Canada, October 12, 2021

This condensed online course will show how modern fully 3D in-
flight icing analyses are based on highly verified and
validated physical models, as opposed to legacy 2D and 2.5D
codes that are simply calibrated against icing tunnel data.
The course will link in a unique fashion causes, effects,
analysis methodologies, ice protection systems design, type
certification rules and workflow, and lessons learned.

Description:

  

For an aircraft, rotorcraft or jet engine to obtain a type   

design certification, it must be demonstrated that it can   

sustain safe flight into known or inadvertent icing   

conditions. The icing certification process involves CFD   

(Computational Fluid Dynamics) analyses, wind and icing tunnel   

testing (EFD: Experimental Fluid Dynamics), all considered   

“simulation”, and final demonstration of compliance through   

Flight Testing in Natural Icing (FFD: Flight Fluid Dynamics).   

Modern 3D CFD-Icing methods such as FENSAP-ICE, working as a   

direct extension of CFD-Aero technologies, have become an   

indispensable, if not a primary tool, in the certification   

process. They are rapidly replacing 2D and 2.5D methods   

(airfoils don’t fly; aircraft do). They enable analyzing the   

aircraft (fuselage, wing, engines, nacelles, cockpit windows,   

sensors, probes, etc.) as a system and not as an assemblage of   

isolated components. The judicial integration of CFD-EFD   

simulation tools provides a cost-effective aid-to-design-and-  

to-certification, when made part of a well-structured   

compliance plan. CbA (Certification-by-Analysis) being a   

current “hot” subject; this course puts it into real practice,   

providing efficient tools and showing examples of capabilities   

and limitations.  

  

The course will show how modern 3D icing codes are based on   

highly validated physical models (Scientific VVV) as opposed   

to a Catch-22 calibration of codes against icing tunnels to   

yield heuristic models. The course will also show how Reduced   

Order Models can make fully-3D calculations inexpensive   

(yielding 3D CFD with 10-20 million points + impingement +   

icing + performance in 1/100th of a second, after the   

calculation of an appropriate number of “snapshots”: this is   

even faster than 2D panel methods calibrated codes!) and   

enable rapid identification of aerodynamic and thermodynamic   

critical points in a structured way and not a heuristic one.  

 By inclusion of icing requirements at the aerodynamic design   

stage, a more comprehensive exploration of the combined   

aerodynamics/icing envelopes, optimized IPS design, and   

focused/reduced wind tunnels, icing tunnels and flight tests.   

The end result is a faster design, faster testing, faster   

natural icing campaign, and a safer aircraft that is easier to   

certificate.   

  

This course is structured to be of equal interest to   

aerodynamicists, icing, environmental systems and flight   

simulation engineers, regulators and Designated Engineering   

Representatives. Detailed knowledge of CFD is not necessary.  

   

The lectures cover the major aspects of in-flight icing   

simulation, ice protection systems, handling quality issues.   

The instructors bring an amalgam of knowledge, as scientists   

who have produced codes in current use and engineers with   

certification experience, along with cost-effective simulation   

methods widely used internationally for certification of   

aircraft for flight into known icing.