TY - JOUR
TI - Analysis on three-dimensional flow and heat transfer in a cross wavy primary surface recuperator for a microturbine system
AU - Xiaohong Gui
AU - Tie Li
AU - Shiqiang Liang
AU - Dawei Tang
AU - Dazhong Yuan
AU - Bin Lin
JN - Thermal Science
PY - 2015
VL - 19
IS - 2
SP - 489
EP - 496
PT - Article
AB - In this paper, three-dimensional periodic numerical model for fully developed  flow in a cross wavy primary surface recuperator for a microturbine system is  built. The performance of flow and heat transfer is analyzed. The fields of  flow and temperature in a gas and air channel are obtained. Different working  conditions are numerically simulated. Numerical results are compared with  experimental data concerned. Analysis results show that the flow in the gas  and air channel is anti-symmetry along the centre of channel. The flow of  fluid is fluctuant. The flow velocity of gas is much higher than that of air.  The thermal ratio of cross wavy primary surface recuperator can reach 95.2%.  The thermal ratio decreases with the improvement of gas inlet temperature.  When gas inlet temperature increases by 100 K, the thermal ratio decreases by  about 1%. The thermal ratio increases with the reduction of flow rate in the  channel. When flow rate reduces by 40%, the thermal ratio increases by about  4%. The research results can be used to guide checking the performance of a  recuperator.