SPEEDS." Eurasian Physical Technical Journal 18, no. 4 (38) (2021): 59–64. http://dx.doi.org/10.31489/2021no4/59-64.

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This article investigates the aerodynamic characteristics and finds the critical angle of attack of a triangular sail blade of a wind turbine for low wind speeds. For this purpose, a triangular sail blade of various parameters has been developed. The prototype is made of metal frame rods, the material of the triangular sail blade consists of a light and durable material (silk), one end of which is fixed to the top of the frame with a strong thread and support rods and bearing with an inner diameter of 8 mm. A sail blade differs from other blades in that the sails are made with the ability to c

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Кауаn, V. "DARRIEUS TYPE WIND TURBINE WITH CONTROLLED BLADES." Eurasian Physical Technical Journal 17, no. 2 (2020): 69–72. http://dx.doi.org/10.31489/2020no2/69-72.

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The results of studies on possibility of increasing efficiency in the use of wind energy and improving the dynamic characteristics of Darrieus wind turbine with straight blades are described. It is shown how the values of torque on the rotor shaft may be optimized by controlling the orientation of the turbine blades relative to the oncoming flow. Control of blades was provided with a cylindrical track of the special form in plan. The track form allowed to establish optimum angle of attack on each site of blade circular trajectory. It allowed to increase power coefficient Cp by 1.5 times and to

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Sanusi, Arifin, Jahirwan Ut Jasron, and Sudirman Syam. "Experimental study on the use of Savonius combined blade rotors as wind turbines and hydrokinetic turbines." International Journal of Power Electronics and Drive Systems 16, no. 1 (2025): 555–63. https://doi.org/10.11591/ijpeds.v16.i1.pp555-563.

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Renewable energy development is increasingly important to anticipate the limited use of fossil energy and its impact on the environment. The Savonius turbine is a vertical axis turbine that can utilize flow from all directions with simple construction, so it has the potential to be developed as a wind turbine and hydrokinetic to generate electricity. This paper aims to conduct an experimental studied the same Savonius combined blade rotor as a wind turbine used in a wind tunnel and a hydrokinetic turbine in an irrigation channel. The experimental results show that the Savonius turbine can func

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Kwanjai, Nachaiyaphum, and Photong Chonlatee. "An electric power generation improvement for small Savonius wind turbines under low-speed wind." An electric power generation improvement for small Savonius wind turbines under low-speed wind 29, no. 2 (2023): 618–25. https://doi.org/10.11591/ijeecs.v29.i2.pp618-625.

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Savonius wind turbines have advantages of self-rotating at low speed wind, high starting torque, and less noise generation. However, they have low electric power generation capacity. This paper presents electric power generation improvement for small Savonius wind turbines when operating at low-speed wind of 1-6 m/s by using optimal Bach-type blades, twist blades and a wind tunnel. The turbine prototypes with the optimum diameter and height of 32 cm were developed with 3 different blade types: conventional semicircular blades, Bach-type blades and twisted 15° blades and a wind tunnel. The

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Tanasheva, N. K. "NUMERICAL SIMULATION OF THE FLOW AROUND A WIND WHEEL WITH ROTATING CYLINDRICAL BLADES." Eurasian Physical Technical Journal 18, no. 1 (2021): 51–56. http://dx.doi.org/10.31489/2021no1/51-56.

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The article discusses the results of numerical simulation of the flow around a wind wheel with blades in the form of rotating cylinders using the software package ANSYS. The advantage of a wind turbine with rotating cylindrical blades in comparison with traditional blade installations is the starting moment and the beginning of energy production at a wind speed of (2 - 3) m/s. A mathematical model has been developed based on threedimensional Navier-Stokes equations in a rotating system. The corresponding boundary conditions are formulated. A calculated pattern of the flow around the wind wheel

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Beabpimai, Wiroj, and Tawit Chitsomboon. "Numerical Study of Effect of Blade Twist Modifications on the Aerodynamic Performance of Wind Turbine." International Journal of Renewable Energy Development 8, no. 3 (2019): 285–92. http://dx.doi.org/10.14710/ijred.8.3.285-292.

