TACTl, A Computer Program for the Transient Thermal Analysis of a Cooled Turbine Blade or Vane Equipped With a Coolant Insert II - Programmers Manual

摘要

A computer program to calculate transient and steady-state temperatures, pressures, and cool¬ant flows in a cooled axial-flow turbine blade or vane with an impingement insert is described. Coolant-side heat-transfer coefficients are calculated internally in the program, with the user specifying either impingement or convection heat transfer at each internal flow station. Spent impingement air flows in a chordwise direction and is discharged through the trailing edge and through film-cooling holes. The ability of the program to handle film cooling is limited by the internal flow model. Input to the program includes a description of the blade geometry, coolant-supply conditions, outside thermal boundary conditions, and wheel speed. The blade wall can have two layers of different materials, such as a ceramic thermal-barrier coating over a me¬tallic substrate. Program output includes the temperature at each node, the coolant pressures and flow rates, and the coolant-side heat-transfer coefficients.