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Problem 7.019 Steel (AISI 1010) plates of thickness δ 18 mm and length L-1 m on...
7.24 Steel (AISI 1010) plates of thickness δ-6mm and length L 1 m on a side...
7.24 Steel (AISI 1010) plates of thickness δ-6mm and length L 1 m on a side are conveyed from a heat treatment process and are concurrently cooled by atmospheric air of velocity u e-10 m/s and To = 20°C in parallel flow over the plates Conveyor Ti Air T For an initial plate temperature of T 300°C, what is the rate of heat transfer from the plate? What is the cor- responding rate of change of the plate temperature? The...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at a temperature of 70°C, and both sides of the plate are suddenly exposed to a convection environment at 20°C with the heat transfer coefficient of h= 800 W/m 2 oC. What will be the center and surface temperatures of the plate after 10 s? For stainless steel (AISI 316), α = 348x10-6 m2/s and k = 13.4 W/m K.
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is...
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is maintained at 250 C. The fin has a length of 150mm, a thickness of 25mm and a width w. Argon at 20 C blows over the fin giving a convective heat transfer coefficient of 25 W/m-K. Calculate heat transfer rate per unit width using the graphical method and checking the answer with the appropriate equation.
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is...
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is maintained at 250 C. The fin has a length of 150mm, a thickness of 25mm and a width w. Argon at 20 C blows over the fin giving a convective heat transfer coefficient of 25 W/m-K. Calculate heat transfer rate per unit width using the graphical method and checking the answer with the appropriate equation
1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely...
1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely laminar over the entire plate. a. b. Determine the drag force on one side of the plate. Determine the thicknesses δ, δ*, and θ at the end of the plate (x L). [6 marks] C. For air use,...
1. You have a sheet of carbon steel with a thickness of 1 mm, a length...
1. You have a sheet of carbon steel with a thickness of 1 mm, a length of 300 mm, and width of 150 mm. You are testing it in a furnace that is flowing hot air over the sheet at 3 m/s at T 1 300 K along the length of the metal. The carbon steel is initially at 300k and has the following properties p 7850 R/ C 430 //kok, and R, 1490 W/mK. The carbon steel is sitting...
5. A flaked cereal is of thickness 2L=1.2 mm (or the characteristic length Lc = V/A=...
5. A flaked cereal is of thickness 2L=1.2 mm (or the characteristic length Lc = V/A= 0.6 mm). The density, specific heat, and thermal conductivity of the flake are p 700 kg/m3,cp = 2400J/kg K, and k = 0.34 W/m K, respectively. The product is to be baked by increasing its temperature from Ti = 20 °C to Tr = 220 °C in a convection oven, through which the product is carried on a conveyor. If the oven is Lo...
Problem 9.43 The 4 m x 4 m horizontal roof of an uninsulated aluminum melting furnace...
Problem 9.43 The 4 m x 4 m horizontal roof of an uninsulated aluminum melting furnace is comprised of a 0.08-m-thick fireclay brick refractory covered by a 5-mm-thick steel (AISI 1010) plate. The refractory surface exposed to the furnace gases is maintained at 1700 K during operation, while the outer surface of the steel is exposed to the air and walls of a large room at 25 0C. the emissivity of the steel is 0.3. (a) What is...
1. A very smooth flat plate of length L = 0.5 m and width b =...
1. A very smooth flat plate of length L = 0.5 m and width b = 2 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids; a. Show that the flow is completely laminar over the entire plate. (5 marks] b. Determine the drag force on one side of the plate. [4 marks] c. Determine the thicknesses , 8*, and at the end of the plate (x = L)....
PRINTER VERSION BACK NEXT RCES Supplemental Problem 7.001 A flat plate of width 1 m is...
PRINTER VERSION BACK NEXT RCES Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperature of T,-160°C by using independently controlled, heat-generating rectangular modules of thickness a 10 mm and length b 50 mm. Each module is insulated from its neighbors, as well as on its back side. Atmospheric air at 25°C flows over the plate at a velocity of 30 m/s. The thermophysical properties of the module are k5.2 W/m K, cp...
7.24 Steel (AISI 1010) plates of thickness δ-6mm and length L 1 m on a side are conveyed from a heat treatment process and are concurrently cooled by atmospheric air of velocity u e-10 m/s and To = 20°C in parallel flow over the plates Conveyor Ti Air T For an initial plate temperature of T 300°C, what is the rate of heat transfer from the plate? What is the cor- responding rate of change of the plate temperature? The...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at a temperature of 70°C, and both sides of the plate are suddenly exposed to a convection environment at 20°C with the heat transfer coefficient of h= 800 W/m 2 oC. What will be the center and surface temperatures of the plate after 10 s? For stainless steel (AISI 316), α = 348x10-6 m2/s and k = 13.4 W/m K.
1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely laminar over the entire plate. a. b. Determine the drag force on one side of the plate. Determine the thicknesses δ, δ*, and θ at the end of the plate (x L). [6 marks] C. For air use,...
1. You have a sheet of carbon steel with a thickness of 1 mm, a length of 300 mm, and width of 150 mm. You are testing it in a furnace that is flowing hot air over the sheet at 3 m/s at T 1 300 K along the length of the metal. The carbon steel is initially at 300k and has the following properties p 7850 R/ C 430 //kok, and R, 1490 W/mK. The carbon steel is sitting...
5. A flaked cereal is of thickness 2L=1.2 mm (or the characteristic length Lc = V/A= 0.6 mm). The density, specific heat, and thermal conductivity of the flake are p 700 kg/m3,cp = 2400J/kg K, and k = 0.34 W/m K, respectively. The product is to be baked by increasing its temperature from Ti = 20 °C to Tr = 220 °C in a convection oven, through which the product is carried on a conveyor. If the oven is Lo...
1. A very smooth flat plate of length L = 0.5 m and width b = 2 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids; a. Show that the flow is completely laminar over the entire plate. (5 marks] b. Determine the drag force on one side of the plate. [4 marks] c. Determine the thicknesses , 8*, and at the end of the plate (x = L)....
PRINTER VERSION BACK NEXT RCES Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperature of T,-160°C by using independently controlled, heat-generating rectangular modules of thickness a 10 mm and length b 50 mm. Each module is insulated from its neighbors, as well as on its back side. Atmospheric air at 25°C flows over the plate at a velocity of 30 m/s. The thermophysical properties of the module are k5.2 W/m K, cp...
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