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Effects of Adverse Weather on Aerodynamics

The Fluid Dynamics Panel of AGARD sponsored a
Specialists Meeting on “Effects of Adverse Weather on
Aerodynamics" on April 29 to May 1, 1991, in Toulouse,
France. The purpose of the meeting was to provide an
update of the state-of-the art with respect to the
prediction, simulation and measurement of the effects of
icing, anti-icing fluids and various forms of precipitation on
the aerodynamic characteristics of flight vehicles. Sessions
were devoted to introductory and survey papers and icing
certification issues, to analytical and experimental
simulation of ice frost contamination and its effects on
aerodynamics, and to the effects of heavy rain and
deicing/anti-icing fluids. The 19 papers announced for the
meeting are published in AGARD Conference Proceedings
CP-496 and are listed in the Appendix of this report. A
brief synopsis of each paper and some discussion,
conclusions and recommendations are given in this
evaluation report.

The 68th Meeting of the AGARD Fluid Dynamics
Panel Specialists Meeting was held on April 29 to May 1,
1991, in Toulouse, France. Its theme, as published in the
AGARD announcement, was the following:

In recent years, a number of weather-related accidents,
along with the introduction of new types of anti-icing
fluids and apparent uncertainties in certification and
operation procedures, have stimulated renewed
research activities. Aircraft operators, the aircraft
industry, as well as research institutes and
certification authorities, are participating in such
activities.

The purpose of the Specialists’ Meeting is to provide
an update of the state-of-the-art with respect to the
prediction, simulation and measurement of the effects
of icing, anti-icing fluids and various forms of
precipitation on the aerodynamic characteristiCs of
flight vehicles and to communicate research results on
these topics that have been obtained in recent years.

The meeting agenda listed 19 papers, and all except
twa (numbers 2 and 12) were presented at the meeting.
Fortunately, the written version of paper 2 was available at

the meeting, and paper 12 was later received by the
technical evaluator. Written versions of papers 10 and 18
were not available at the meeting, but drafts of the papers
were later received by the technical evaluator. The 19
papers were published in AGARD Conference Proceedings
CP-496. The titles of the 19 contributions are listed in
Appendix A. The members of the Program Committee for
the meeting are given in Appendix B.