Analysis of flow field structure and loss of high pressure guide vane

The viscous flow field in a high-pressure gas turbine guide vane was simulated by three order accuracy GODUNOV scheme with TVD property. The results indicate that a lot of low energy flow accumulated in the hub region since the radial movement of the secondary flow. Those above result in the increase of energy loss near the hub and even increase the total energy loss. Therefore when using low aspect ratio blade during the design of high pressure guide vane, attention should be made in order to obstruct the radial movement of the secondary flow.