David Donjat

Infrared thermography analysis of the transient aerothermal evolution in a turbofan core compartment model

In the context of the development of an efficient coupling method which improves aerothermal unsteady simulation accuracy, ONERA has achieved experimental validations based on a standard turbofan engine configuration. The objective of the present work is to carry out a detailed investigation of the wall temperature evolution during the aerothermal transient phase in a half-scale core compartment mock-up. A phase-averaged approach using IR thermography measurements is performed according to a methodology defined during previous simple tests. A post-processing with a radiative interchange correction is also proposed.

Investigation of high density gradients flows by pulsed digital holographic interferometry

Pulsed digital holographic interferometry is developed for analyzing high density gradients encountered in transonic and supersonic flows. Three different cases are presented: free supersonic jet, unsteady wake flows around cone and spike at Mach 2.