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A new refrigeration solution for high by-pass ratio engines is the main objective of the Intelligent Cooling System project. This study is based on a surface integrated air-oil heat exchanger placed at the location of the air separator nose within the bypass flow of a turbofan. The aim is to help the cooling of the oil circuit without disturbing the air stream and decreasing the overall efficiency of the engine.

The present work focuses on the aerodynamic characterization of the interaction between the three dimensional bypass flow and different configurations of finned heat exchangers. This research is done in von Karman Institute in a new blowdown wind tunnel characterized by an helicoidal test section specifically design within this project in order to reproduce the engine bypass flow in the region of interest.

This report presents the work performed for the calibration and implementation of the thermocouples and hot wire anemometers used for total temperature and turbulence measurements, as well as part of the flow results, with the relative postprocessing methodology.

Finally the uncertainties analysis was done in order to estimate the goodness of the results and to identify the major sources of errors.