A Review on Tip Clearance Flow and Secondary Flow Losses in Linear Turbine Cascade

Abstract

The aerodynamics of the flow in a turbine stage (stator/rotor) is rather complex and still subject of many ongoing research activities in the gas turbine community. Gas turbine have air is the most important fuel which is produce power. It is easily and freely available in nature. But in the gas turbine have many losses occurs in running condition of it. The cascade arrangement has different-different type aerodynamic losses occurring in turbine blade. In the turbine blade have occurred profile loss, annulus loss, secondary loss and tip clearance flow loss. In this all losses the tip clearance flow and secondary flow losses have major effect in the turbine efficiency. So the turbine efficiency improvement kindly depends on these losses. The knowledge of these losses provides better idea to reduce these losses. This article provides review on different studies on secondary flow and tip clearance flow losses in linear turbine cascade.