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Systems-Level Perspective on Engine Ice Accretion.
| 题名： | Systems-Level Perspective on Engine Ice Accretion. |
| 作者： | Guo, T. H.; May, R. D.; Simon, D. L. |
| 关键词： | Actuators; Algorithms; Compressors; Countermeasures; Detection; Gas Turbine Engines; Ice; Ice Formation; Low Pressure; Moisture Content; Monte Carlo Method; Shafts(machine Elements); Speed Indicators |
| 摘要： | 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. |
| 报告类型： | 科技报告 |
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