Effects of leading-edge modification on secondary flow in turbine cascades

Numerical simulations were carried out to investigate the effect of the two leading-edge modifications on the secondary flow in high-pressure turbine cascade.The results show that the fillet and certain bulb configurations could control the secondary flow in turbine cascades and reduce the aerodynamic loss.The choices of the size of the bulb configurations have a great influence on the effect of the secondary flow controlling.The fillet configurations are better than the bulb configurations for improving of the secondary flow in turbine cascades.