Film Cooling Heat Transfer with High Free Stream Turbulence.
Abstract
Heat transfer coefficients are shown as functions of downstream and transverse plate coordinates as determined experimentally for different blowing ratios near one and for levels of free stream turbulence from 1 percent to 17 percent of the free stream velocity. Heat transfer between the plate and the free stream is reduced by the film cooling at higher levels of free stream turbulence. Heat transfer is increased on the plate in the region between the film cooling jets at all levels of blowing ratio for one percent free stream turbulence. This undesirable augmentation of the heat transfer is modeled analytically and related to the axial vortices generated near the film cooling jet inlets. The strength of these vortices and the subsequent heat transfer increases are related to the blowing ratio.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 22, 1995
- Accession Number
- ADA312458
Entities
People
- David J. Pestian
- John J. Schauer
Organizations
- Wright Laboratory