Heat transfer investigation in the junction region of circular cylinder normal to a flat plate at 90 deg location
Abstract
External heat-transfer rates were measured on a flat plate in the junction region of a circular cylinder mounted normal to the plate at a location 90 deg from the stagnation point. This configuration simulates the junction of the shroud with gas-turbine vanes. Heat-transfer results are presented for laminar, transition, and turbulent boundary layers for a Mach number of 0.14 with gas temperatures of approximately 750 deg R over a flat plate at room temperature. The measurements were made in air for a unit Reynolds number, Re/cm, range of 11,000 to 58,000. Heat-transfer measurements were conducted in the 70-ft long, 4-in. diameter shock tube. A shock-wave reflection technique was used to produce a flow Mach number of 0.14. Thin-film platinum heat gages were mounted on the flat plate and along the line of the stagnation point of the cylinder to measure the local heat flux in the junction region. The experimental heat-transfer data were correlated with the laminar and turbulent boundary-layer theories for the flat plate. With the cylinder the heat fluxes on the flat plate were greatly increased in the junction region compared to the heat flux for the plate alone.
- Publication:
-
American Society of Mechanical Engineers
- Pub Date:
- December 1984
- Bibcode:
- 1984asme.meetU....N
- Keywords:
-
- Circular Cylinders;
- Flat Plates;
- Heat Flux;
- Heat Transfer;
- Shock Wave Interaction;
- Turbine Blades;
- Boundary Layer Flow;
- Gas Turbine Engines;
- Laminar Flow;
- Mach Number;
- Nusselt Number;
- Reynolds Number;
- Shock Tubes;
- Thermal Conductivity;
- Turbulent Flow;
- Fluid Mechanics and Heat Transfer