熱削孔機による岩石切削時の熱特性について

抄録

The authors have already designed many types of thermodrills, which are now used for drilling hard rocks under the sea, and also represented the equation of local heat transfer coefficient, when the fire flame jet impinges normally to rock surface.
In thermal cutting of rocks, the local heat transfer coefficient will vary with the angle between fire flame jet and the rocicsurface.
This paper reports thermal characteristics (jet flame temperature, local heat transfer coefficient, and maximum heat flow rate) of jet flame impinging obliquely on the rock surface.
Moreover, the authors examined actual thermal cutting for granite and showed that the most effective angle between fire flame jet and rock surface was rectangular.