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Nucleate Boiling Heat Transfer To Liquid Nitrogen At Atmospheric Pressure
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Book Synopsis Nucleate Boiling Heat Transfer to Liquid Nitrogen at Atmospheric Pressure by : Satish R. Parikh
Download or read book Nucleate Boiling Heat Transfer to Liquid Nitrogen at Atmospheric Pressure written by Satish R. Parikh and published by . This book was released on 1966 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The object of this investigation was to study the effect of micro-roughness, a thin layer of oil, and infra-red radiations on the cylindrical heat transfer surface of copper, in liquid nitrogen and at atmospheric pressure during nucleate boiling. An attempt was made to find any possible effect of orientation of the heat transfer element on nucleate boiling. A number of different runs were taken with different degrees of roughness, and different orientation positions. Nucleate boiling has been found to be nearly independent of the heat transfer surface roughness and of orientation while strongly dependent on the chemical nature of the surface. Extremely high temperature differences were obtained in the nucleate boiling region by application of a thin layer of oil to the heat transfer surface. Temperature gradients in both the axial direction and the radial direction were found for the surface of the heat transfer element"--Abstract, leaf iii.
Book Synopsis A Study of the Nucleate Boiling of Liquid Nitrogen, Liquid Argon, and Liquid Carbon Monoxide from Atmospheric to Near the Critical Pressure by : Craig Bauer Johler
Download or read book A Study of the Nucleate Boiling of Liquid Nitrogen, Liquid Argon, and Liquid Carbon Monoxide from Atmospheric to Near the Critical Pressure written by Craig Bauer Johler and published by . This book was released on 1969 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The nucleate boiling curves of three corresponding states liquids (nitrogen, argon, and carbon monoxide) were analyzed. Each liquid was studied at pressures ranging from atmospheric pressure to near the critical pressure. Saturated liquid boiling was conducted from cylindrical heaters in the horizontal position having diameters of 0.75 inches and lengths of three inches. Liquid nitrogen was boiled from four different gold heat transfer surfaces; argon and carbon monoxide were boiled from the same gold surface. The critical heat flux correlation of Cobb and Park was further verified by agreement with the experimental critical heat flux ratios obtained in this investigation. It was demonstrated that the critical heat flux is a function of the heat transfer surface; and that this dependence on surface conditions should be provided for in maximum heat flux correlations. Nucleate boiling curves obtained for liquid nitrogen illustrated that a change in boiling heat transfer surface affects both the slope and shape of nucleate boiling curves. The nucleate boiling of carbon monoxide was observed to show partial film boiling along with low critical heat fluxes. Measured over a wide range of reduced pressures, the liquid argon critical heat fluxes were approximately 24 percent higher than liquid nitrogen critical heat fluxes for a given surface. When compared to the critical heat fluxes of liquid carbon monoxide, the critical heat fluxes of liquid argon and liquid nitrogen averaged 176 and 130 percent larger in magnitude respectively"--Abstract, leaf ii.
Book Synopsis A study of surface and geometric effects on the nucleate boiling of liquid nitrogen and liquid argon from atmospheric to the critical pressure by : Calvin B. Cobb
Download or read book A study of surface and geometric effects on the nucleate boiling of liquid nitrogen and liquid argon from atmospheric to the critical pressure written by Calvin B. Cobb and published by . This book was released on 1967 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Minimum Film-boiling Heat Flux in Vertical Flow of Liquid Nitrogen by : Frederick F. Simon
Download or read book Minimum Film-boiling Heat Flux in Vertical Flow of Liquid Nitrogen written by Frederick F. Simon and published by . This book was released on 1968 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Transfer Coefficients as a Function of Pressure in Nucleate Boiling Liquid Nitrogen by : Byron Neal Harman
Download or read book Heat Transfer Coefficients as a Function of Pressure in Nucleate Boiling Liquid Nitrogen written by Byron Neal Harman and published by . This book was released on 1962 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Study of Nucleate Boiling in Saturated Liquid Oxygen and Nitrogen Between Subatmospheric and Thee Critical Pressures by : Philip George Kosky
Download or read book An Experimental Study of Nucleate Boiling in Saturated Liquid Oxygen and Nitrogen Between Subatmospheric and Thee Critical Pressures written by Philip George Kosky and published by . This book was released on 1963 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis HEAT TRANSFER AT "ZERO GRAVITY" by : EUGENE W. LEWIS/HERNAN MERTE, JR. JOHN A. CLARK
