An experimental investigation of blade element theory for wind turbines. Part 1. Mean flow results

1987 ◽  
Vol 25 (2) ◽  
pp. 189-206 ◽  
Author(s):  
P.D. Clausen ◽  
D.M. Piddington ◽  
D.H. Wood
Keyword(s):  
Experimental Investigation ◽  
Wind Turbines ◽  
Mean Flow ◽  
Blade Element Theory ◽  
Element Theory ◽  
Blade Element

Optimal Design of Horizontal-Axis Wind Turbines Using Blade-Element Theory and Evolutionary Computation

2002 ◽  
Vol 124 (4) ◽  
pp. 357-363 ◽  
Author(s):  
Ernesto Benini ◽  
Andrea Toffolo
Keyword(s):  
Wind Turbines ◽  
Accurate Solution ◽  
Function Optimization ◽  
Horizontal Axis ◽  
Geometrical Parameters ◽  
Multi Objective ◽  
Blade Element Theory ◽  
Horizontal Axis Wind Turbines ◽  
Element Theory ◽  
Blade Element

This paper describes a multi-objective optimization method for the design of stall-regulated horizontal-axis wind turbines. Two modules are used for this purpose: an aerodynamic model implementing the blade-element theory and a multi-objective evolutionary algorithm. The former provides a sufficiently accurate solution of the flow field around the rotor disc; the latter handles the decision variables of the optimization problem, i.e., the main geometrical parameters of the rotor configuration, and promotes function optimization. The scope of the method is to achieve the best trade-off performance between two objectives: annual energy production per square meter of wind park (to be maximized) and cost of energy (to be minimized). Examples of the best solutions found by the method are described and their performance compared with those of commercial wind turbines.

scholarly journals Aerodynamic prediction of helicopter rotor in forward flight using blade element theory

2017 ◽  
Vol 11 (2) ◽  
pp. 2711-2722
Author(s):  
M.F. Yaakub ◽  
◽  
A.A. Wahab ◽  
A. Abdullah ◽  
N.A.R. Nik Mohd ◽  
...  
Keyword(s):  
Helicopter Rotor ◽  
Forward Flight ◽  
Blade Element Theory ◽  
Element Theory ◽  
Blade Element

An Application of the Autogyro Theory to Airborne Wind Energy Extraction

2013 ◽  
Author(s):  
Sigitas Rimkus ◽  
Tuhin Das
Keyword(s):  
Energy Harvesting ◽  
Wind Energy ◽  
Wind Field ◽  
Preliminary Investigation ◽  
Energy Extraction ◽  
Blade Element Theory ◽  
Simulation Results ◽  
Element Theory ◽  
Aerodynamic Torque ◽  
Blade Element

Auto-rotation or autogyro is a well-known phenomenon where a rotor in a wind field generates significant lift while the wind induces considerable aerodynamic torque on the rotor. The principle has been studied extensively for applications in aviation. However, with recent works indicating immense, persistent, and pervasive, available wind energy at high altitudes, the principle of autogyro could potentially be exploited for energy harvesting. In this paper, we carry out a preliminary investigation on the viability of using autogyros for energy extraction. We mainly focus on one of the earliest documented works on modeling of autogyro and extend its use to explore energy harvesting. The model is based on blade element theory. We provide simulation results of the concept. Although the results are encouraging, there are various practical aspects that need to be investigated to build confidence on this approach of energy harvesting. This work aims to build a framework upon which more comprehensive research can be conducted.

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