1. Secondary Flows in Turbine Cascades & Consequences P M V Subbarao Professor Mechanical Engineering Department Finite Length of Blade Generates more Physical Boundaries and vorticity.……

2. Parts of A Current Turbine Rotor

3. Losses Contributed by EndWalls

4. More Geometrical Features of A Turbine Blade

5. Modular Concept of Blade Design & Construction

6. The Profile of A 3D Blade A 3D blade works along with its endwalls. Endwall flows originate from specifically developing endwall boundary layers. These are associated with the presence of longitudinal vortices with a dominant streamwise component of the vorticity. These are generally known as and secondary flows. They are driven by transverse static pressure gradients and mass forces acting on fluid elements in curvilinear motion through the blade-to-blade passage. Understanding the complex development of endwall flows is a part of betterment of blade profile !!!

7. Impact of Endwall Flows Endwall flows are also an important source of losses in turbines. More serious impact on cascades with short-height blading and high flow turning. Due to the complex nature of endwall boundary layer flows/secondary flows, the evaluation of endwall losses is not an easy task.