高濃度石灰・水スラリ燃料の沸騰微粒化に関する研究 : 第1報,分裂機構と微粒化特性

概要

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Highly concentrated coal-water mixture (CWM) has attracted special interest as a substitute fuel for petroleum, and various types of twin-fluid atomizers have been developed for spray combustion. However, it will not be easy to atomize CWM finely at small air/fuel ratios, because CWM is highly viscous and has the complicated properties. This study intends to apply flash-boiling atomization to the practical burner instead of twin-fluid atomizers in order to improve the spray performances. The general disintegration mechanisms and spray characteristics were investigated and compared with those of water. Flash-boiling of CWM is strongly influenced by the degree of superheat and begins at a lower superheat than that of water. Vapor bubbles are mainly generated at the interface between coal particles and water. A solid-cone type of spray is formed by flash-boiling, relatively large liquid droplets are dispersed throughout, but smaller ones almost in the center of the spray.
一般社団法人日本機械学会の論文
1988-08-25