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An Examination of the Contributions to Loss on a Transonic Turbine Blade in Cascade
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; General, 1990Experiments to measure losses of a linear cascade of transonic turbine blades are reported. Detailed measurements of the boundary layer at the rear of the suction surface of a blade and examination of wake traverse data enable the individual components of boundary layer, shock and mixing loss to be determined.
MEE, DJ +3 more
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Design of a Transonic Research Turbine Facility
44th AIAA Aerospace Sciences Meeting and Exhibit, 2006*† ‡ The design of a continuous operation transonic research turbine facility is described. The purpose of this turbine rig is to provide an environment for the development of performance enhancing flow control technologies at conditions that are similar to those in real engines.
Ruolong Ma, Scott Morris, Thomas Corke
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Off-Design Performance of a Single-Stage Transonic Turbine
Journal of Turbomachinery, 1998This paper presents results of rig testing of a transonic, single-stage turbine at off-design conditions. Mapping of the 3.4 pressure ratio, 1.9 stage loading turbine ranged from 70 through 120 percent of design speed and 75 to 125 percent of design pressure ratio.
M. Woinowsky-Krieger +3 more
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A Study of Advanced High-Loaded Transonic Turbine Airfoils
Journal of Turbomachinery, 2004The 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 +5 more
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The Limit Load of Transonic Turbine Blading
Volume 1A: General, 1974Limit 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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Investigation of the Unsteady Rotor Aerodynamics in a Transonic Turbine Stage
Journal of Turbomachinery, 2000The 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. +4 more
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Stator/rotor interaction in a transonic turbine
24th Joint Propulsion Conference, 1988This paper presents calculations of a stator/rotor interaction in a highly loaded transonic first turbine stage. Of particular interest is the propagation and reflection of shocks which originate at the trailing edge of the upstream stator. These produce a 40% variation in the lift on the rotor, which would cause structural vibrations and increased ...
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Design and Construction of a Transonic Test-Turbine Facility
Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 2000This 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
2006In 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 +2 more
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The Base Pressure Problem in Transonic Turbine Cascades
Journal of Engineering for Power, 1979Base pressure data were systematically collected at VKI during recent years on a great variety of cascades operated over a wide range of outlet March numbers. An attempt is made to correlate these data by relating the base pressure to important cascade and flow parameters.
C. H. Sieverding, M. Stanislas, J. Snoek
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