Numerical Simulation Based on Heat Transfer Enhancement of Supercritical Fluid in Micro-Fin Tube

With the application of supercritical fluid heat transfer equipment in industrial fields such as solar thermal power generation, chemical industry, aerospace, etc., studying characteristics micro-fin tubes has become a key theoretical basis for development low-resistance enhancement technology. In view with different fin shapes, this paper took into account thermophysical properties nitrogen under conditions and completed numerical simulation study on process 2 mm pressure. The temperature field distribution tube was analyzed, turbulent flow mechanism studied. It found that could increase exchange area, destroy boundary layer, improve coefficient. This comprehensive performance evaluation factor PEC to compare influence shapes unit. square straight about 1.22 times smooth round tube, triangular micro 1.08 tube. results suggest significantly superior than