Prediction of rotor surface unsteady pressure and heat transfer from wake passing
Abstract
A numerical investigation of the effects of unsteady flow on gas turbine heat transfer, particularly on the rotor blade surface, is described. Unsteady flow in a rotor blade passage and the unsteady heat transfer on the blade surface as a result of wake/rotor interaction are modeled by the inviscid flow/boundary layer approach. Euler equations which govern the inviscid flow are solved using a time accurate marching scheme. Unsteady flow in the blade passage is induced by periodically moving a wake model across the passage inlet. Unsteady flow solutions in the passage provide pressure gradients and boundary conditions for boundary layer equations which govern the viscous flow adjacent to the blade surface. Turbulent flow which is transported from upstream and created within the wake is modeled by a turbulent kinetic energy/dissipation model. Numerical solutions of the unsteady turbulent boundary layer yield surface heat flux values which then can be compared to experimental data.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1991
- Bibcode:
- 1991PhDT........21T
- Keywords:
-
- Euler Equations Of Motion;
- Gas Turbines;
- Heat Transfer;
- Inviscid Flow;
- Mathematical Models;
- Pressure Distribution;
- Rotor Blades;
- Turbulent Heat Transfer;
- Unsteady Flow;
- Wakes;
- Boundary Conditions;
- Boundary Layer Equations;
- Flux Quantization;
- Heat Flux;
- Numerical Analysis;
- Pressure Gradients;
- Time Marching;
- Turbulent Boundary Layer;
- Turbulent Flow;
- Upstream;
- Viscous Flow;
- Fluid Mechanics and Heat Transfer