Transient Heat Transfer Measurements on a Flat Plate in Turbulent Flow Using an Electrical Analog
Abstract
In this study an electrical analog, for heat flux measurement from surface mounted thin film temperature gauges, was built and tested. Typically, the determination of heat transfer from thin film gauges requires the numerical evaluation of an integral. The electrical analog enables the heat transfer to be recorded directly without incorporating numerical error. Once built and tested, the analog is used to measure transient flat plate heat flux with free-stream turbulence. The time varying flow is produced using a low pressure shock tube, with free stream turbulence generated by flow injection upstream of the flat plate. The steady flow portion of the test data is compared to the theoretical flat plate solution for constant free stream and constant plate temperatures. A constant temperature hot-wire technique is used to determine free stream turbulence. The hot-wire procedure requires performing several experiments with the same flow conditions, but different hot-wire operating temperatures. Theses. (rrh)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA216286
Entities
People
- Richard K. Rockwell
Organizations
- Air Force Institute of Technology