Results 291 to 300 of about 3,387,018 (354)
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Centrifugal loads on propeller blades
International Shipbuilding Progress, 1973The prediction of loads experienced by a rotating propeller blade is of great importance in propeller design, especially in view of the recent increase in failures of propeller blades and pitch control mechanisms. In this paper, analytical expressions are derived for the forces and moments induced on a propeller blade due to uniform shaft rotation ...
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Load mitigation with twist-coupled HAWT blades
37th Aerospace Sciences Meeting and Exhibit, 1999The load mitigation prospects of a blade that twists toward feather as it bends is addressed in this paper. For this investigation, the ADAMS-WT software has been modified to include blade models with bending-twist coupling. Models of a representative rotor operating at a constant speed are developed for several values of the bending-twist coupling ...
Don Lobitz, David Laino
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An experimental assessment of lawnmower blade loading
The Journal of Strain Analysis for Engineering Design, 2006An experimental study of the loading to which a lawnmower blade is subjected during normal operation has been performed. The blade of a consumer-grade walk-behind electric lawnmower was instrumented with strain gauge bridges and strain data were collected using a slip ring assembly and personal-computer-based data acquisition system with integral ...
S Andrews, P Wild, D Strong
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Analysis of Pressure Loading on Inducer Blades
ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2011A typical inducer has a lower breakdown NPSH (net positive suction head when loss of headrise occurs) than that of centrifugal impeller. It is an axial impeller with special design features that allow pump operation under cavitation or partial cavitation condition.
Yuzhen Wu, Hao Huang
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Aerodynamic Loads on a Darrieus Rotor Blade
Journal of Fluids Engineering, 1983A free-vortex analysis of a Darrieus rotor blade in nonsteady motion has been developed. The method uses the circle theorem to map a moving airfoil into the circle plane. The wake is modeled using point vortices. Nascent vortex strength and position are determined from the Kutta condition so that the nascent vortex has the same strength as a vortex ...
R. E. Wilson +3 more
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Uncertainty Propagation in Wind Turbine Blade Loads
2020Minimizing the cost and enhancing the lifespan of wind turbines entails the optimization of the material distribution of wind turbine components (blades, tower, etc.) without compromising their structural safety. Wind turbines are often design using the IEC 61400-1 standard to provide an appropriate level of protection against damage from all hazards ...
Wilson J. Veloz +4 more
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Bladed Disk Reduction for Transient Loading Seen in Blade Tip Rubs
Volume 6: 19th International Conference on Micro- and Nanosystems (MNS); 21st International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC); 37th Conference on Mechanical Vibration and Sound (VIB); 38th Fluid Power and Motion Control Symposium (FPMC)Abstract Minimizing blade tip clearance has become a main point of interest in the optimization of gas turbine engines. As such, there has been extensive work in reducing the size of the tip clearance to the point that the blades may contact the engine casing.
Noah Broski +2 more
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The Limit Load of Transonic Turbine Blading
Volume 1A: General, 1974Limit load represents the maximum tangential velocity or blade force that can be generated within a transonic turbine blade. Its accurate prediction is therefore extremely important if the expected thermal efficiency and power output from the turbine is to be obtained. This report presents methods of calculating limit load for typical transonic turbine
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Broadband Self Noise from Loaded Fan Blades
AIAA Journal, 2004An experimental investigation and analytical modeling were conducted of the broadband self-noise radiated by an industrial cambered airfoil embedded in an homogeneous flow at low Mach number. The instrumented airfoil is placed at the exit of an open jet anechoic wind tunnel.
Michel Roger, Stéphane Moreau
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Periodic Blade Loads on Propellers in Tangential and Longitudinal Wakes
Day 1 Tue, May 26, 1981, 1981Periodic single-blade loads were measured on model propellers in inclined flow and in a single-cycle circumferentially non-uniform longitudinal velocity field. The experimental results were correlated with predictions by the following methods: 1.
R. Boswell, S. Jessup, Ki-Han Kim
semanticscholar +1 more source