Further studies in filmwise condensation of steam on horizontal finned tubes
Swensen, Keith Andrew
Marto, Paul J.
Memory, Stephen B.
MetadataShow full item record
Over the years, there has been significant variation in the filmwise steam condensation data at NOS on horizontal low0integral finned tubes. With a view to increasing the accuracy of the data, inserts were used inside the tubes to reduce inside thermal resistance; however, significant discrepancies then occurred in the calculated outside coefficient when compared to data taken without an insert. These discrepancies arose due to the data reduction technique which assumes a known inside-heat-transfer resistance and subtracts this from a measured overall resistance. If the assumed value on the inside is inaccurate, then the outside value is equally inaccurate. The present work used an instrumented smooth tube to obtain accurate inside heat-transfer correlations both with and without inserts and uses these to obtain accurate outside coefficients for a family of uninstrumented finned tubes with a view to finding an optimum fin spacing for steam condensation.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Ciftci, Huseyin (Monterey, California : Naval Postgraduate School, 1979); NPS-69-79-014Heat transfer and hydrodynamic performance of eight different geometrically enhanced tubes of different metals was determined. Results were compared to a 25.4 mm (1.0 inch) OD, smooth stainless steel tube. Steam at ...
Morgan, Steven G.; Shanks, Alan L.; MacMahan, Jamie; Reniers, Ad J.H.M.; Griesemer, Chris D.; Jarvis, Marley; Fujimura, Atsushi G. (ASLO Association for the Sciences of Limnology and Oceanography, 2017-05-09);Surf zone hydrodynamics vary along shorelines potentially affecting the delivery of larvae and zooplankton subsidies to intertidal communities, and, hence, the intensity of postsettlement interactions, growth and reproduction ...
The effects of nozzle geometry on particle size distribution in a small two dimensional rocket motor Brennan, William Dennis (Monterey, California. Naval Postgraduate School, 1989-09);Laser diffraction particle sizing was conducted at the nozzle entrance, inside the nozzle, and in the exhaust plume of a small two-dimensional rocket motor using two different metallized propellants to determine the effects ...