| Citation: | WU Jingfeng, HOU Liang, SONG Jianyu, et al. Airworthiness certification of turbo fan engine core duct bird ingestion during climbing phase[J]. Journal of Aerospace Power, 2023, 38（4）：1017-1024 doi: 10.13224/j.cnki.jasp.20210497
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The effect of core duct bird ingestion on turbo fan engine was analyzed, the differences of damage mode and key factors between core duct bird ingestion and fan blade bird strike were determined. Core duct bird ingestion was simulated by using smooth particle hydrodynamic method to study the impact of bird ingestion location, bird ingestion velocity and fan rotor speed. The critical parameter of the most severe operating conditions for core duct bird ingestion was determined. The results showed that the center of the inlet guide vane was the most critical position which led more bird ingested. At higher bird ingestion speed and lower fan speed, the mass of the bird body slices entering the inner duct was greater. The research results support the formulation of special conditions for the core duct bird ingestion of a certain turbo fan engine. The bird ingestion test should be carried out under the conditions of the minimum fan speed at maximum climbing speed in the typical climbing stage, at the same time, the impact position of the bird used in the test should maximize the mass of the bird ingesting into the core duct.
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