Square ducts with fins

Square Ducts With Thin Longitudinal Fins... 

Gangal and Aggarwala [268] have analytically obtained the/Re and NuHi for fully developed flow in a square duct with four equal internal fins, as that shown in Fig., 5.43. The fins were treated as having zero thickness and 100 percent efficiency. The results of /Re and NuHm for fully developed flow are provided in Table 5.50. 

FIGURE 5.43 A square duct with four equal longitudinal thin fins. 

A series of supplemental tests were made on chges comprised of a confined cylindrical 3/4-inch diam Tetryl pellet over which a square metal duct or tube was placed, with an oversize 1-5/8-inch diam pellet placed at each end as confinement for the shock tube then the assembly end was initiated. These tests were made to det the fragment pattern effect using the tubes with or without fins. 

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See also in sourсe #XX -- [ , ]

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