Download or read book HEAT TRANSFER AT "ZERO GRAVITY" written by EUGENE W. LEWIS/HERNAN MERTE, JR. JOHN A. CLARK and published by . This book was released on 1965 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Effect of Rotation on the Nucleate Boiling from a Vertical Copper Cylinder by : Ralph Ramon Landry
Download or read book A Study of the Effect of Rotation on the Nucleate Boiling from a Vertical Copper Cylinder written by Ralph Ramon Landry and published by . This book was released on 1975 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Nucleate and Film Boiling Heat Transfer from Copper Spheres by : William David Hardin
Download or read book An Investigation of Nucleate and Film Boiling Heat Transfer from Copper Spheres written by William David Hardin and published by . This book was released on 1970 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study consisted primarily of a laboratory investigation involving nucleate and film boiling heat transfer from copper spheres with saturated liquid nitrogen at atmospheric pressure. An initial study was directed towards obtaining reproducible boiling heat flux versus [delta]T curves in the nucleate boiling region from surface conditions created by single and/or multiple glass bead peenings. The variables of bead size, nozzle line operating pressure, and distance a copper surface should be placed from the nozzle outlet were checked. The results indicated that a final peening of the surface with 0.0017-0.0035 inch diameter glass beads, a nozzle line pressure of approximately 20 psig and the surface being peened placed approximately 2.0 inches from the nozzle outlet produced the most desirable surface condition. Based on the conclusions of the initial surface condition study, a series of boiling heat flux versus [delta]T curves for nucleate and film boiling were obtained from a 2.25 inch O.D. hollow copper sphere. The transient technique was used to obtain the necessary data for these curves from a machined, single peened, sandblasted and multiple repeened surface. The resulting boiling heat flux versus [delta]T curves indicated a high degree of reproducibility from the single peened and multiple glass bead repeened spherical surface. In the film boiling region, the results indicated that surface conditions affect the minimum boiling heat flux (Liedenfrost Point) and the corresponding [delta]T at which it occurs . In general, the results indicated that a peened spherical surface yields a Liedenfrost Point comparable to a polished spherical surface. A peened 0. 75 inch O.D. solid copper sphere was oscillated with peak-to-peak amplitude-to-diameter ratios (X/d) of 2.40, 5.73 and 7.33 and at frequencies from 3.0 to 10.15 cps. More than 100 percent increase in film boiling heat flux was noted over a stationary condition when the sphere was oscillated with an X/d ratio of 7. 33 and a frequency of 6.03 cps. At the two larger X/d ratios, the boiling heat flux versus [delta]T curves in the film boiling region indicated steeper curve slopes. Heat flux versus [delta]T curves in the nucleate and film boiling regions were obtained from peened 0.25, 0.125, and 0.0625 inch diameter solid copper spheres. The boiling heat flux versus [delta]T curves obtained from the spheres in the nucleate boiling region differed from those curves obtained from larger peened and polished spherical surfaces in both the magnitude of peak nucleate boiling heat flux and critical [delta]T. Accordingly, the deviation of these characteristics between the three diameter spheres indicated that the critical [delta]T decreases as the sphere diameter was decreased. The film boiling heat flux for the three spheres were found to increase as sphere diameter was decreased. In addition, the correlation equation presented by Frederking and Clark [1]* for the Nusselt number was not representative of these size spheres. Utilizing the steady state technique, boiling heat flux versus [delta]T curves in the nucleate and film boiling regions were obtained from a peened 2.25 inch O.D. hollow copper sphere with an enclosed heater. The resulting boiling heat flux versus [delta]T curves were found to be comparable to those obtained by the transient technique from the similar 2. 25 inch O.D. hollow copper sphere. *Numbers in brackets refer to listing in the Bibliography"--Abstract, pages ii-iii.
Book Synopsis Boiling Heat Transfer to Liquid Hydrogen and Nitrogen in Forced Flow by : James P. Lewis
Download or read book Boiling Heat Transfer to Liquid Hydrogen and Nitrogen in Forced Flow written by James P. Lewis and published by . This book was released on 1962 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis incipient and steady boiling of liquid nitrogen and liquid hydrogen under reduced gravity by : herman merte. jr.
