Heat transfer of impinging sweeping jets

The convective heat transfer performances of sweeping jets impinging on a heated thin foil are experimentally investigated. The investigation is performed by employing the Infrared Thermography technique coupled with the Heated Thin Foil heat flux sensor. Two sweeping jet devices, characterized by different mixing chamber lengths, are employed and their heat transfer performances are evaluated for non-dimensional nozzle-to-plate distances H/D ranging between 2 and 10. Time-averaged and phase-averaged analyses have been carried out in order to characterize the heat transfer behaviour of the two sweeping jets devices highlighting the influence of the mixing chamber length on such a behaviour.