Photoelastic Investigation of Turbine Rotor Blade Shrouds

  • U. Chandrasekhar Gas Turbine Research Establishment, Bangalore
  • D. Gururaj Gas Turbine Research Establishment, Bangalore
  • K. Ramachandra Gas Turbine Research Establishment, Bangalore
  • R. Padmanabhan Gas Turbine Research Establishment, Bangalore
Keywords: Photoelastic stress analysis, Gas turbine

Abstract

This paper deals with the photoelastic stress analysis carried out to investigate the premature failure of low pressure turbine rotor blade shrouds of an experimental gas turbine. Stress distribution at the shroud aerofoil interface was studied for the original rectangular shroud geometry by stress freezing the photoelastic model blades under rotating conditions. The combined influence of taper shroud geometry and larger fillet radius in mitigating the shroud stress is studied by the three dimensional photoelastic technique and an optimised shroud geometry subject to the stress requirements of blade material is suggested.

Author Biographies

U. Chandrasekhar, Gas Turbine Research Establishment, Bangalore
Gas Turbine Research Establishment, Bangalore - 560 093
D. Gururaj, Gas Turbine Research Establishment, Bangalore
Gas Turbine Research Establishment, Bangalore - 560 093
K. Ramachandra, Gas Turbine Research Establishment, Bangalore
Gas Turbine Research Establishment, Bangalore - 560 093
R. Padmanabhan, Gas Turbine Research Establishment, Bangalore
Gas Turbine Research Establishment, Bangalore - 560 093
Published
2014-01-13
How to Cite
ChandrasekharU., GururajD., RamachandraK., & PadmanabhanR. (2014). Photoelastic Investigation of Turbine Rotor Blade Shrouds. Defence Science Journal, 38(4), 431-438. https://doi.org/10.14429/dsj.38.5873
Section
General Papers

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