Understanding ice crystal accretion and shedding phenomenon in jet engines using a rig test

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DOIResolve DOI: http://doi.org/10.1115/1.4002020
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Journal titleJournal of Engineering for Gas Turbines and Power
Article number41201
SubjectAir temperature; Atmospheric ice; Aviation industry; Engine power; Ice accretion; Ice conditions; Ice crystals; Icing conditions; Level ice; Outer surface; Phase conditions; Research tools; Rig testing; Rig tests; Surface temperatures; Test results; Test rigs; Test sections; Transition ducts; Video documentation; Airfoils; Atmospheric temperature; Crystals; Freezing; Jet engines; Testing; Ice
AbstractThe aviation industry has now connected a number of engine power-loss events to the ingestion of atmospheric ice crystals. Ice crystals are believed to penetrate to and eventually accrete on surfaces in the engine core where local air temperatures are warmer than freezing. Research aimed at understanding the accretion and shedding of ice crystals within the engine is being conducted industrywide. Although this specific icing condition is readily produced inside an operating engine, rig testing is the preferred research tool because it has the advantage of good visibility of the ice accretion process and easy access for video documentation. This paper presents one of the first efforts to simulate the warm air/cold ice conditions occurring inside the engine core using a test rig. The test section contains geometry simulating the transition duct between the low and high compressors in a typical jet engine and an airfoil simulating the engine strut connecting the inner and outer surfaces. Test results showed ice formed on the airfoil and other surfaces in the test section at air temperatures warmer than freezing. However, when both the air and surface temperatures were held below freezing, the injected ice did not melt and no ice accretion was observed. Ice only formed on the airfoil when mixed-phase conditions (liquid and ice) were produced, by introducing the ice into a warm airflow. This test concludes that a rig-level ice crystal icing test is feasible and capable of producing ice accretion in a simulated engine environment. As it was the first test of its kind, reporting of these preliminary test results are expected to benefit future experimenters. Copyright © 2011 by ASME.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21271075
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Record identifier70702a59-8e0b-4823-a6e2-013946ca4388
Record created2014-03-24
Record modified2016-05-09
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