Results 21 to 30 of about 40,293 (167)
Computational fluid dynamics trimming of helicopter rotor in forward flight
Advances in Mechanical Engineering, 2020 A computational fluid dynamics (CFD) trimming method based on wind tunnel and flight test data is proposed. Aerodynamic coefficients obtained for a helicopter rotor using this method were compared with both experimental data from a test report and CFD ...
Chenglong Zhou, Ming Chen
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Effect rules of aft propeller pitch angle on the performance of contra rotation propeller
Hangkong gongcheng jinzhan, 2023 The pitch angle of the contra rotation propeller (CRP) has important effect on the aerodynamic interference between the front and aft blades,which can change the aerodynamic performance of the propeller.
SUN Zhaozheng, YAN Wenhui, CAO Desong
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Pitch angle variations in spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 11 pages, 11 figures, accepted for publication in Monthly Notices of the Royal Astronomical ...
Savchenko, S. S., Reshetnikov, V. P.
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Critical pitch angle for electron acceleration in a collisionless shock layer [PDF]
Annales Geophysicae, 2016 Collisionless shock waves in space and astrophysical plasmas can accelerate electrons along the shock layer by an electrostatic potential, and scatter or reflect electrons back to the upstream region by the amplified magnetic field or turbulent ...
Y. Narita +4 more
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Energies, 2018 In addition to human error, manufacturing tolerances for blades and hubs cause pitch angle misalignment in wind turbines. As a consequence, a significant number of turbines used by existing wind farms experience power production loss and a reduced ...
Unai Elosegui +3 more
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DESIGN AND PERFORMANCE OF A 300-WATT HELICAL TYPE H-ROTOR WIND TURBINE
Rekayasa MesinThe Helical Type H-rotor turbine is a modification of the Darrieus turbine by Alexander Gorlov to improve the design of the H-Darrieus so the turbine can self-starting in low wind speed conditions. The purpose of this study is to analyze the pitch angle (
Diniar Mungil Kurniawati +4 more
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Fault Diagnosis Method of Wind Turbine Pitch Angle Based on PCA-KNN Fusion Algorithm
Zhongguo dianli, 2021 With regard to the four main fault types of the pitch angle of a wind turbine pitch system and the data analysis of the wind turbine, an identification method of abnormal pitch angles of a wind turbine is proposed, depending on nonparametric kernel ...
Xi CHEN +5 more
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Journal of Marine Science and Engineering, 2022 The underwater glider has difficulty accessing the complex and narrow hadal trench for observation, which is affected by its limited regulation capability of pitch angle (−45°~45°).
Peng Wang +6 more
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EFFECT OF PITCH ANGLE ON WIND TURBINE PERFORMANCES [PDF]
, 2023 The rising cost of fossil fuels has prompted a shift towards environmentally friendly alternative energy sources, leading to an expansion in the study of renewables. Wind turbines, specially those of the small-scale variety, have emerged as a promising solution for generating sustainable electricity, particularly in rural areas and for smaller ...
Tanović, Dragoljub +3 more
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Longitudinal automatic carrier-landing control law rejecting disturbances and coupling based on adaptive dynamic inversion [PDF]
Bulletin of the Polish Academy of Sciences: Technical Sciences, 1921 The longitudinal automatic carrier landing system (ACLS) control law is designed based on nonlinear dynamic inversion (NDI), which can reject air wake, decouple lateral states, and track the dynamic desired touchdown point (DTP).
Lipeng Wang +3 more
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