Design and Operation of a Free Molecule Heat Transfer Probe
Abstract
This report describes the development of a free molecule hot wire probe unique design. When the probe is coupled with an independent measurement of number density or pitot pressure, it is capable of determining all of the flow properties at a point in a rarefied flow field. It has good spatial resolution and large dynamic range, and it is capable of obtaining measurements at densities below which some techniques, such as the electron beam, cannot be used. It can also be used to measure flow fields within nozzles which are not accessible to optical and electron beam techniques. Preliminary tests of the probe indicate its usefulness and convenience for making flow field measurements. Normalized measurements compared very favorably with those made with the pitot probe and electron beam. Continued development will be required before the probe can display its maximum utility. Heat transfer, Hot wire probe, Flow properties, Free molecule flow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA203511
Entities
People
- Frank G. Collins
Organizations
- University of Tennessee Space Institute