Repeat the calculations of Prob. 1552 for several angles of attack of the heating
Chapter 15, Problem 15-53(choose chapter or problem)
Repeat the calculations of Prob. 1552 for several angles of attack of the heating elements, from 0 (horizontal) to 908 (vertical). Use identical inlet conditions and wall conditions for each case. Note that the second stage of heating elements should always be set to an angle of attack that is the negative of that of the first stage. Which angle of attack provides the most heat transfer to the air? Specifically, which angle of attack yields the highest average outlet temperature? Is this the same angle as calculated for the single-stage heat exchanger of Prob. 1551? Discuss.
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