To investigate the endwall losses control in turbine by leading edge fillet based on teardrop curves

and to study the control mechanism of sencondary flow losses in turbine by leading edge fillet based on teardrop curve

the investigation was carried out with the well-known T106 cascade which was developed for highly loaded low pressure turbines. The effect of design parameters of different leading edge fillet of turbine endwall on endwall losses control in burbine was compared and analyzed. The results show that total pressure loss coefficient is obviously affected by extension length of leading edge fillet

extension location of on suction side and pressure side. The best configuration shows a reduction of total pressure loss coefficient of T106 cascade by about 5.1%. Moreover

compared with the leading edge fillet by cosine curves

the modification based on teardrop curves do not show much more reduction to endwall losses

but the latter obtain smooth connection with the original profile which causes no blades surface pressure fluctuation locally.