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This paper aims to investigate aerodynamic performance of a wind turbine blade with twist modifications using computational fluid dynamics (CFD). The phenomenon of 3D stall-delay effect in relation to blade twist is the key feature to be investigated in order to improve efficiency of a wind turbine. The NREL (National Renewable Energy Laboratory) Phase VI wind turbine rotor was used for validation and as the baseline rotor. The baseline blade geometry was modified by increasing/decreasing the twist angles in the inboard, mid-board and outboard regions of the blade in the form of a symmetrical

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MR., M.P. JAGTAP, and L.G. NAVALE DR. "TWIST ANGLE ANALYSIS OF HELICAL VERTICAL AXIS WIND TURBINE (VAWT) USING Q-BLADE." JournalNX - a Multidisciplinary Peer Reviewed Journal 3, no. 8 (2017): 94–98. https://doi.org/10.5281/zenodo.1420799.

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In this paper the analysis of DU-06-W200 and NACA 0018 , NACA 0021 airfoil using Q-Blade & analytical method is investigated . The power produced by 1 kw wind turbine with Helical blade for the twist angle (Ñ±) 30Â° , (Ñ±) 60Â° (Ñ±) 90Â° (Ñ±) 120Â° configurations are analyzed with Q-Blade open source simulator software. The basic principal of double â€“multiple stream tube model (DMS) utilized for determination of energy extracted by wind blade from the fluid by reducing its vel

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Papković, Dora, and Antun Jelinčić. "Yellow-winged digging grasshopper, Acrotylus longipes (Acrididae: Oedipodinae), confirmed in Croatia." Journal of Orthoptera Research 28, no. 1 (2019): 1–2. http://dx.doi.org/10.3897/jor.28.30736.

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We present the first confirmed record of the threatened yellow-winged digging grasshopper, Acrotyluslongipes (Acrididae: Oedipodinae), from Croatia, from the island of Mljet, in Blace Bay. The yellow-winged digging grasshopper was found on sandy dunes covered with psammophytic vegetation characteristic of this type of habitat. Previously, only two localities of this species were reported from Croatia, both from photographs. This confirmed locality opens the possibility of a wider distribution of this species on similar habitats throughout Croatia.

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Papković, Dora, and Antun Jelinčić. "Yellow-winged digging grasshopper, Acrotylus longipes (Acrididae: Oedipodinae), confirmed in Croatia." Journal of Orthoptera Research 28, no. (1) (2019): 1–2. https://doi.org/10.3897/jor.28.30736.

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We present the first confirmed record of the threatened yellow-winged digging grasshopper, Acrotylus longipes (Acrididae: Oedipodinae), from Croatia, from the island of Mljet, in Blace Bay. The yellow-winged digging grasshopper was found on sandy dunes covered with psammophytic vegetation characteristic of this type of habitat. Previously, only two localities of this species were reported from Croatia, both from photographs. This confirmed locality opens the possibility of a wider distribution of this species on similar habitats throughout Croatia.

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Mr., K. Prakash R.Sreeju S.Vijaychandran A.R.Sridharan. "OPTIMISATION OF WIND TURBINE WITH DIFFUSER USING CFD TOOL." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 1 (2017): 292–96. https://doi.org/10.5281/zenodo.250381.

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A wind turbine or wind power plant is a device that converts kinetic energy from the wind into electric current. Mechanical energy is simply created when the wind turbine blades spin and a generator is turned, thus producing electricity. Diffuser can increase turbine power output primarily by increasing mass flow rate through the blades because of controlled diffusion of the turbine wake which which lowers the exit plane pressure considerably below atmospheric, and secondarily by reducing blade tip losses. The principle object of this project is to fully assess comparison of angular velocity a

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Albert, Francis A*1 Hemanth Raj C2 &. Ajith Kumar R3. "WIND TURBINES FOR ROADWAYS." INTERNATIONAL JOURNAL OF RESEARCH SCIENCE & MANAGEMENT 4, no. 5 (2017): 93–96. https://doi.org/10.5281/zenodo.574450.

