Results From Tests on a High Work Transonic Turbine for an Energy Efficient Engine
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In this article, the experimental results of the evaluation of two high work, transonic, single-stage turbines investigated under the Energy Efficient Engine (E3) Program are presented.Abstract:
The experimental results of the evaluation of two high work, transonic, single-stage turbines investigated under the Energy Efficient Engine (E3) Program are presented. The objective of the E3 program is to provide an advanced technology base for a new generation of fuel-conservative turbofan engines. A single-stage turbine required fewer cooled airfoils, a reduced number of leakage paths and no interstage seals. These advanced energy efficient engines require high engine pressure ratios resulting in high expansion ratio, transonic, turbine designs which must have high aerodynamic efficiency. The goal of the turbine program is to develop a high pressure turbine that is compatible with the overall engine design and has an uncooled efficiency of 90.8 percent.read more
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Journal ArticleDOI
Performance analysis of a transonic high-pressure turbine
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The Design and Performance of a High Work Research Turbine
TL;DR: In this paper, the authors describe the design and performance of a single-stage research turbine with a pressure ratio of 5.0, a stage loading of 2.2, and cooled stator and rotor.
Journal ArticleDOI
Off-Design Performance of a Single-Stage Transonic Turbine
TL;DR: In this paper, the authors present results of rig testing of a transonic, single-stage turbine at off-design conditions and show that expansion efficiency drops over 4 percent from 100 to 80 percent of design speed at design pressure ratio, while remaining within half a percent from 90 to 110 percent at design speed.
Proceedings ArticleDOI
The Energy Efficient Engine (E3): Advancing the State of the Art
W. B. Gardner,D. E. Gray +1 more
TL;DR: The NASA-sponsored Energy Efficient Engine (E3) Program, intended to develop and demonstrate the technology for reducing fuel consumption in future environmentally acceptable turbofan engines, is presented in this paper.