冷媒中を上昇する不溶性油滴の凝固特性(熱工学,内燃機関,動力など)

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Present paper deals with experiments of direct-contact freezing of Hexadecane particles injected into stagnant pure water, ethylene glycol 30 wt% water solution and ethylene glycol 50 wt% water solution. The experimental parameters were varied in the ranges of 22.4<Re_p<492, 1860<Ar<168000, 8.79<Pr<49.9, 0.0475<Ste<0.0741 and 0.0566<Fo<1.66. Main results obtained are summarized in the followings, (1) We investigated the main features of shape, diameter, starting position of solidification of Hexadecane particles, and the variations of rising velocity in the vertical direction and solidification mass fraction. These main features are different in three injection regions that are classified mainly by injection rate of Hexadecane, (2) We proposed dimensionless correlations for the terminal rising velocity of particles, and (3) We proposed dimensionless correlations for the solidification mass fraction based on the standpoint that the cooling process and solidification process are treated separately.
一般社団法人日本機械学会の論文
2004-03-25