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Our effective design of horizontal axis certain angled wind turbines are applicable for side and top of road ways,bridges and top roof.The curved shape six blades are designed to efficiently collect the wind velocity to attain maximum efficiency.The contact distance of the vehicle and blades are indirectly proportional to the power generation.In short distance maximum revolution of blades through wind velocity is obtained to produce maximum power. Our design produces constant power for all the time.The blade connected to the shaft is attached with generator.The device convert mechanical energy

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Rabei, Ivan. "EXPERIMENTAL OBSERVATIONS ON EFFICIENCY DIFFERENCE BETWEEN HELICAL AND STRAIGHT BLADED VERTICAL AXIS WIND TURBINES." Journal of Engineering Science XXVII (4) (December 15, 2020): 37–44. https://doi.org/10.5281/zenodo.4288258.

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While in operation, the straight bladed vertical axis wind turbines (VAWTs) are affected by the variations in loadings that result in torque and power oscillations. This problem is considered to be solved by adopting helical blades. However, the way this solution affects the turbine’s efficiency is not entirely clear thus this aspect was studied and the results are presented in this paper. Four small scale VAWTs were investigated. A set consisting of one straight bladed turbine and one helical bladed turbine was tested. The airfoil used for this case was the symmetrical NACA 0018. Except

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Fitria, Hidayanti, Kusuma Wati Erna, Yohanes, and Untoro Pudji. "Design of Savonius-Darrieus a Hybrid Wind Turbine." International Journal of Management and Humanities (IJMH) 3, no. 7 (2020): 107–9. https://doi.org/10.35940/ijmh.G0724.034720.

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Savonius wind turbine design use type two blades with a diameter of 15.5 cm, a height of 10.9 cm and turbine weight of 51.3 g. The Darrieus wind turbine design uses type three blades with dimensions 21.8 cm x 8.7 cm x 2.3 cm. The weight of each blade is 51.3 g with the angle between the blades being 120⁰. The voltage of 2.5 V produced a minimum turbine rotation speed of 284.2 rpm and a maximum of 296.0 rpm. When the voltage was increased to 5.0 V, the minimum speed is 342.8 rpm and a maximum speed of 366.4 rpm. When given a voltage of 7.5 V, a minimum speed of 461.7 rpm and a maximum of 481.3

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Pelumi, Peter Aluko-Olokun. "Comparative analysis of carbon fibre and glass fibre in blade design." World Journal of Advanced Research and Reviews 24, no. 3 (2024): 1930–40. https://doi.org/10.5281/zenodo.15201782.

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This study investigates the performance, environmental impact, and economic viability of single-blade carbon fibre wind turbines compared to traditional three-blade glass fibre designs. Finite Element Analysis (FEA) demonstrates carbon fibre's superior stiffness and vibration properties, while Computational Fluid Dynamics (CFD) simulations identify optimal aerodynamic performance at specific angles of attack. A Life Cycle Assessment (LCA) reveals that, despite significantly higher carbon emissions and energy consumption during manufacturing, carbon fibre blades produce fewer SO₂-equivalent emi

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Tleubergenova, A. Zh. "EXPERIMENTAL STUDIES OF THE PERFORMANCE EFFICIENCY OF A WIND TURBINE WITH COMBINED BLADES." Eurasian Physical Technical Journal 21, no. 2(48) (2024): 31–37. http://dx.doi.org/10.31489/2024no2/31-37.

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This article studies the aerodynamic characteristics of a wind turbine at different streamline parameters. For this purpose, an experimental sample of the plant with combined power elements in rotating cylinders form with fixed blades was fabricated. The airflow velocity was varied, ranging from 3 to 12 m/s. The results of the experiment to study the variation of the angle α of the fixed blade position relative to the cylinder from the air flow velocity were analyzed. The changes in aerodynamic forces from the air flow velocity are graphically presented. It was found that at the optimal angle

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Dhiresh, Shastri, Kaware Kiran, and Sulakhe Vishal. "Computational Fluid Dynamics Analysis of Wind Turbine for Different Tilt Angles." Journal Of Scientific Advances 2, no. 1 (2025): 1–12. https://doi.org/10.5281/zenodo.15183994.

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Energy consumption and environmental degradation due to conventional fuel consumption is important criteria for researchers in the world. The solar and wind energy are abundantly available which can be used day and night time in different part of the earth. The attention is made on wind power production in rural and urban areas along with wind farms. It is found that multi rotor wind plants are superior over single rotor. In the current study, attention is focused on small wind power plants for different tilt angles. CFD simulations are carried out on NACA 5510 airfoil blade to test rotational

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Sang, Le Quang, Takao Maeda, and Yasunari Kamada. "Study effect of extreme wind direction change on 3-bladed horizontal axis wind turbine." International Journal of Renewable Energy Development 8, no. 3 (2019): 261–66. http://dx.doi.org/10.14710/ijred.8.3.261-266.

