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Optical tip clearance measurements for rotating disk characterization
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015An experimental study about the vibrational behaviour of two prototypes of a rotating disk by means of three optical sensors is presented. Both prototypes were assembled in a wind tunnel in order to reproduce real operation conditions. The optical sensors identified the vibration frequency and the nodal diameter of the first prototype by measuring the ...
Iker García +7 more
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Rotordynamic effects of compressor rotor-tip clearance asymmetry
AIAA Journal, 2001Rotordynamic effects caused by nonaxisymmetric rotor-tip clearance in an axial compressor stage have been analyzed. Two coupled actuator discanalyses are carried out at blade (meridional plane )andradius(radial plane ) scales. Continuity, axial, and tangential momentum equations are used to connect upstream and downstream e ows across the compressor ...
Seung Jin Song, Kil Yong Park
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Journal of Engineering for Gas Turbines and Power, 2013
This paper presents an investigation on the hot streak migration across rotor blade tip clearance in a high pressure gas turbine with different tip clearance heights. The blade geometry is taken from the first stage of GE-E3 turbine engine. Three tip clearances, 1.0%, 1.5%, and 2.5% of the blade span with a flat tip were investigated, respectively, and
Zhaofang Liu, Zhao Liu, Zhenping Feng
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This paper presents an investigation on the hot streak migration across rotor blade tip clearance in a high pressure gas turbine with different tip clearance heights. The blade geometry is taken from the first stage of GE-E3 turbine engine. Three tip clearances, 1.0%, 1.5%, and 2.5% of the blade span with a flat tip were investigated, respectively, and
Zhaofang Liu, Zhao Liu, Zhenping Feng
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Influence of Finite Tip Clearance on the Tip Flow Characteristics of Ducted Propeller
Advanced Materials Research, 2014The influence of finite tip clearances on the tip flow characteristics, as well as pressure distribution on blade surface near the tip and open water performance of ducted propeller 19A/Ka4-55 model is studied in this paper. It is discovered that tip leakage vortex (TLV for short) disappears when clearance size reduces to a certain extent (0.08% of the
Hao Liang Ni +2 more
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Turbine Blade Tip Clearance Improvement
Volume 1: Turbomachinery, 1991A recently developed non-traditional design concept addressing turbine blade tip clearance reduction to provide long-term engine performance improvement and stability is presented. The concept is based on the direct attachment of the diaphragm, which supports Stage 1 integral nozzle and tips shroud segments, to the bearing housing, thus providing a ...
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The Tip Leakage Vortex Shed from an Unsteady Tip Clearance Flow
34th AIAA Fluid Dynamics Conference and Exhibit, 2004*† ‡ , The interaction between the rotor blade tip leakage flow and inflow disturbances, such as encountered in shrouded marine propulsors, was simulated in the Virginia Tech Linear Cascade Wind Tunnel equipped with a moving endwall system. The idealized periodic inflow unsteadiness was generated using vortex generator pairs upstream of the blade row ...
Nanyaporn Intaratep +2 more
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Tip Clearance Signal Processor Development
1988Abstract : A signal processing system was designed and constructed to detect peaks of the Vatell eddy current clearance sensor signal, measure their amplitude and timing, and compute a correction for machine speed to indicate clearance and time arrival for individual blades of a turbomachine.
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New model-based method for aero-engine turbine blade tip clearance measurement
Chinese Journal of Aeronautics, 2023Hanlin Sheng
exaly