TY - JOUR
TI - Downhole heterogeneous heat transfer characteristics and rock stress distributions induced by liquid nitrogen jet
AU - Cai Chengzheng
AU - Wang Bo
AU - Feng Yinrong
AU - Gao Yanan
AU - Yang Yugui
JN - Thermal Science
PY - 2024
VL - 28
IS - 4
SP - 3429
EP - 3434
PT - Article
AB - Liquid nitrogen jet is expected to provide a new idea for the breaking of  deep dry hot rock due to its low temperature. In order to study the  characteristics of het­erogeneous temperature and stress fields during  liquid nitrogen jet impingement, the downhole flow and stress  characteristics induced by liquid nitrogen jet were studied by a  thermal-hydraulic-mechanical coupling model. The results showed that under  the same conditions, the potential core and the maximum velocity of liquid  nitrogen jet were higher than water jet. The liquid nitrogen jet had a  larger region of high turbulent kinetic energy, and the heat transfer  efficiency with the bottom rock was obviously higher than water jet.  Compared with the water jet, the liquid nitrogen jet formed a tensile stress  zone in the bottom rock. The research was expected to provide a theoretical  basis for the rock breaking mechanism of liquid nitrogen jet.