ABSTRACT
Problems and solutions presented in this chapter are typically found gas turbine secondary air flow systems, which are important for cooling and sealing of various critical components subjected to high temperatures. They include finding changes in pressure and temperature in isentropic compressible free and forced vortex flows and a nonisentropic generalized vortex; finding static pressure variation in a radially outward flow in rotating constant- and variable-area ducts; analyzing impingement air cooling of a cylindrical surface with a rotary arm with three jets; calculating axial thrust of a centrifugal air compressor rotor; calculating heat transfer in a rotating duct of arbitrary cross section; calculating windage temperature rise in a rotor-stator cavity; analyzing a two-tooth labyrinth two-tooth labyrinth seal under various operating conditions; and calculating pressure and temperature changes in rotating radial pipes carrying compressor bleed air flow for turbine cooling. For a deeper understanding of various concepts used in these problems and their solutions, readers are encouraged to review these concepts in Gas Turbines: Internal Flow Systems Modeling (Cambridge Aerospace Series #44, 2019) by Bijay K. Sultanian.