Download or read book incipient and steady boiling of liquid nitrogen and liquid hydrogen under reduced gravity written by herman merte. jr. and published by . This book was released on 1970 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Inception of Nucleate Boiling with Liquid Nitrogen by : David Wright Almgren
Download or read book The Inception of Nucleate Boiling with Liquid Nitrogen written by David Wright Almgren and published by . This book was released on 1966 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Delayed inception of nucleate boiling and patchwise boiling are discussed and the significant parameters restricting the growth of a boiling patch are analytically determined to be: (1) a high nucleate boiling heat transfer coefficient; (2) a low total heat flux; (3) the absence of cavities with a trapped liquid-vapor interface outside the boiling patch; (4) an appropriate value of wall thermal conductivity; (5) a high vapor enthalpy per bubble. A qualitative agreement between theory and experiment was observed for items 1, 2, 3 and 4. A series of pool boiling tests were conducted at one atmosphere of pressure in order to develop a surface finish that would eliminate the observed temperature hysteresis at inception of boiling of liquid nitrogen. The best surface finish developed used a bi-metallic (Zm + Cu) flame spray process. The flame spray and a 0.3-micron-grit polished copper surface were tested for their nucleation properties in forced flow of liquid nitrogen. Visual observations indicated that nucleation occurred promptly on both surfaces at approximately the same wall temperature. (Author).
Book Synopsis Studies in Boiling Heat Transfer to Cryogenic Liquids by : Philip George Kosky
Download or read book Studies in Boiling Heat Transfer to Cryogenic Liquids written by Philip George Kosky and published by . This book was released on 1966 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis boiling heat transfer with cryogenic fluids at standard, fractional and near zero gravityl by : herman merte, jr, john a clark
Download or read book boiling heat transfer with cryogenic fluids at standard, fractional and near zero gravityl written by herman merte, jr, john a clark and published by . This book was released on 1963 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis TRANSIENT BOILING HEAT TRANSFER IN SATURATED LIQUID NITROGEN AND F113 AT STANDARD AND ZERO GRAVITY by : Emin Oker, Herman Merte, Jr.
Download or read book TRANSIENT BOILING HEAT TRANSFER IN SATURATED LIQUID NITROGEN AND F113 AT STANDARD AND ZERO GRAVITY written by Emin Oker, Herman Merte, Jr. and published by . This book was released on 1973 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An SEM Surface Study of Nucleate Pool Boiling Heat Transfer to Saturated Liquid Nitrogen Reduced Pressures from 0.1 to 0.9 by : David Virgil Porchey
Download or read book An SEM Surface Study of Nucleate Pool Boiling Heat Transfer to Saturated Liquid Nitrogen Reduced Pressures from 0.1 to 0.9 written by David Virgil Porchey and published by . This book was released on 1970 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study constituted an examination of both nucleate boiling and maximum heat flux characteristics of liquid nitrogen boiling from characterized surfaces. Several textures of gold plated copper surfaces were studied in addition to silver and silver oxide surfaces. Data were taken over a wide range of reduced pressures. All surfaces were examined using a Scanning Electron Microscope (SEM). Data and micrograph comparison revealed that both surface chemistry and surface roughness affect the nucleate boiling characteristics of liquid nitrogen. These effects are separated from each other showing that nucleate boiling is a function of both surface chemistry and topography. Surface roughness was found to have a significant effect on the maximum heat flux with rougher surfaces yielding higher heat flux values. The temperature difference at burnout was found to be a function of both surface chemistry and roughness. Some existing correlations for both nucleate boiling and maximum heat fluxes were examined and shown to inadequately predict the data, primarily because of inability to account for surface roughness and/or surface-fluid interaction as affected by surface chemistry. A maximum temperature difference correlation tested predicted burnout temperature differences well. The necessity to age a surface in the fluid to be boiled was found not to be a result of adsorbed gases, but probably a result of impurities acquired on the surface that must be removed. Attempts to observe hysteresis is were unsuccessful. Hysteresis was found not to be a function of adsorbed inert gases. Data indicated that one mechanism of heat transfer by nucleate boiling will not suffice for all pressures. An existing nucleate boiling correlation was modified to allow for a mechanism change and predicted the data better than other correlations tested"--Abstract, pages ii-iii.
Book Synopsis Surface Effects on Boiling Heat Transfer in Liquid Oxygen and Nitrogen by : Nirmal Chatterjee
Download or read book Surface Effects on Boiling Heat Transfer in Liquid Oxygen and Nitrogen written by Nirmal Chatterjee and published by . This book was released on 1968 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
