In: Mechanical Engineering
An AISI 1010 carbon steel plate of 1 by 1 m size and of 6 mm thickness is hung vertically after a heat treatment to 300°C uniform temperature. It is cooled by ambient air at 20°C flowing parallel to the plate in transverse direction.
a) Considering both forced and natural convection, for 8 m/s transverse air velocity, determine the rate of heat transfer from the plate and the corresponding instantaneous rate of change of the plate temperature.
b) For the transverse air velocities in 1-15 m/s range, plot the heat transfer coefficients from the plate associated with forced convection, natural convection and mixed convection on the same graph.