Capacitive measurement of compressor and turbine blade tip to casing running clearance
- BMW Rolls-Royce GmbH, Dahlewitz (Germany)
- Techniche Group Ltd., Coventry (United Kingdom)
It is an established fact that the efficiency of a gas turbine engine has an inverse relationship with the clearance between the rotor blades and the casing (Tip Clearance, or TC). TC is an essential measurement during the testing of development engines. While commercial TC measurement systems are available, their applicability to an engine is dictated by engine size, geometry, physical accessibility, and temperature distribution around the measurement region. This paper describes the development of a TC measurement system, based on the capacitive measurement principle, which was undertaken to satisfy the application requirements of a specific class of gas turbine engines. The requirements included a relatively long and flexible cable to route the electrical signals out of the engine. The TC measurement system was successfully used during engine testing and valuable data were obtained.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 566209
- Report Number(s):
- CONF-960608-; ISSN 0742-4795; TRN: IM9805%%10
- Journal Information:
- Journal of Engineering for Gas Turbines and Power, Vol. 119, Issue 4; Conference: 41. American Society of Mechanical Engineers (ASME) international gas turbine and aeroengine congress and exposition, Birmingham (United Kingdom), 10-13 Jun 1996; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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