EXPERIMENTAL STUDY OF COOLING SPRAY METHOD ONTO INCLINED HEATED SURFACES

Single droplet impingement onto inclined heated surface is studied experimentally. Droplet in the form of aquades dropped from a fixed height 70 mm to metal with 45º impact angle. This experiment uses 3 types metals; Stainless Steel AISI 304, Aluminum Alloy 2024, and Copper. All material surfaces are mirror polished assumed have same treatment condition. Surface temperatures 110 ºC, 150 ºC 210 determine behavior characteristics. The has 3.0 diameter 28.5 Weber Number (low category). In order analyze slow motion high velocity camera 4000 fps (frames per second) used image resolution 1024 x 768. Data obtained then processed using MATLAB processing technique sequence images visually quantitatively several parameters; spreading ratio, dimensionless contact time.The results showed droplets different characteristics even at temperature. time on copper shorter than aluminum stainless steel. because experienced bouncing due film boiling regime takes place earlier. Maximum ratio stainless-steel higher changes steel slower still experiencing