Transient Film Boiling on a Horizontal Cylindrical Surface in a Subcooled Liquid PDF Download

Author: Howard Hong-Yuang Yen
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 186

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Author: Donald R. Pitts
Publisher:
ISBN:
Category : Liquids
Languages : en
Pages : 258

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Author: Thomas Woodrow Jackson
Publisher:
ISBN:
Category : Ebullition
Languages : en
Pages : 8

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Author: David Paul Wehmeyer
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 354

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Author: Laung-Kuang Toby Wu
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ISBN:
Category :
Languages : en
Pages : 398

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Author:
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Category : Aeronautics
Languages : en
Pages : 1040

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Author: H. R. Nagendra
Publisher:
ISBN:
Category : Aerodynamic measurements
Languages : en
Pages : 52

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An approach for the solution of transient-forced convection film boiling on an isothermal flat plate using the boundary layer model is developed. The similarity variables are used to convert the governing partial differential equations to ordinary ones. The results of numerical solutions of these ordinary equations indicate that the transient process can be classified as one-dimensional conduction, intermediate, and the steady state regions. The time required for the one-dimensional conduction and the time necessary to attain a steady state condition are obtained. The influence of interfacial shear is seen to be negligible while the Prandtl Number and the ratio (C sub p delta T divided by h sub fg times Pr) have major influence. The use of local similarity approximations for the intermediate regime facilitates prediction of complete boundary layer growth. Using the ratio of time at any instant to the steady state time as abscissa, the curves representing the boundary layer growth can be merged into a single mean curve within 5 percent. Further, the analysis shows that the average rate of heat transfer during transient is 50 to 100 percent higher than those at steady state. The average rate of vapor convected away is 10 to 15 percent lower than at steady state while the average rate of accumulation to form the vapor layer is 1 to 14 times larger. Further, the total heat transferred during transient increases and the evaporation decreases for increasing values of C sub p delta T divided by h sub fg times Pr.

Author: LeRoy Alton Bromley
Publisher:
ISBN:
Category : Ebullition
Languages : en
Pages : 40

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Author:
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 504

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Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 568

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