Transient Temperature Distributions in Heat-Generating Transpiration-Cooled Tubes and Plates

1975 ◽  
Vol 97 (3) ◽  
pp. 406-410 ◽  
Author(s):  
D. M. Burch ◽  
B. A. Peavy
Keyword(s):  
Heat Transfer ◽  
Convection Heat Transfer ◽  
Internal Heat ◽  
Analytic Solutions ◽  
Internal Heat Generation ◽  
Transient Temperature ◽  
Exit Surface ◽  
Transient Temperature Distribution ◽  
Temperature Distributions ◽  
Porous Matrices

This paper investigates the transient temperature distribution in transpiration-cooled porous matrices, after sudden initiation of uniform internal heat generation. Analytic solutions are derived for the tube and plate geometries that include the effect of forced convection heat transfer at the gas-exit surface where the conventional heat-transfer coefficient is used to define the boundary condition.

Transient Temperature Distributions Within Porous Slabs Subjected to Sudden Transpiration Heating

1976 ◽  
Vol 98 (2) ◽  
pp. 221-225 ◽  
Author(s):  
D. M. Burch ◽  
R. W. Allen ◽  
B. A. Peavy
Keyword(s):  
Heat Transfer ◽  
Numerical Solutions ◽  
Response Times ◽  
Convection Heat Transfer ◽  
Packed Bed ◽  
Small Scale ◽  
Transient Temperature ◽  
Exit Surface ◽  
Transient Temperature Distribution ◽  
Wide Range

This paper investigates the transient temperature distribution within packed beds after being subjected to single blow heating. Numerical solutions are derived for the fluid and solid temperatures that include the effect of forced convection heat transfer at the fluid-exit surface. An inlet-face heat transfer coefficient is specified that includes both the effect of small scale inlet-face convective heat transfer and heat conduction in the oncoming transpirant. The boundary conditions do not require fluid or solid temperatures to be specified at the bounding surfaces. Charts are presented for predicting the response times for packed bed heat exchangers and chemical reactors covering a wide range of parameters.

Time-Dependent Transpiration Heat Transfer in Porous Cylinders

1974 ◽  
Vol 96 (2) ◽  
pp. 218-224 ◽  
Author(s):  
D. M. Burch ◽  
B. A. Peavy ◽  
R. W. Allen
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Chemical Reactor ◽  
Analytic Solutions ◽  
Transient Temperature ◽  
Transfer Coefficients ◽  
Forced Convective Heat Transfer ◽  
Heat Transfer Coefficients ◽  
Transient Temperature Distribution

This paper investigates the transient temperature distribution within transpiration-heated and -cooled porous tubes that occur after a step increase in the rate of convective heat transfer at one of the tube surfaces. Analytic solutions are presented for transpiration cooling, catalytic chemical reactor, and tubular regenerator applications. These solutions include the effect of forced convective heat transfer at both tube surfaces where conventional heat-transfer coefficients are used to define the boundary conditions.

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