The accretion of ice in the compression system of commercial gas turbine engines operating in high ice water content conditions is a safety issue being studied by the aviation sector. While most of the research focuses on the underlying physics of ice accretion and the meteorological conditions in which accretion can occur, a systems-level perspective on the topic lends itself to potential near-term operational improvements. This work focuses on developing an accurate and reliable algorithm for detecting the accretion of ice in the low pressure compressor of a generic 40,000 lbf thrust class engine. The algorithm uses only the two shaft speed sensors and works regardless of engine age, operating condition, and power level. In a 10,000-case Monte Carlo simulation, the detection approach was found to have excellent capability at determining ice accretion from sensor noise with detection occurring when ice blocks an average of 6.8% of the low pressure compressor area. Finally, an initial study highlights a potential mitigation strategy that uses the existing engine actuators to raise the temperature in the low pressure compressor in an effort to reduce the rate at which ice accretes.
- International Gas Turbine Institute
An Approach to Detect and Mitigate Ice Particle Accretion in Aircraft Engine Compression Systems
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May, RD, Guo, T, & Simon, DL. "An Approach to Detect and Mitigate Ice Particle Accretion in Aircraft Engine Compression Systems." Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 4: Ceramics; Concentrating Solar Power Plants; Controls, Diagnostics and Instrumentation; Education; Electric Power; Fans and Blowers. San Antonio, Texas, USA. June 3–7, 2013. V004T06A013. ASME. https://doi.org/10.1115/GT2013-95049
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