Analogy performance of flow and heat transfer on the V groove surface

The drag and heat transfer characteristics of small longitudinal V groove surfaces in the rectangular channel were investigated experimentally based on the Reynold analogy. Within the range of Reynolds number from 10 000 to 80 000, the experimental results indicated that the V groove surface of h=s=0.5mm had drag-reduction characteristics,and the heat transfer of the V groove surface also be weakened, which demonstrates the correctness of the theory of Reynold analogy. The weakeness of heat transfer and drag-reduction decreased as Reynolds number increased. The decrease of heat transfer and drag-reduction contributed to the improvement of performance of aircraft engine, which will be beneficial to the flow and heat transfer when this type of surface applys to the surface of turbine vane.