This paper is part of a study to develop robots for farming. As such power requirement to operate equipment attach to such robots become an important factor. Soil-tool interaction plays major role in power consumption, thus predicting accurately the forces which act on the blade during the farming is very important for optimal designing of farm equipment. In this paper, a finite element investi...

The rivers connecting oceans generally carry sediment due to water and soil losses in China. Additionally, the maximum concentration is 300 g/L, which much higher than that of other countries. It unknown whether seawater with sand particles will affect power tidal current turbine blades. therefore necessary study capture turbines water-sediment environment. In this study, blade was divided into...

in this paper, an optimization method for both weight and displacement of composite blades is presented. in   order to hold issues such as aerodynamics and acoustic unchanged, airfoil shape during optimization process remained constant. to achieve the ultimate goal, only blade lamination was changed. in order to achieve minimum weight for each part of the structure, the lowest layers are foreca...

1. Turbine Classification 1.1. Blade Profiles 1.2. Impulse and Reaction 2. Velocity Diagrams 2.1. General Relationships 2.2. Momentum Principle 2.2.1. Impulse Blading 2.2.2. Reaction Blading 2.3. Blade Efficiency 2.4. Energy Principle 2.4.1. Impulse Blading 2.4.2. Reaction Blading 2.5. Impulse Blading 2.6. Reaction Blading 2.7. Whirl Velocity 3. Stage Design 3.1 Number of Stages 3.1.1 Impulse B...

A wind turbine is a device that converts mechanical energy into electrical by its rotary action. In this paper, turbine’s lift and power characteristics are improved employing vortex generator as passive flow control on the surface of turbine. triangular used for study simplicity in design effective results. NACA 4418 airfoil selected conceptual BEM (Blade Element Momentum theory), geometrical ...

An operating 2-MW wind turbine has been scanned and analysed using 2D computational fluid dynamics (CFD) blade element momentum (BEM) analysis. The current work illustrates full-scale 3D CFD simulations the differences between its impact on local aerofoil vortex shedding frequency. outcome shows that despite a pressure redistribution lift change introduced by span rotation, frequency remains si...

Generating a high startup torque is critical factor for the application of small wind turbines in regions with low speed. In present study, blades turbine were designed and optimized to maximize output power torque. For this purpose, chord length twist angle considered as design variables, multi-objective optimization study was used assess optimal blade geometry. The element momentum (BEM) tech...