Proceedings ArticleDOI
An In-Place Recalibration Technique to Extend the Temperature Capability of Capacitance-Sensing, Rotor-Blade-Tip-Clearance Measurement Systems
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TLDR
In this article, an in-place recalibration technique for rotor-blade-tip-tip clearance measurement systems was proposed to reduce the errors in a commercial system by more than 50 percent up to a temperature of 370 C (700 F).Abstract:
It is known that capacitance-sensing, rotor-blade-tip-clearance measurement systems suffer from a strong dependency on probe tip temperature and humidity. A novel in-place recalibration technique partly overcomes this problem through a simple modification of the electronics that permits a scale factor correction. The technique is used to reduce the errors in a commercial system by more than 50 percent up to a temperature of 370 C (700 F). A probe design is proposed to further raise the maximum temperature capability of the measurement system.read more
Citations
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Journal ArticleDOI
Capacitive sensor for active tip clearance control in a palm-sized gas turbine generator
TL;DR: A capacitive tip clearance measurement system, based on a synchronous detection of a phase-modulated signal, for a palm-sized gas turbine engine with an integral ceramic rotor piece, using a surface modification of the ceramic compressor and rotor with conductive coating.
Journal ArticleDOI
Blade by Blade Tip Clearance Measurement
TL;DR: A capacitance-based tip clearance measurement system which engineers have used in the most demanding turbine test applications and the method used to calibrate the measurement system in order to ascertain measurement accuracy is described.
Proceedings ArticleDOI
Design Considerations for Tip Clearance Control and Measurement on a Turbine Rainbow Rotor With Multiple Blade Tip Geometries
DissertationDOI
On the Aerothermal Flow Field in a Transonic HP Turbine Stage with a Multi-Profile LP Stator Vane
TL;DR: In this article, the authors present an experimental study of the aerodynamic properties of a single and a half turbine stage, focusing on: the aero-thermal flow in the overtip region of a transonic highly loaded high pressure (HP) rotor, and the aerodynamics and heat transfer of an innovative low pressure stator with a multi-profile configuration placed downstream of the high pressure turbine, within an s-shaped duct.
References
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In-place recalibration technique applied to a capacitance-type system for measuring rotor blade tip clearance
TL;DR: In this paper, the rotor blade tip clearance measurement system consists of a capacitance sensing probe with self contained tuning elements, a connecting coaxial cable, and remotely located electronics, and a novel inplace recalibration technique was presented which partly overcomes this problem through a simple modification of the electronics that permits a scale factor correction.
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