The Development and Validation of Simple Empirical Models of Impingement Cooling from Full Surface Heat Transfer Coefficient Distributions
Abstract
A simple heat transfer model of a cast passage impingement cooling system with film-cooling extraction is presented. This was derived from detailed local Nusselt number distributions on all surfaces of the system, measured in a large-scale model using transient liquid crystal techniques. These data were averaged over physically sensible regions correlated to local flow conditions. An energy balance technique was use to calculate the convective efficiency. A second conventional plate insert impingement passage also was investigated. Local Nusselt number distributions on the target and impingement plates were used along with correlated data to predict the overall convective efficiency, and determine the sensitivity of the prediction to the data resolution. A reduced instrumentation heat transfer test using fast response gas thermocouples mounted at the inlet and exit planes of the test section was used to assess the validity of the empirical models. (15 figures, 20 refs.)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2003
- Accession Number
- ADA419407
Entities
People
- Changmin M. Son
- David R. H. Gillespie
- Geoffrey M. Dailey
- Peter T. Ireland
Organizations
- University of Oxford