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Numerical study on the icing hazard zone of engine intake components under anti-icing conditions.

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Title: Numerical study on the icing hazard zone of engine intake components under anti-icing conditions.
Authors: Jing, Shuliang1 (AUTHOR), Hu, Yaping1 (AUTHOR) hyp@nuaa.edu.cn, Xu, Jing1 (AUTHOR), Jiang, Yuetao1 (AUTHOR), Zheng, Weiliang1 (AUTHOR), Du, Yaxin1 (AUTHOR)
Source: Cold Regions Science & Technology. Jul2026, Vol. 248, pN.PAG-N.PAG. 1p.
Subjects: Ice prevention & control, Computer simulation, Atmospheric temperature, Altitudes
Abstract: In accordance with Clause 33.68 of the China Aeroengine Airworthiness Advisory Circular , computational cases are selected based on the icing envelope, engine operating envelope, and compressor working performance. A three-dimensional numerical simulation of hot-air anti-icing is performed on a full-loop realistic configuration model of the engine intake components, which includes the intake ducts, intake casing, struts, axial flow casing, and zero-stage guide vanes. Based on computational results regarding the effects of engine operating state, altitude, and ambient temperature on anti-icing characteristics, the icing hazard zones under anti-icing conditions are identified. The results indicate that for the studied engine intake components and their hot-air anti-icing cavity structure, three distinct icing hazard zones exist under anti-icing conditions: within the icing envelope at an altitude of 0 km, with ambient temperatures ranging from 261.15 K to 265.15 K and from 243.15 K to 248.15 K, when the engine operates at ground idle state; and in the left boundary region of the cumulus envelope, with ambient temperatures between 243.15 K and 253.15 K, when the engine operates at maximum continuous state. This research provides valuable insights for the analysis of icing critical point analysis and airworthiness certification tests of aeroengines. • The research object is the full-ring real engine intake components and its hot-air anti-icing system. • The numerical simulation of hot-air anti-icing considering the full physical process is carried out. • The computational cases are selected by considering the matching and restriction among various parameters. • Combined with the effects of engine operating state, altitude and ambient temperature, the icing hazard zone is determined. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:In accordance with Clause 33.68 of the China Aeroengine Airworthiness Advisory Circular , computational cases are selected based on the icing envelope, engine operating envelope, and compressor working performance. A three-dimensional numerical simulation of hot-air anti-icing is performed on a full-loop realistic configuration model of the engine intake components, which includes the intake ducts, intake casing, struts, axial flow casing, and zero-stage guide vanes. Based on computational results regarding the effects of engine operating state, altitude, and ambient temperature on anti-icing characteristics, the icing hazard zones under anti-icing conditions are identified. The results indicate that for the studied engine intake components and their hot-air anti-icing cavity structure, three distinct icing hazard zones exist under anti-icing conditions: within the icing envelope at an altitude of 0 km, with ambient temperatures ranging from 261.15 K to 265.15 K and from 243.15 K to 248.15 K, when the engine operates at ground idle state; and in the left boundary region of the cumulus envelope, with ambient temperatures between 243.15 K and 253.15 K, when the engine operates at maximum continuous state. This research provides valuable insights for the analysis of icing critical point analysis and airworthiness certification tests of aeroengines. • The research object is the full-ring real engine intake components and its hot-air anti-icing system. • The numerical simulation of hot-air anti-icing considering the full physical process is carried out. • The computational cases are selected by considering the matching and restriction among various parameters. • Combined with the effects of engine operating state, altitude and ambient temperature, the icing hazard zone is determined. [ABSTRACT FROM AUTHOR]
ISSN:0165232X
DOI:10.1016/j.coldregions.2026.104943