Lecture Title: Flight Test on the Icing of Civil Aircraft
Speaker: Chen Yong, Chief Designer of ARJ21
Mr. Chen Yong is currently as the Chief Engineer, permanent member of the Science and Technology Committee and Chief Designer of ARJ2 in COAMC, He is the leader of the field of the jet passenger aircraft technology, led has developed the first jet aircraft (ARJ21) which was putted into the commercial operation in China, to fill the gaps of jet aircraft, and established the technical system of civil aircraft, laid the technical foundation of large aircraft.
Mr. Chen won a National Science and Technology Progress award once (ranked No.1), provincial and ministerial scientific and technological progress first prize 6 times (5 ranked No.1), has been awarded the National May 1st Labor Medal, the State Council special allowance winner, one of the first group of national "Ten Thousand Plan" selected, and is the Shanghai science and technology talents, Science and Technology Innovator of the 2019, "FENG Ru Aviation Elite Award", etc.
In recent years, the global climate change has intensified, and extreme whether has occurred frequently, which has had a major impact on the safety of people’s lives and property, infrastructure, as well as traffic and transportation, especially on civil aviation transportation industry.
China has a vast territory, which is mostly mountainous and plateau area, and the temperature changes greatly across the country, so the icing phenomenon is very complex and common.
Due to the fact that aircraft icing usually has serious threat on flight safety within several minutes, icing prediction with high accuracy and icing protection with high safety and efficiency is one of key technique to achieve safe and efficient aviation transportation. Its core technique and equipment are the technical barriers and commanding heights of the world’s aviation powers.
There are several difficulties, such as the wide range of natural icing environment required by the latest airworthiness (Appendix C and O), complicated physical icing process, the difficulty to confirm safe boundary under realistic icing condition and large number of disturbing factors of icing detection. As a result, it’s difficult to predict the icing risk accurately, and the margin of safety design is too conservative, leading to a situation that the error to distinguish icing condition is relatively large. Besides, High energy consumption of anti-ice system is also a problem. In a word, all the difficulties generate a great challenge to high-efficiency anti-ice design of aircraft.
This project is the first in China to systematically develop large aircraft icing simulation tools, icing safety design and airworthiness verification in strict accordance with the requirements of the latest airworthiness requirement. After 13 years of research, it has overcome the high-precision prediction technology of aircraft cross-scale water droplet environment icing, aircraft high-efficiency icing safety design and verification technology, high-efficiency icing safety guarantee system and other key technologies. Besides, this project invented the design and verification of the high-efficiency icing safety guarantee system for large aircraft with independent intellectual property rights, and obtained the dual recognition of CAAC and FAA. To summarize, it has played an irreplaceable role in the all-weather, safe and efficient operation of large aircraft in China.