Consider the air-cooled combustion cylinder of Problem 3.146, but instead of imposing a uniform heat flux at the inner surface, consider conditions for which the time-averaged temperature of the combustion gases is Tg = 1100 K and the corresponding convection coefficient is hg = 150 W/m2 ∙ K. All other conditions, including the cy1inder/casing contact resistance, remain the same. Determine the heat rate per unit length of cylinder (W/m), as well as the cylinder inner temperature Ti, the interface temperatures T1,i and T1,o, and the fin base temperature Tb' Subject to the constraint that the fin gap is fixed at δ = 2 mm, assess the effect of increasing the fin thickness at the expense of reducing the number of fins.