Abstract: Conjugate numerical simulation of fluid and solid zones is carried out with FLUENT software for seven different lamilloy configurations. Arrays of pin-fins、impinging holes and film holes and different parameters of pin-fins, such as the stuff ration are studied to reveal the overall cooling efficient and pressure loss coefficient. The results show that good structure of lamilloy with higher cooling efficiency and lower pressure loss coefficient is the structure with long-diamond impinging jet holes array and long–shuttle pin-fins array. With the same flux of cooling air, the pressure loss of different structures of lamilloy is almost the same. The second flow going through film holes brights higher pressure loss. Increasing the amount of pin-fins or increasing the size of diameter could bring the increasing of pressure loss and cooling efficient, which is one way of heat transfer strengthen.

Key words: Cooling efficiency, Lamilloy, Numerical simulation, Pressure loss, Stuff ratio