Abstract
This paper presents experimental study of the effects of the surface angles on the cooling rate in water spray cooling using a micro jet dispenser. The sample surface used is SUS304 cylinder with different roughness, Ra0.04 (Mirror) and 10 and is inclined at 15°, 30° and 45°. The droplet diameter and velocity are independently controlled in 500μm and 2.5m/s. The cooling curve is drawn in the range of 500℃ to 100℃ from the temperature data of the sample. The inclination of the surface decreases the cooling time both at the roughness Ra0.04 and Ra10. The increase of the cooling rate is observed at the region of transition boiling and nucleate boiling.
