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  • December 2025

    This image shows the internal construction of the "Motive nozzle", a crucial component of the two-phase ejector, which is widely used in refrigeration and air conditioning applications. This motive nozzle is typically a converging-diverging nozzle through which a high-pressure fluid expands, and upon expansion, a very high velocity (often sonic or supersonic speed) is achieved at the motive nozzle outlet. This part, along with other ejector components, is used to improve system performance in HVAC&R systems. This image was produced using the "North Star Imaging X5000 2D Digital Radiography and 3D Computed Tomography", and implementing the vortex scan technique. This image shows the exterior (left) and interior (right) detail geometry for the motive nozzle, which would provide valuable insights into the dimensional variations for manufacturing these components and how these dimensional variations influence the HVAC&R system performance.

     

    Author: Md Muntasir Alam - Energy Transport Research Lab, MechSE