Forced convection A thin plate is suspended in air at 1 atm. with T? = 15°C....

Forced convection

A thin plate is suspended in air at 1 atm. with T? = 15°C. Air flows on both sides of the plate where the bottom side absorbs a uniform radiative heat flux of 1542 W/m2. The plate is oriented parallel to the flow and the length along the flow direction is 60 cm. Consider the plate is negligibly thin and the width of the plate (perpendicular to the flow) is large, so that the problem can be considered as a 2D problem.
1. If the temperature of the plate is not to exceed 80°C at any position, what air velocity would be required? Evaluate the air properties at 310 K. (3 pts)
2. Using the velocity calculated in part 1, find an expression for the heat transfer coefficient (h) and surface temperature (Ts) as a function of distance from the leading edge (x). Graph h and Ts for x = 1 ~ 60 cm.
3. If the length of the plate increases to 1.2 m and other conditions (including the air properties) remain the same as in parts 1 and 2, what is the surface temperature at the end of the plate? Graph h and Ts for x = 0.6 ~ 1.2 m

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samet mamat answered 1 year ago

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