Publicado 4 números por año
ISSN Imprimir: 1065-3090
ISSN En Línea: 1940-4336
Indexed in
NUMERICAL VISUALIZATION OF BLADE TIP LEAKAGE FLOW
SINOPSIS
Tip leakage flows are a source of aerodynamic inefficiency and high thermal loading near blade tips. This work simulates the complex streamwise vortical structure a turbine shroud with blade tip clearance for the stationary linear cascade. Compressible Navier−Stokes equations are solved by the control volume method with the upwind Roe's scheme and the total variation diminishing (TVD) scheme. The code is validated by selecting a model of the VKI rotor to simulate the developing boundary-layer flow structure. Numerical results closely correspond to experimental data. The general attributes of the physical aspects of the tip leakage flow are successfully simulated. Results of this study demonstrate that the temperature load of the region near-tip clearance is larger than both the hub and mid-span areas over the blade, indicating that the tip leakage flow has a significant heat transfer effect on the blade tip platform and the suction side near-tip region.