E102 表面性状を変化させた高温面に衝突する微小液滴の熱伝達に関する研究(OS1&9 マイクロエネルギー変換・熱・流動(マイクロ))

概要

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The present study investigates experimentally the effects of the droplet diameter, its velocity and the surface roughness on the behavior of droplet impinging onto the hot surface. Cylindrical blocks made of SUS304 with different roughness, Ra0.04, 0.2, 3, 10 were used. The droplet diameter and velocity were independently controlled in ranges of 300-700μm and 1.0-4.0m/s, respectively. The cooling curve is drawn in the range of surface temperature from 500℃ to room temperature. The experimental results show that the cooling time decreases with increase roughness. In the case of quantity of water uniformity, a cooling rate becomes fast so that droplet diameter becomes small. It was demanded the number of We number and relations of the cooling time. A cooling time is the earliest with number of Weber around 50.
一般社団法人日本機械学会の論文
2011-06-22