摘要
Abstract
During the natural icing test flight of an aircraft,capturing icing weather conditions,selecting optimal me-teorological conditions,and processing compliance data have been long-standing challenges.This article analyzes the background and limitations of the formation of the icing meteorological standard in Appendix C of CCAR25,and proposes a flight method for ice detection using an icing experimental research aircraft.This method includes the selection and modification of icing experimental research aircraft,detection target area determination,flight op-eration strategy,flight safety management,data processing,etc.Based on statistical analysis of detection data,the selection criteria for meteorological conditions for natural icing flight test of civil aircraft are determined.A series of data processing methods and compliance criteria for icing meteorology are standardized,including cloud gaps,liq-uid water content,total water collection rate,icing rate,icing thickness,and degree of ice shedding.Domestic ic-ing meteorological prediction algorithms are calibrated and verified,and safety control strategies and risk degrada-tion measures for natural icing flight test are explored.A large number of flight tests have shown that this method has strong versatility and significant effects.It has been successfully applied to the certification of C919 aircraft,and strongly supports the independent development of domestic icing airworthiness standards.关键词
自然结冰/飞行试验/结冰气象探测/液态水含量/中值水滴直径Key words
natural icing/flight test/ice meteorological detection/liquid water content/median water drop diame-ter分类
航空航天
