Thermal analysis of anti-icing systems in aeronautical velocity sensors and structures (original) (raw)

This work reviews theoretical-experimental studies undertaken at COPPE/UFRJ on conjugated heat transfer problems associated with the transient thermal behavior of heated aeronautical Pitot tubes and wing sections with anti-icing systems. One of the main objectives is to demonstrate the importance of accounting for the conduction-convection conjugation in more complex models that attempt to predict the thermal behavior of the anti-icing system under adverse atmospheric conditions. The experimental analysis includes flight tests validation of a Pitot tube thermal behavior with the military aircraft A4 Skyhawk (Brazilian Navy) and wind tunnel runs (INMETRO and NIDF/COPPE/UFRJ, both in Brazil), including the measurement of spatial and temporal variations of surface temperatures along the probe through infrared thermography. The theoretical analysis first involves the proposition of an improved lumped-differential model for heat This work is dedicated to the 228 victims of the AF447 flight and their families. This hard lesson will hopefully affect somehow technology development protocols, in a progressively more competitive world, reminding us all that there is no acceptable, sustainable, and safe technological development without a supporting extensive scientific analysis.