A Study of Nucleate Boiling Heat Transfer Over a Horizontal Rotating Cylinder PDF Download
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Author: Shih-I Tang
Publisher:
ISBN:
Category :
Languages : en
Pages : 318
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Book Description
Author: Shih-I Tang
Publisher:
ISBN:
Category :
Languages : en
Pages : 318
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Book Description
Author: J. Todd McLean
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Book Description
Author: Ralph Ramon Landry
Publisher:
ISBN:
Category :
Languages : en
Pages : 127
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Book Description
Author: Douglas Clifford Bauer
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 212
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Book Description
Author: Patrick Tan
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 144
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Book Description
Author: P. J. Marto
Publisher:
ISBN:
Category : Acceleration (Mechanics)
Languages : en
Pages : 68
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Book Description
Stable boiling in a rotating cylindrical annulus with continuous through-flow of water was obtained at heat fluxes as high as 818 000 Btu/(hr)(ft^2) (2. 58 MW/m^2) at atmospheric pressure. Incipient- and nucleate -boiling heat -transfer coefficients were obtained at accelerations up to 400 g's. Measurements were made of void fractions, radial temperature profiles, and wall pressures in the boiling fluid. Convective secondary-flow cells and fluid temperature inversions were revealed. Increased fluid thicknesses increased heat-transfer coefficients, but inlet liquid subcooling had no effect. Coefficients increased with acceleration at low heat fluxes, but at high fluxes varied less than the usual data scatter.
Author: Robert Siegel
Publisher:
ISBN:
Category : Film boiling
Languages : en
Pages : 48
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Book Description
Nucleate boiling was studied experimentally from electrically heated horizontal and vertical wires (0.0197-in. diam.) in water, ethyl alcohol, and 60-percent-by-weight aqueous sucrose solution in gravity fields of 0.014 and 1.0 times Earth gravity. The fluids were at their saturation temperatures at atmospheric pressure. The gravity reduction to 0.014 times Earth gravity caused a shift of only a few degrees in the curve of heat flux as a function of the difference between surface and saturation temperatures. Film boiling of ethyl alcohol was observed at Earth gravity and at several reduced gravity fields down to 0.014 times Earth gravity. For both the horizontal and vertical orientations, the gravity field and the circumferential surface tension at the interface of the vapor film surrounding the thin wire proved to be very important for the determination of the vapor removal pattern. As gravity was reduced, the vapor film behavior for the vertical orientation approached that for the horizontal position. A motion picture film is available that illustrates the boiling behavior in reduced gravity.
Author: R. A. Rockow
Publisher:
ISBN:
Category : Fouling
Languages : en
Pages : 58
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Book Description
Author: Peter Griffith
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 38
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Author: Yih-Yun Hsu
Publisher:
ISBN:
Category : Ebullition
Languages : en
Pages : 54
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Book Description
The ebullition cycle of nucleate pool boiling from a heating strip was studied through the use of high-speed motion pictures of schlieren and shadowgraph images. The effects of bubble agitation on thermal layer and neighboring bubbles were observed. An over-all model of ebullition based upon experimental observation was proposed that included an analytical method for predicting bubble growth rate and an analysis of the factors that influence the magnitude of the waiting period (time interval between bubbles at a particular site). Thermal-layer thickness, cavity size, and area of influence of a growing bubble are considered. A film supplement is made available. (Author).
