NDLI: A fundamental study of liquid spray evaporation at a heated surface

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A fundamental study of liquid spray evaporation at a heated surface

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wierum, F. A.
Copyright Year	1979
Description	The influence of feedwater temperature and the influence of pulsing nozzle flow on the heat transfer characteristics in the spray evaporative cooling process were investigated. A commercial water circulation heater was installed in the feedwater line between the supply reservoir and the nozzle. A pass through the heater provided water at temperatures up to 50 C at the nozzle; higher temperatures were obtained by multiple heater passes. A thermocouple installed in the water line just upstream of the nozzle provided a measure of the feedwater temperature. Initial tests were run with belljar exhaust orifice number two which provided a pressure in a range about 7mm Hg abs. The feedwater temperature was heated to a temperature of 45 C. Results indicate that for a given system operating pressure, there is an upper limit on the feedwater temperature above which the spray will flash to vapor before hitting the surface to be cooled.
File Size	257523
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19800005150
Archival Resource Key	ark:/13960/t1tf4m68h
Language	English
Publisher Date	1979-10-25
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Surface Cooling Measurement Temperature Spray Nozzles Nozzle Flow Thermocouples Evaporative Cooling Heat Transfer Heat Flux Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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