Prof. Y. Bartosiewicz leads research activities about the ejection phenomenon including supersonic ejectors, two-phase ejectors and liquid jet-pumps as passive devices to improve thermo-mechanical systems.
This activity is well balanced between theoretical developments (0D, 1D models), numerical simulations (CFD, 1D), and experimental investigations (flow visualizations, thermodynamic performances) at the component scale (ejector) as well at the system scale (thermal cycles incorporating an ejector).
In particular, this includes,
- the study of physical issues such as transonic mixing,
- two-phase choked flows including metastable effects, and
- thermodynamic performances at the system scale.
The applications cover solar cooling, low-grade heat recovery, and energy effficiency for heat pumps. This research is essentially achieved through industrial and international collaborations.