Results 61 to 70 of about 372,321 (309)
Aerodynamic Optimization Design of a Supersonic Compressor Rotor with High Pressure Ratio
International Journal of Aerospace Engineering, 2021 Supersonic compressors have a high wheel speed and operational capability, which facilitate a high stage pressure ratio. However, the strong shock waves in the passage of a supersonic rotor and the interference between shock waves and boundary layers can
Cui Cui, Zhenggui Zhou, Endor Liu
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Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma
Advanced Engineering Materials, EarlyView.The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie +4 more
wiley +1 more source
Wind Turbines Theory - The Betz Equation and Optimal Rotor Tip Speed Ratio
, 2011 The fundamental theory of design and operation of wind turbines is derived based on a first principles approach using conservation of mass and conservation of energy in a wind stream. A detailed derivation of the “Betz Equation” and the “Betz Criterion” or “Betz Limit” is presented, and its subtleties, insights as well as the pitfalls in its derivation
Ragheb, Magdi, Ragheb, Adam M.
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Effects of geometry and tip speed ratio on the HAWT blade's root flow
Journal of Physics: Conference Series, 2014 In this study, the effect of the parameters playing a role in the root flow behavior of HAWT are only partly understood. To better reveal the root flow properties, this study presents the progression of HAWT blade root flow at two different blade geometries and at two different tip speed ratios.
Akay, B. (author) +3 more
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Nanoindentation Criteria for Combinatorial Thin Film Libraries
Advanced Engineering Materials, EarlyView.Thin‐film material libraries are compositional spreads used for screening composition‐structure‐property relationships. Nanoindentation is often used to characterize mechanical behavior across these systems, however variations in methodology are widespread.
Andre Bohn, Adie Alwen, Andrea M. Hodge
wiley +1 more source
Journal of Applied Fluid Mechanics, 2018 Wind tunnel experiments were conducted on a 2-blade horizontal axis wind rotor to investigate the effect of pitch angle and Reynolds number on aerodynamic characteristics.
J. Y. Zhu, P. Q. Liu
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Influence of design parameters on the performance of slotted Savonius hydrokinetic turbine
Results in EngineeringThe main objective of this study is to optimize the performance of slotted Savonius hydrokinetic turbine by investigating the effects of blade profile (semi-circular, elliptical, Benesh, NACA6409), number of blades (2–4), overlap ratio (0.05–0.20), gap ...
Rishabh Kumar, Anuj Kumar
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Dynamic growth of an interfacial crack between the two anisotropic materials [PDF]
FME Transactions, 2014 In this paper is considered behavior of the stress field around the tip of a crack that propagates dynamically along the interface between the two anisotropic materials.
Đoković Jelena M. +3 more
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Determination Method of Critical Best Tip Speed Ratio for the Vertical Axis Wind Turbine [PDF]
The Open Mechanical Engineering Journal, 2015 Tip speed ratio is an important parameter of describing wind turbine performance. Based on vane airfoil profile, the relationship between vane lift coefficient, drag coefficient and angle of attack is calculated by means of Profili software. The corresponding stall angle is also obtained. The relationship between the position angle of vane and angle of
Zhang Lijun +3 more
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Advanced Engineering Materials, EarlyView.Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan +3 more
wiley +1 more source