| Lamilloy is considered as a new type of cooling ways which can meet the high cooling effectiveness with low cooling air consumption. It is comprised of internal impingement cooling, convective cooling and hot-side film cooling. Because the way has a promising potential of application, it is becoming more and more popular.Experiment, numerical simulation and engineering calculation are used to investigate the flow, heat transfer and overall cooling efficient of lamilloy.In the experiment 6 different structural lamilloy experimental items are designed, Oil—film visualization technique is used to investigate the flow of every lamilloy item. The result shows that the flow inside the lamilloy varied when the structure is different from one to another, and the changes are mainly close-by the area of pin-fin. In order to compare with the experimental results, the calculating model established in the same size as the realistic model. The calculating result illustrate that the calculating results are accord with the experimental results in general for the lamilloy flow. The heat transfer coefficient of the internal surface of impingement hole and film hole are larger, and that of the impingement surface is the smallest. The heat transfer coefficient of pin-fin surface is closely related with the flow style.Lamilloy cooling structure is applied to the turbine blades of aero turbine in the engineering calculation. The standard FORTRAN 77 program is used to calculate the temperature field both stable and unstable conditions for the blades. It also calculated the temperature field of different structure of lamilloy blade, and analyzed the influence on the temperature field of impingement hole and pin-fin hole geometrical parameter in steady condition. It also analyzed the principle of temperature field of blade varied with time in unstable condition.
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