Wood, Richard D. (1959) An Experimental Investigation of Hypersonic Stagnation Temperature Problems. Hypersonic Research Project Memorandum, 50. California Institute of Technology , Pasadena, CA. (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20151030-161008298
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Abstract
An experimental investigation of single-shielded hypersonic stagnation temperature probes was conducted in the GALCIT Leg No. 1 hypersonic wind tunnel and in the Jet Propulsion Laboratory 12-inch supersonic wind tunnel. By the combined use of both shield and base heating, a probe recovery factor of r = 1.0 was obtained over a range of Reynolds numbers at M_∞ = 5.75. By using the experimental data and simple heat balance equations, the probe losses, for the conditions investigated, were found to be in the proportion: shield conduction loss - 15 base conduction loss - 3 thermocouple conduction loss - 1 thermocouple radiation loss - 3/100 The typical decrease in probe recovery factor observed for decreasing Reynolds number appears to be related to a decrease in the base temperature and not to the wire conduction loss as commonly assumed. An optimum probe vent to entrance area ratio of A_v/A_e ≈ 1/2 was found and is shown to be a function of the number of vent holes used in the shield. No single calibration parameter was found that could relate the experimental recovery factors under all conditions.
Item Type: | Report or Paper (Technical Report) | ||||
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Additional Information: | Army Ordnance Contract No. DA-04-495-Ord-19. Army Project No. 6b0306004 Ordnance Project No. TB3-0118 OOR Project No. 1600-PE. | ||||
Group: | Hypersonic Research Project | ||||
Funders: |
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Series Name: | Hypersonic Research Project Memorandum | ||||
Issue or Number: | 50 | ||||
Record Number: | CaltechAUTHORS:20151030-161008298 | ||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20151030-161008298 | ||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||
ID Code: | 61757 | ||||
Collection: | CaltechAUTHORS | ||||
Deposited By: | Kristin Buxton | ||||
Deposited On: | 02 Nov 2015 21:19 | ||||
Last Modified: | 03 Oct 2019 09:11 |
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