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Stochastic loads on horizontal axis wind turbine blades

Creator:: Freeman, Lisa Nalani
Abstract:: The objective of this work was to develop a method for determining stochastic loads on horizontal axis wind turbine blades. Stochastic loads caused by wind turbulence are a major consideration in designing for long life, cost effective wind turbines. The rotor blades are of particular concern because the blades are...
Resource Type:: Dissertation
Full Text:: aerodynamic loads and is capable of modeling many geometries and up to 14 degrees of freedom. The wind

Numerical solutions of two-dimensional compressible flow about an airfoil

Creator:: Kelly, Mark Warburton
Resource Type:: Masters Thesis

Solutions of the two-dimensional, subsonic flow about an airfoil

Creator:: Caldwell, Allan Linwood
Resource Type:: Masters Thesis
Full Text:: extensiTe research into the effects ot the compresaibility ot air upon the flows about aerodynamic

The design and construction of a small intermittent supersonic wind tunnel

Creator:: Bithell, Robin Allan
Resource Type:: Masters Thesis
Full Text:: encountered in flieht. An aerodynamic shape en- counters varied conditions as it proresse throujh the

Electrolytic simulation of airfloil flow

Creator:: Sworakowski, Michael Thomas
Abstract:: Airfoil flow simulation tests were carried out in a 20-inch diameter double layer circular electrolytic tank. Results of the tests indicate that the tank very closely approximates ideal conditions. The double layer circular electrolytic tank is shown to generate a very large rectangular tank. Formulas were derived to show that...
Resource Type:: Masters Thesis

Linearized model for wind turbines in yaw

Creator:: Chaiyapinunt, Somsak
Abstract:: The analysis of rigid hub, three-bladed horizontal-axis, axisymmetric wind turbines in yaw is made using a linearized, four-degree-of-freedom model. The linearized equations of motion of rotor and nacelle are developed using quasi-steady blade element theory and Lagrange's equations. The yaw behavior of the system is studied from coefficients of the...
Resource Type:: Dissertation
Full Text:: ROTOR AERODYNAMICS 90 II.1 Relative Velocity 90 11.2 Aerodynamic Forces and Moments 92 11.3

The effects of pulsing and blowing ratio on a 45° inclined jet in cross flow

Creator:: Stander, Arjan
Abstract:: The effect of jet flow pulsing and blowing ratio on a jet in cross flow has been investigated. Preliminary jet flow studies were performed without cross flow and an extensive study of jet with cross flow was done for a total of nine test cases. The effect of velocities ratios...
Resource Type:: Masters Thesis

Evaluation of horizontal axis wind turbine blade loads using unsteady aerodynamics

Creator:: Hartin, John R.
Abstract:: Most existing analyses of the blade loads on horizontal axis wind turbines are conducted using linear steady-state aerodynamics, but evaluation of loads resulting from wind turbulence or gusts may not be adequate using these techniques. This study develops single-parameter approximations for both the shed wake and trailing wake components of...
Resource Type:: Dissertation
Full Text:: Aerodynamics 2 1.2 Blade Dynamics 7 1.3 References 11 CHAPTER 2, AERODYNAMIC MODELS 14 2.1 Steady State

Performance of a smart direct fire penetrator using a ram air controlled mechanism

Creator:: Chandgadkar, Siddharth Suhaschandra
Abstract:: The effectiveness of a direct fire penetrator projectile equipped with an actively controlled ram air mechanism is investigated through dynamic simulation. The ram air control mechanism consists of a rotary sleeve valve which directs air flow from an inlet at the center of the nose to side ports. The projectile...
Resource Type:: Masters Thesis
Full Text:: vs Time .................................................. 40 24. y aerodynamic force A vs Time

Lift and drag characteristics of flexible pitching and heaving wings

Creator:: Rushen, Jesse
Abstract:: There is a pressing need for Micro Air Vehicles (MAV) that are light, powerful, and efficient to perform military reconnaissance missions and search and rescue operations. These MAVs have length scales on the order of 10 cm, where traditional steady flight wing designs perform poorly. An alternative flight mechanism is...
Resource Type:: Masters Thesis
Full Text:: flapping wings. According to Mueller, “Flapping wings at small scales may offer some unique aerodynamic

ScholarsArchive@OSU

Stochastic loads on horizontal axis wind turbine blades

Numerical solutions of two-dimensional compressible flow about an airfoil

Solutions of the two-dimensional, subsonic flow about an airfoil

The design and construction of a small intermittent supersonic wind tunnel

Electrolytic simulation of airfloil flow

Linearized model for wind turbines in yaw

The effects of pulsing and blowing ratio on a 45° inclined jet in cross flow

Evaluation of horizontal axis wind turbine blade loads using unsteady aerodynamics

Performance of a smart direct fire penetrator using a ram air controlled mechanism

Lift and drag characteristics of flexible pitching and heaving wings

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