Abstract
The title program can be used to investigate wind turbines and presents the following results: aerodynamic coefficients as a function of the rotation speed, blade angle and the rotor azimuth angle, the loads in the blade root and on he rotor axis as a function of time, and the dynamic performance at different control. The aerodynamic loads result from a combination of the impuls theory and the blade element theory. The equations can be solved in two ways: 1. a quadratic equation, in which the inflow angle is small and the course of the load coefficient and the resistance coefficient with the angle of incidence is assumed to be linear respectively parabolic, and 2. an iterative method, in which load coefficient and resistance coefficient are read in as tables and there is no limitation for the inflow angle. The second method will give the most realistic results, but the first method will acquire less computing time. Summation of the aerodynamic loads, the self-weight loads and centrifugal loads gives the total loads. For the blade angle control a number of general models has been developed, namely an active on/off control, a PID-control (a Proportional Integrating Differentiating control), and a user-defined control.
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Citation Formats
Schepers, J G.
GAPHAT-3: Global Analysis Program Horizontal Axis Turbines Version 3. Model description and verification; GAPHAT-3: Globaal Analyse Programma Horizontale As windTurbines (Versie 3). Modelbeschrijving en verificatie.
Netherlands: N. p.,
1991.
Web.
Schepers, J G.
GAPHAT-3: Global Analysis Program Horizontal Axis Turbines Version 3. Model description and verification; GAPHAT-3: Globaal Analyse Programma Horizontale As windTurbines (Versie 3). Modelbeschrijving en verificatie.
Netherlands.
Schepers, J G.
1991.
"GAPHAT-3: Global Analysis Program Horizontal Axis Turbines Version 3. Model description and verification; GAPHAT-3: Globaal Analyse Programma Horizontale As windTurbines (Versie 3). Modelbeschrijving en verificatie."
Netherlands.
@misc{etde_10132229,
title = {GAPHAT-3: Global Analysis Program Horizontal Axis Turbines Version 3. Model description and verification; GAPHAT-3: Globaal Analyse Programma Horizontale As windTurbines (Versie 3). Modelbeschrijving en verificatie}
author = {Schepers, J G}
abstractNote = {The title program can be used to investigate wind turbines and presents the following results: aerodynamic coefficients as a function of the rotation speed, blade angle and the rotor azimuth angle, the loads in the blade root and on he rotor axis as a function of time, and the dynamic performance at different control. The aerodynamic loads result from a combination of the impuls theory and the blade element theory. The equations can be solved in two ways: 1. a quadratic equation, in which the inflow angle is small and the course of the load coefficient and the resistance coefficient with the angle of incidence is assumed to be linear respectively parabolic, and 2. an iterative method, in which load coefficient and resistance coefficient are read in as tables and there is no limitation for the inflow angle. The second method will give the most realistic results, but the first method will acquire less computing time. Summation of the aerodynamic loads, the self-weight loads and centrifugal loads gives the total loads. For the blade angle control a number of general models has been developed, namely an active on/off control, a PID-control (a Proportional Integrating Differentiating control), and a user-defined control. The calculations of aerodynamic coefficients and blade root loads are compared with PATHAS-1 calculations. PHATAS-1 stands for Program for Horizontal Axis wind Turbine Analysis and Simulation, Volume 1. For the most cases the differences are less than 10%. For the calculation of swing force and swing moment the differences are bigger, because of the fact that the contribution of centrifugal force to the swing force and the swing moment is neglected in GAPHAT-3. 43 figs., 3 apps., 12 refs.}
place = {Netherlands}
year = {1991}
month = {Jul}
}
title = {GAPHAT-3: Global Analysis Program Horizontal Axis Turbines Version 3. Model description and verification; GAPHAT-3: Globaal Analyse Programma Horizontale As windTurbines (Versie 3). Modelbeschrijving en verificatie}
author = {Schepers, J G}
abstractNote = {The title program can be used to investigate wind turbines and presents the following results: aerodynamic coefficients as a function of the rotation speed, blade angle and the rotor azimuth angle, the loads in the blade root and on he rotor axis as a function of time, and the dynamic performance at different control. The aerodynamic loads result from a combination of the impuls theory and the blade element theory. The equations can be solved in two ways: 1. a quadratic equation, in which the inflow angle is small and the course of the load coefficient and the resistance coefficient with the angle of incidence is assumed to be linear respectively parabolic, and 2. an iterative method, in which load coefficient and resistance coefficient are read in as tables and there is no limitation for the inflow angle. The second method will give the most realistic results, but the first method will acquire less computing time. Summation of the aerodynamic loads, the self-weight loads and centrifugal loads gives the total loads. For the blade angle control a number of general models has been developed, namely an active on/off control, a PID-control (a Proportional Integrating Differentiating control), and a user-defined control. The calculations of aerodynamic coefficients and blade root loads are compared with PATHAS-1 calculations. PHATAS-1 stands for Program for Horizontal Axis wind Turbine Analysis and Simulation, Volume 1. For the most cases the differences are less than 10%. For the calculation of swing force and swing moment the differences are bigger, because of the fact that the contribution of centrifugal force to the swing force and the swing moment is neglected in GAPHAT-3. 43 figs., 3 apps., 12 refs.}
place = {Netherlands}
year = {1991}
month = {Jul}
}