Approximate Analysis of Heat Transfer in Transpired Boundary Layers at Limiting Prandtl Numbers PDF Download
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Author: Tse-Fou Zien
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 48
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Book Description
A simple procedure is developed for approximate calculations of wall heat-transfer rates in transpired boundary layers. Applications of this procedure are illustrated by various examples of incompressible, laminar flows in the limits of large and small Prandtl numbers. A distinguished limit of large Prandtl number and small mass-transfer rate is easily identified, and some limiting solutions are presented for the porous-plate configuration. Calculations for the cases with small Prandtl numbers explicitly demonstrate the usefulness of the method in studying transient heat-conduction problems. The remarkable combination of accuracy and simplicity represents the principal merit of the method. (Author).
Author: Tse-Fou Zien
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 48
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Book Description
A simple procedure is developed for approximate calculations of wall heat-transfer rates in transpired boundary layers. Applications of this procedure are illustrated by various examples of incompressible, laminar flows in the limits of large and small Prandtl numbers. A distinguished limit of large Prandtl number and small mass-transfer rate is easily identified, and some limiting solutions are presented for the porous-plate configuration. Calculations for the cases with small Prandtl numbers explicitly demonstrate the usefulness of the method in studying transient heat-conduction problems. The remarkable combination of accuracy and simplicity represents the principal merit of the method. (Author).
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Category : Aeronautics
Languages : en
Pages : 978
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ISBN:
Category : Science
Languages : en
Pages : 1208
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Author:
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ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 628
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Author: Tse-Fou Zien
Publisher:
ISBN:
Category : Ablation (Aerothermodynamics)
Languages : en
Pages : 56
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An approximate method for studying transient heat-conduction problems is presented. Its application to various linear problems and nonlinear problems involving phase transitions is described by means of several idealized problems. The method is basically a refined version of the well-known Karman-Pohlhausen integral technique in boundary-layer theory, and represents a further development of the basic ideas previously exploited to calculate skin friction and heat transfer in boundary-layer flows. The approximate solutions obtained are extensively compared with existing exact solutions and those of the classical Karman-Pohlhausen method. From the simplicity and accuracy of the present method as demonstrated in the results, the potential utility of the method in providing simple, engineering solutions to complex aerodynamic heating problems can be inferred.
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Category : Chemical engineering
Languages : en
Pages : 608
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Author: Tse-Fou Zien
Publisher:
ISBN:
Category : Equations of motion
Languages : en
Pages : 96
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An approximate method of calculating the surface heat transfer in a transpired boundary layer is presented. The method is based on an idea for refining the momentum integral technique. A semi-infinite, isothermal flat plate with uniform surface mass flux is used to demonstrate the method. The flow is assumed to be laminar. Results are presented for both incompressible and compressible boundary layers, and comparisons are made with numerical solutions or other approximate results. The findings are indicative of the potential of the method for development into an efficient tool for studying boundary-layer flows of a more complex nature. (Author Modified Abstract).
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Category : Technology
Languages : en
Pages : 966
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ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 900
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Category : Government publications
Languages : en
Pages : 1262
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