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The Horizontal Axis Wind Turbines (HAWT) are used very popular in the world. They were installed mainly on land. However, on the land, the wind regime change is very complex such as high turbulence and constantly changing wind direction. In the International Electrotechnical Commission (IEC) 61400-1 standard, the wind regime is devided into the normal wind conditions and the extreme wind conditions. This study will focus on the extreme wind direction change and estimate the aerodynamic forces acting on a 3-bladed HAWT under this condition. Because the extreme wind direction change may cause ex

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KLJUYKOV, EUGENE, DMITRY LYSKOV, ULIANA UKRAINSKAJA, TAHIR SAMIGULLIN, and ELENA TERENTIEVA. "Heracleum piliferum (Apiaceae), a new species from central Nepal." Phytotaxa 500, no. 3 (2021): 166–78. http://dx.doi.org/10.11646/phytotaxa.500.3.2.

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A new species, Heracleum piliferum (Apiaceae), is described from the Annapurna mountain massif, central Nepal. The new species is related to H. forrestii and H. hemsleyanum and differs from them in dense pubescence of petioles, short triangular sheaths of stem leaves, 2-pinnate leaf blades, shallow notched terminal leaf segments, crenulate leaf margin, larger terminal umbels, and broadly winged lateral ribs of the mericarps.

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Komlan, LOLO, and OUEDRAOGO Seydou. "Exploitation of the elastic behavior of Borassus in the development of wind blades." World Journal of Advanced Research and Reviews 20, no. 2 (2023): 1371–76. https://doi.org/10.5281/zenodo.12609046.

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Wind turbines have existed since ancient times and helped man accomplish various tasks. The essential organ is the blade allowing the energy of the wind to be transformed into desired energy. According to its role, the choice of material for its manufacture was the subject of several researches because of the expected weight and the multiple demands. Although wood in general was refuted because of its degradation, borassus remains tenacious in the face of bad weather and various stresses. Several material resistance tests carried out on borassus specimens showed its elasticity, proof of its us

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Bodkhe, Vishal Digambar. "Design and Development of Vortex Blade less Wind Turbine." International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (2018): 2460–62. http://dx.doi.org/10.31142/ijtsrd12804.

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SOUZA, MARIA ANÁLIA DUARTE DE, and MARCOS SOBRAL. "Six new Amazonian Myrtaceae." Phytotaxa 425, no. 3 (2019): 113–26. http://dx.doi.org/10.11646/phytotaxa.425.3.1.

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There are described and illustrated Eugenia andiraana, E. libens, Myrcia iranduba, M. javariana, M. piptocalyx and Plinia rufiflora, all from Amazonian Brazil; additionally, affinities and conservation issues are discussed for each species. Eugenia andiraana, from the state of Acre, is morphologically related to E. minuscula, differing by its pilose, longer blades; E. libens, from the state of Roraima, is related to E. callichroma, but has wider blades, persisting bracteoles and locules of the ovary with less ovules; M. iranduba is related, between others, to M. inaequiloba, but differs by its

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Ibtissem, Barkat, Benretem Abdelouahab, Massouh Fawaz, Meghlaoui Issam, and Chebel Ahlem. "Modeling and simulation of forces applied to the horizontal axis wind turbine rotors by the vortex method coupled with the method of the blade element." International Journal of Power Electronics and Drive System (IJPEDS) 12, no. 1 (2021): 413–20. https://doi.org/10.11591/ijpeds.v12.i1.pp413-420.

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This article aims to study the forces applied to the rotors of horizontal axis wind turbines. The aerodynamics of a turbine are controlled by the flow around the rotor, or estimate of air charges on the rotor blades under various operating conditions and their relation to the structural dynamics of the rotor are critical for design. One of the major challenges in wind turbine aerodynamics is to predict the forces on the blade as various methods, including blade element moment theory (BEM), the approach that is naturally adapted to the simulation of the aerodynamics of wind turbines and the dyn

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