Thermally Sprayed Coating-Based Heating Systems for Boundary Layer Transition Detection — An Experimental Approach

Abstract Boundary layers on surfaces will change from laminar to turbulent flow after a critical length. Due the differing heat transfer coefficients of and flow, point transition can be detected by heating surface measuring temperature thermographic imaging. Locating is crucial for aerodynamic optimization components. In this study, fiber reinforced polymer composites (FRPCs) were chosen as test substrate. Experiments conducted using flame spray process NiCrAlY coatings. Multilayered coatings consisting an aluminum bond coat, layer alumina electrical insulation, titania fabricated atmospheric plasma spraying. Free-flight tests with functionalized winglet in order assess ability thermally-sprayed elements detect location regime. The results showed that uniformly, sufficient radiation losses It was also shown at readily observable thermography.