Numerical Simulation on Near Wall Fluid Temperature of Non-Isothermal Jet with Cross-Flow for Safety Injection Inclined Tube in Reactors

In order to obtain the characteristics of the near wall fluid temperature variation and distribution of non-isothermal jet with cross-flow for the safety injection（SI） inclined tube with 45°angle in reactor,the numerical simulations were carried out at the velocity ratio range from 0.87 to 40 and when the temperature differences between jet flow and main flow were 30 and 70℃.The numerical simulations were performed at 1/9-scale model using the commercial computational fluid dynamics software CFX.Based on the calculation results,the mixing function of near wall fluid in different regions of SI inclined tube was obtained.Through the comparison of the mixing function of near wall fluid in different region at 30 and 70℃temperature differences,it was discovered that the mixing function values of each measurement point at 30 and 70℃temperature differences were basically changeless,namely,the effect of the temperature difference on the mixing function of each measurement point was small.The calculation results of the mixing function agreed well with the test ones.