Results 171 to 180 of about 32,908 (214)
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Trailing edge noise mitigation investigation for wind turbine blades
The Journal of the Acoustical Society of America, 2012Wind turbines offer one of the most mature technologies for providing large scale renewable energy to society in an economically viable way. Although not on par with the price of conventional energy sources yet, the cost of energy has been steadily decreasing as the technology continues to develop. Unfortunately, like with all energy sources, there are
Michael J. Asheim +2 more
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Lower pressure drop turbine blade trailing-edge cooling configuration
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2014Numerical results for a proposed turbine blade trailing-edge cooling configuration are presented. This proposed configuration is meant to result in the same or higher heat transfer performance but with a reduced pressure drop through the passage. The most common trailing-edge cooling configuration is composed of circular pin fin which increases heat ...
Grazieli Luiza Costa Carosio +1 more
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Blade Tonal Noise Reduction Using Stator Trailing-Edge Articulation
Volume 2: Fora, 2005The biologically-inspired method of trailing-edge articulation is investigated as a means of reducing tonal noise due to the stator wake / rotor blade interaction in underwater vehicles. This work is experimental in nature and conducted in the closed channel water tunnel at Naval Undersea Warfare Center in Newport, Rhode Island.
David N. Beal +3 more
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Fan Blade Trailing-Edge Noise Prediction Using RANS Simulations
The Journal of the Acoustical Society of America, 2008An analytical model based on Paterson & Amiet's work dealing with the trailing-edge noise of a blade has been previously validated thanks to a dedicated experiment on a low speed axial fan. Wall-pressure spectra near the trailing-edge of the blade and at different radii are needed for an accurate prediction. Only experiments and LES simulations are
Yannick Rozenberg +2 more
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Wavy Trailing Edge Feasibility for Aircraft Engine Composite Fan Blade
Materials Science Forum, 2022Attempts to add the advanced technologies to aerospace composite structures like fan blade have been on in recent times to further improve its performance. As part of these efforts, it has been proposed that the wavy trailing edge could be used in the blade to reduce the noise level.
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CHARACTERIZATION OF TRAILING EDGE BROADBAND NOISE FROM WIND TURBINE BLADES
INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 2021Wind turbine noise is a critical issue for siting and its operation in offshore and terrestrial conditions. In this work, we analysed trailing edge bluntness vortex shedding noise source for a land based turbine of size 2MW and blade span of 38m using modified BPM noise solver.
Satya Prasad Maddula +2 more
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Turbine Blade Surface Phantom Cooling from Upstream Nozzle Trailing-Edge Ejection
Journal of Thermophysics and Heat Transfer, 2015This paper presents upstream nozzle trailing edge coolant ejection on downstream uncooled blades. Pressure sensitive paint (PSP) mass transfer technique provides detailed phantom cooling effectiveness distribution on a modeled land-based turbine rotor blade surfaces. Cavity purge and tip leakage flows are excluded, and a uniform blade inlet temperature
Shiou-Jiuan Li +4 more
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Active control system for a rotor blade trailing-edge flap
SPIE Proceedings, 2000Reducing the external noise is becoming a major issue for helicopter manufacturers. The idea beyond this goal is to reduce or even avoid the blade vortex interaction (BVI), especially during descent and flights over inhabited areas. This can be achieved by changing locally the lift of the blade.
Marc Duvernier +3 more
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Trailing Edge Erosion Prevention in Steam Turbine Last Stage Rotating Blades
Volume 10: Steam Turbine, 2023Abstract In recent years, the operational requirements for steam turbines used for heat and/or power applications have changed significantly. Especially, highly flexible operation regimes and extended operating ranges are required including frequently requested start-stop cycles and “parking” of units at low load conditions.
Norbert Sürken +2 more
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The effect of square trailing edges on turbine blade performance
27th Joint Propulsion Conference, 1991An experimental investigation was conducted on the aerodynamic performance of transonic gas turbine blades with blunt and round trailing edges. All work was performed at the recently-developed transonic cascade facility of Virginia Polytechnic Institute & State University.
J. COLLIE, H. MOSES, T. KISS
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