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Forced Convection Boiling and Critical Heat Flux of Ethanol in Electrically Heated Tube Tests

By Meyer, Michael L.

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Book Id: WPLBN0004293311
Format Type: PDF eBook :
File Size:
Reproduction Date: 1998

Title: Forced Convection Boiling and Critical Heat Flux of Ethanol in Electrically Heated Tube Tests  
Author: Meyer, Michael L.
Volume: Report-Number: NAS 1.26:206152; NASA/CR-97-206152; UVA/528344/CS98/107
Language: English
Subject: Computer Programming, Safety, Specifications
Collections: Government Library Collection, Government Library Collection
Historic
Publication Date:
1998
Publisher:

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C, R. D. (1998). Forced Convection Boiling and Critical Heat Flux of Ethanol in Electrically Heated Tube Tests. Retrieved from http://kindle.worldlibrary.net/


Description
Description: Electrically heated tube tests were conducted to characterize the critical heat flux (transition from nucleate to film boiling) of subcritical ethanol flowing at conditions relevant to the design of a regeneratively cooled rocket engine thrust chamber. The coolant was SDA-3C alcohol (95 ethyl alcohol, 5 isopropyl alcohol by weight), and tests were conducted over the following ranges of conditions: pressure from 144 to 703 psia, flow velocities from 9.7 to 77 ft/s, coolant subcooling from 33 to 362 F, and critical heat fluxes up to 8.7 BTU/in(exp 2)/sec. For the data taken near 200 psia, critical heat flux was correlated as a function of the product of velocity and fluid subcooling to within /- 20. For data taken at higher pressures, an additional pressure term is needed to correlate the critical heat flux. It was also shown that at the higher test pressures and/or flow rates, exceeding the critical heat flux did not result in wall burnout. This result may significantly increase the engine heat flux design envelope for higher pressure conditions.; CASI; Nasa Publication Center: Glenn Research Center; Unclassified; No Copyright; Unlimited; Publicly available; Annual Report; Report-Number: NAS 1.26:206152; NASA/CR-97-206152; UVA/528344/CS98/107

 

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