The effect of local gas velocity and temperature on local heat transfer to a sphere in a high-temperature jet

1973 ◽  
Vol 51 (3) ◽  
pp. 307-314 ◽  
Author(s):  
S. Katta ◽  
W. H. Gauvin
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Gas Velocity

Local Heat Transfer Coefficients for Horizontal Tube Arrays in High-Temperature Large-Particle Fluidized Beds: An Experimental Study

1986 ◽  
Vol 108 (4) ◽  
pp. 907-912 ◽  
Author(s):  
A. Goshayeshi ◽  
J. R. Welty ◽  
R. L. Adams ◽  
N. Alavizadeh
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
High Temperature ◽  
Tube Bundle ◽  
Local Heat Transfer ◽  
Horizontal Tube ◽  
Packed Bed ◽  
Local Heat ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients

An experimental study is described in which time-averaged local heat transfer coefficients were obtained for arrays of horizontal tubes immersed in a hot fluidized bed. Bed temperatures up to 1005 K were achieved. Bed particle sizes of 2.14 mm and 3.23 mm nominal diameter were employed. An array of nine tubes arranged in three horizontal rows was used. The 50.8 mm (2 in.) diameter tubes were arranged in an equilateral triangular configuration with 15.24 cm (6 in.) spacing between centers. The center tube in each of the three rows in the array was instrumented providing data for local heat flux and surface temperature at intervals of 30 deg from the bottom to the top—a total of seven sets of values for each of the center tubes. The three sets of data are representative of the heat transfer behavior of tubes at the bottom, top, and in the interior of a typical array. Data were also obtained for a single horizontal tube to compare with the results of tube bundle performance. Superficial velocities of high-temperature air ranged from the packed-bed condition through approximately twice the minimum fluidization level. Comparisons with results for a single tube in a bubbling bed indicate only slight effects on local heat transfer resulting from the presence of adjacent tubes. Tubes in the bottom, top, and interior rows also exhibited different heat transfer performance.

scholarly journals Local Heat Transfer Characteristics of Multi Jet Impingement on High Temperature Plate Surfaces

2018 ◽  
Vol 58 (1) ◽  
pp. 132-139 ◽  
Author(s):  
Bingxing Wang ◽  
Dong Lin ◽  
Bo Zhang ◽  
Lei Xiong ◽  
Zhaodong Wang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Jet Impingement ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics
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