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Calling on your experience and physical intuition, answer the following: (a) Will the workpiece cool more quickly in the vertical or horizontal arrangement if the only air motion that occurs is due to buoyancy of the air near the hot surfaces of the workpiece (referred to as free or natural convection)? (b) If a fan blows air over the workpiece (referred to as forced convection), would you expect the cooling rate to increase or decrease? Why? 1.26 An automobile engine normally has a coolant circulating through passageways in the engine block and then through a finned-tube radiator. Lawn mower engines normally have finned surfaces directly attached to the engine block, with no radiator, in order to achieve the required cooling. Why might the cooling strategies be different in these two applications?
The direction of the forces are 0,-30 and +120 degrees from the positive X axis. Determine the magnitude and direction of the resultant force.
At a section in a passage, the pressure is 150 kPa (abs), the temperature is 10 deg C, and the speed is 120 m/s. For isentropic flow of air, determine the Mach number at the point where the pressure is 50 kPa (abs). Sketch the passage shape.
To determine the heat transfer characteristics of a cylinder under cross flow conditions when the cylinder is isolated.
Design of absorption column and the cooler. Process design of other units should be completed along with pipe sizes.
Steam enters the turbine of a simple vapor power plant with a pressure of 160 bar and a temp of 560 C and expands adiabatically to 0.08 bar
calculate the quality of the system to begin with. calculate the amount of liquid water to begin with. calculate the heat transfer during the heating process.
Specifies that just the data points be marked with a circle. Showing the general trend of safety as a function of dia, with the actual data points marked by a circle. Is that explanation of the plot command still a little opaque?
The purpose of this project is to introduce you to the application of FEA by using the ANSYS software to examine the deflection of an I-beam under a point load.
An auto speedometer is graduated in 5 mph increments and has an accuracy rated to be within ±4%. Estimate the uncertainty in indicated speed at 60 mph.
An Industrial water shutoff valve is designed to operate with 40lbs of force and will encounter 150lbs of resistance force applied to a 2in diameter axle. What is the required actual mechanical advantage of the system?
A steel rod 1 cm in diameter and 30 cm long protrudes from a steel surface at 150 C. The rod is surrounded by air at 10 C with a convective heat transfer coefficient of 10 W/m2 C. The thermal conductivity of steel is 114 W/m C. Determine the heat ..
Determine a symbolic expression for the total thermal resistance of wall, including inside and outside convection effects for prescribed conditions.
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