Open AccessOn the Thermal Stresses Generated in Cylindrical Shells With Application to Gas Turbine Combustors
Author(s) -
H. A. Nied
Publication year - 1982
Language(s) - English
Resource type - Conference proceedings
DOI - 10.1115/82-gt-310
Subject(s) - axial symmetry , materials science , rotational symmetry , combustor , mechanics , thermal , gas turbines , thermal expansion , shell (structure) , bending , shear (geology) , combustion , composite material , structural engineering , physics , thermodynamics , mechanical engineering , engineering , chemistry , organic chemistry
The thermal stresses generated in a cylindrical shell due to axisymmetric temperature fields, which vary in the longitudinal direction, are examined by using an influence function formulation. Closed form solutions for the longitudinal, hoop and shear stresses are derived for any axially varying temperature distribution expressible by a Fourier expansion. The thermal stresses generated in a typical cylindrical gas turbine combustor cooled by periodically spaced circumferential bands of cooling holes are investigated using the derived solutions. It is shown that a critical pitch in the cooling hole spacing can create high bending stresses at the cooling holes which could contribute to thermal fatigue failure.
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