Results 181 to 190 of about 32,908 (214)

Optimum Trailing Edge Ejection for Cooled Gas Turbine Blades

Journal of Turbomachinery, 1989
The effect of trailing edge ejection on the flow downstream of a cooled gas turbine blade is investigated. Parameters that affect the mixing losses and therefore the efficiency of cooled blades are the ejection velocity ratio, the cooling mass flow ratio, the slot-width ratio, and the ejection angle. For ejection velocity ratio μ = 1, the trailing edge
openaire   +1 more source

Thick Airfoils With Blunt Trailing Edge for Wind Turbine Blades

Volume 5: Industrial and Cogeneration; Microturbines and Small Turbomachinery; Oil and Gas Applications; Wind Turbine Technology, 2010
This paper addresses the primary concerns regarding the aerodynamic performance characteristics of thick airfoils with blunt trailing edges (or so-called flatback airfoils) and the utilization of these section shapes in the design of rotor blades for utility-scale wind turbines.
C. P. van Dam, A. Cooperman, A. McLennan, R. Chow, J. Baker   +4 more
openaire   +1 more source

Induced-shear piezoelectric actuators for rotor blade trailing edge flaps

Smart Materials and Structures, 2002
Much of the current rotorcraft research is focused on improving performance by reducing unwanted helicopter noise and vibration. One of the most promising active rotorcraft vibration control systems is an active trailing edge flap. In this paper, an induced-shear piezoelectric tube actuator is used in conjunction with a simple lever–cusp hinge ...
Louis R Centolanza, Edward C Smith, Brian Munsky   +2 more
openaire   +1 more source

Aeroelastic Control of Wind Turbine Blade Using Trailing-Edge Flap

Wind Engineering, 2014
A mathematic rotating blade model is introduced in conjunction with periodic time-varying aerodynamic load, which is described by Beddoes-Leishman dynamic stall model. The consequent aeroelastic model is utilized to analyze blade dynamics and design control strategy for blade flutter suppression application.
Nailu Li, Mark J. Balas
openaire   +1 more source

Aeroelastic Suppression of Wind Turbine Blade Using Trailing-Edge Flap

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Integrated System Design and Implementation, 2013
The variation of aeroelastic system dynamics is treated as the change of time-varying aerodynamic loads along the operation trajectory of a spinning wind turbine. An Adaptive Control scheme is introduced to suppress flutter based on the proposed model. The robustness and effectiveness of Adaptive Control is shown by simulation results.
Nailu Li, Mark J. Balas
openaire   +1 more source

Frequency domain system identification of helicopter blades with trailing edge flaps

Adaptive Structures Forum, 1996
In forward flight, the dynamics of a rigid flapping rotor blade, with and without a trailing edge flap, are represented by an ordinary differential equation with periodically time varying coefficients. Existing frequency domain system identification techniques were developed only for linear time invariant (LTI) systems.
Sung Hwang, Norman Wereley
openaire   +1 more source

A choice of trailing edge diameter of gas turbine blades

Thermal Engineering, 2008
A possibility of increasing the efficiency and profitability of gas-turbine installations by optimization of the geometry of trailing parts of the blades profiles is considered. This is done on the basis of actual data on characteristics of the blades of gas turbines manufactured by Western companies.
openaire   +1 more source

Failures in Trailing Edge Bondlines of Wind Turbine Blades

2011
Bonded joints in composite structures are often en object for concern. This is also true for wind turbine blades, where damage occurs in the trailing edge due to fatigue loads. Reliability of wind turbines becomes increasingly important when used offshore, where operation and maintenance costs constitute a significant part of the cost per kWh produced.
Jensen, F. M., Sørensen, John Dalsgaard, Nielsen, P. H., Berring, Peter, Flores, S.   +4 more
openaire   +1 more source

Trailing-Edge Blowing of Model Fan Blades for Wake Management

2014
Master of ...
openaire   +2 more sources

Machine learning-enabled prediction of wind turbine energy yield losses due to general blade leading edge erosion

Energy Conversion and Management, 2021
Alessio Castorrini, Aldo Bonfiglioli, Edmondo A Minisci   +2 more
exaly