Influence of Compound Lean on an Industrial Steam Turbine Stage

Abstract

Compound lean implemented on stator of an industrial steam turbine stage in order to reduce secondary losses are discussed. Baseline stator is a prismatic vane with aspect ratio of unity. Compound lean stator blade is designed by shearing the airfoil sections in tangential direction. Modifications are analyzed numerically using commercial code CFX. Three blade rows i.e. one complete stage with a downstream stator are analyzed. Steady state Reynolds averaged Navier Stokes equations are solved. Total pressure loss (TPL) is used as objective function to monitor reduction in secondary losses. Rotor is retained the same for baseline as well as compound leaned stator. Results show reduction in total pressure loss of stator in excess of 5 %. Also, computations of co-efficient of secondary kinetic energy shows significant reduction in secondary losses in excess of 30 % in stator. Efficiency gained by implementation of compound lean are discussed.

Relating Human Value Philosophy To Vedic Philosophies With Special Focus On The Concepts Of Body, Self (I) And Intellect As The Ultimate Tool In The Hands Of Human Beings.

“…Human values philosophy talks of every human being a unique combination of a body and self or 8I9. There should be co-existence within as well as in the external expression [7]. Co-existence stresses the importance of each unit in the entire existence including external & internal space.…”

“…We are spiritual beings having a human experience.= 3 Pierre Teilhard de Chardin The wise words above became the base of knowledge dissipation. If we recall the pyramid of hierarchy [7] as given by Abraham Maslow, we tend to realise the importance of self-realization. Thus imparting the spiritual knowledge is the greatest help extended to any individual.…”