文章基本信息

标题：Numerical simulation of temperature field and temperature stress of thermal jet for water measurement
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作者：Guohua Wang ; Jun Tan ; Lingui Wang 等
期刊名称：European Journal of Remote Sensing
电子版ISSN：2279-7254
出版年度：2021
卷号：54
页码：11-20
DOI：10.1080/22797254.2020.1743956
语种：English
摘要：Thermal-jet for water Measurement spallation is a rock removal process that utilizes induced thermal stress to fracture the rock into small fragments before melting of the rock occurs. Because of the low conductivity, thermal stress will be created on the rock surface. When the thermal stress exceeds the strength of the rock, cracks will form and expand. Eventually, rocks disintegrating into small fragments. The simulation result obtained by the Crank–Nicolson method of the temperature field and the distribution of thermal stress has been analyzed. The result indicates that during thermal spallation drilling, the temperature of the surface exposed to the thermal-jet for water Measurement rises rapidly and create temperature gradients in both radial and axial directions. Because of volume expansion, the heated part is subjected to compressive stress in radial direction and shear stress in axial direction, respectively. The result is very helpful to the field application.