Results 161 to 170 of about 251,736 (207)

Vibration Characteristics of a Transonic Turbine Cascade

1998
The vibration characteristics of a transonic steam turbine cascade with a thin airfoil were experimentally studied by the influence coefficient method in a linear cascade tunnel. Two types of flow field were adopted for the experiment: one in near-design condition and the other in off-design condition of low pressure ratio.
T. Watanabe, M. Aotsuka, Y. Machida
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A Study of Advanced High-Loaded Transonic Turbine Airfoils

Journal of Turbomachinery, 2004
The development of high-performance turbine airfoils has been investigated under the condition of a supersonic exit Mach number. In order to obtain a new aerodynamic design concept for a high-loaded turbine rotor blade, we employed an evolutionary algorithm for numerical optimization.
Sonoda, Toyotaka, Arima, Toshiyuki, Olhofer, Markus, Sendhoff, Bernhard, Kost, Friedrich, Gieß, Peter-Anton   +5 more
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Investigation of the Unsteady Rotor Aerodynamics in a Transonic Turbine Stage

Journal of Turbomachinery, 2000
The paper focuses on the unsteady pressure field measured around the rotor midspan profile of the VKI Brite transonic turbine stage. The understanding of the complex unsteady flow field is supported by a quasi-three-dimensional unsteady Navier–Stokes computation using a k-ω turbulence model and a modified version of the Abu-Ghannam and Shaw correlation
DENOS R., ARTS T., PANIAGUA G., MARTELLI, FRANCESCO, MICHELASSI V.   +4 more
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The Limit Load of Transonic Turbine Blading

Volume 1A: General, 1974
Limit load represents the maximum tangential velocity or blade force that can be generated within a transonic turbine blade. Its accurate prediction is therefore extremely important if the expected thermal efficiency and power output from the turbine is to be obtained. This report presents methods of calculating limit load for typical transonic turbine
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A Simple Procedure to Compute Losses in Transonic Turbines Cascades

Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 1985
The prediction of losses in transonic flow in turbines is an important step in the design of turbine stages, but at the same time requirements of simplicity and speed are needed to allow the work of designers. The paper presents a procedure developed to match this goal. It uses classical codes, experimental correlations and simple geometrical models of
MARTELLI, FRANCESCO, Boretti A. A.
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Aerodesign of a Transonic Contrarotating Turbine for a Rocket Engine

45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2009
Contra-rotating turbines offer reduced size, weight, and cooling requirements, compared to conventional co-rotating machinery. In spite of the associated mechanical complexity of, their aero-thermal performance is superior to conventional turbines not only because stator blade rows are eliminated, but also lower turning airfoils can be implemented ...
Guillermo Paniagua, Wassim Mahmoudi, Sergio Lavagnoli, Tom Verstraete, T. Benamara   +4 more
openaire   +1 more source

Heat transfer prediction on transonic turbine blades

Revue Générale de Thermique, 1997
The design and optimization of turbine blades submitted to high-temperature flows require the prediction of aerodynamic and thermal flow characteristics. A computation method for aerothermal viscous flows has been developed. The method is based on a compressible boundary layer approach. Tests were performed on turbine blade configurations.
Pascale Kulisa, Jean-Michel Fougères
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Design and Construction of a Transonic Test-Turbine Facility

Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 2000
This paper describes the design concept and construction of a continuous operating cold flow transonic test turbine facility, which is a unique combination of a 2 MW axial test turbine and a direct coupled brake compressor. To cover the losses additional air is provided through a separate electrically driven compressor station and fed into the turbine ...
J. Erhard, A. Gehrer
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Transonic Flows of BZT Fluids Through Turbine Cascades

2006
In the above, ρ is the fluid density, a the sound speed, and s the entropy. The thermodynamic region characterized by negative values of Γ is referred to as the inversion zone, and is included between the upper saturation curve and the Γ = 0 contour (called the transition line). The Fundamental Derivative Γ represents a measure of the rate of change of
CINNELLA, Paola, CONGEDO, PIETRO MARCO, LAFORGIA, Domenico   +2 more
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Analysis and Prediction of Transonic Turbine Blade Losses

Volume 1: Turbomachinery, 1991
The use of simple computational means to determine the performance of cascades of turbine blades is attractive because it can quickly and economically yield results that can be used for optimization of classes of blades. Fully viscous flow computations are not at the point where they are economical for use in a routine way, and most computational ...
C. L. S. Farn, D. K. Whirlow, S. Chen
openaire   +1 more source