To enhance the spray flash evaporation occurring in a superheated liquid jet ejected from a tubular nozzle into a low-pressure vapor zone, a piece of wire mesh is installed at the nozzle exit. Cavitation occurs on the surface of the wire mesh and the nucleated bubbles are supplied to the liquid jet as bubble nuclei. The experimental results confirm that the spray flash evaporation is enhanced by installation of the wire mesh, thereby increasing the evaporation efficiency. Consequently, the spray flash evaporation technique can be applied to various energy-saving systems utilizing a small temperature difference at comparatively low temperatures.