Air at 222 °F flows at standard atmospheric pressure in a pipe at a rate of...
Air at 222 °F flows at standard atmospheric pressure in a pipe at a rate of 0.08 lb/s. Determine the minimum diameter allowed if the flow is to be laminar (Re = 2100). Use Physical Properties of Air at Standard Atmospheric Pressure (BG Units).
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Air at 222 °F flows at standard atmospheric pressure in a pipe
at a rate of...
6. (25 points) Water at standard atmospheric conditions flows through a 100 m long plastic pipe...
6. (25 points) Water at standard atmospheric conditions flows through a 100 m long plastic pipe with a circular cross section of diameter D = 0.2 m at an average velocity of 10 cm/s. The flow exits into the atmosphere. The pipe material is smooth and has essentially no roughness. What is the pressure at the pipe entrance if it is horizontal? What is the pressure at the pipe entrance if the elevation increases by 50 cm? A Moody diagram...
105. When an incompressible fluid flows steadily through a round pipe, the pressure drop AP due...
105. When an incompressible fluid flows steadily through a round pipe, the pressure drop AP due to friction is given by where ? is the fluid density, Vis the velocity, L/D is the pipe length-to- diameter ratio, and f is the D'Arcy friction coefficient. For laminar flow, the friction coefficient f can be related to the Reynolds number, Re, by a relationship of the form ??? Use the measured data in Table 5 to determine a and b by a...
Problem The relation between pressure drop and flow rate of laminar flows in a pipe is given by l...
Problem The relation between pressure drop and flow rate of laminar flows in a pipe is given by l bar 50 m 20° 128u dz PS Flow rate Q is the product of the average velocity and the cross-sectional area of the pipe What is the pressure needed to drive a viscous oil flow upslope through a 12 cm diameter pipe? The length of the pipe is 50 meters. The slope is 20°. At the end of the pipe, the...
Water flows through the pipe in the figure below and exits to the atmosphere at the...
Water flows through the pipe in the figure below and exits to the atmosphere at the right end of section C. The diameter of the pipe is 2.12 cm at A, 4.24 cm at B, and 0.880 cm at C. The gauge pressure in the pipe at the center of section A is 1.25 atm and the flow rate is 0.856 L/s. The vertical pipes are open to the air. Find the level (above the flow midline as shown) of...
T,= 75 °C T= 25°C V = 10 m/s Air 3. (25 pts) Atmospheric air at...
T,= 75 °C T= 25°C V = 10 m/s Air 3. (25 pts) Atmospheric air at 25 °C flows across a long pipe at a uniform velocity of 10 m/s. The pipe has an external diameter of 120 mm and its surface temperature is maintained at 75 °C. Determine the rate of heat transfer per unit length of the pipe and the drag force exerted per unit length of the pipe. Hint: You can use the information on the next...
Problem 1: Atmospheric air at 25°C flows over both surfaces of 2 m long flat plate...
Problem 1: Atmospheric air at 25°C flows over both surfaces of 2 m long flat plate maintained at 125°C. For upper surface, velocity of air is 1 m/s and for lower surface, velocity is 10 m/s. (Rex,c = 5x105) (a) Determine the flow condition for upper and lower surfaces. (Laminar, or turbulent). If the condition is that laminar to turbulent is taking place, calculate the position where transition from the laminar to turbulent happens. (b) Determine the rate of heat...
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter...
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter = 2.47 in. Atmospheric Pressure = 12.38 psia Air Temperature = 61 °F The following total pressure to static pressures differences have been measured. Assume that all measurements were made along a line that passes through the center of the pipe. | Radius (inches) 1.25 1.00 0.75 0.5 0.25 Pressure Difference (psid) 0.012 0.019 0.0204 0.028 0.035 0.039 0.037 0.030 0.021 0.017 0.007 0.25...
Air flows steadily in a pipe with a velocity of 60 ft/s. Surrounding the pipe in...
Air flows steadily in a pipe with a velocity of 60 ft/s. Surrounding the pipe in an annulus is a second flow of air with a velocity of 40 ft/s. Both flows are exhausted through a 1.5 ft diameter pipe. If the velocity is uniform at the exit, determine the velocity at the exit. Assume constant density.
Air flows in a 0.50 m diameter pipe at a rate of 15 m/s as shown in Figure 6 Q4 (a) The pipe diameter changes to 1....
Air flows in a 0.50 m diameter pipe at a rate of 15 m/s as shown in Figure 6 Q4 (a) The pipe diameter changes to 1.0 m through a sudden expansion K, Note: For sudden expansion: Assess the pressure rise across this expansion. i. (9 marks) Explain how there can be a pressure rise across the expansion when i there is an energy loss (K, # 0) (2 marks) D2-1.0m Di-0.50 m Q= 15 m/s (1) (2) Figure 6:...
Air flows down a pipe with a diameter of 0.15 m. At the inlet to the...
Air flows down a pipe with a diameter of 0.15 m. At the inlet to the pipe, the Mach number is 0.25, the pressure is 70 kPa, and the temperature is 35°C. If the flow can be assumed to be adiabatic and if the mean friction factor is 0.005, determine the length of the pipe if the Mach number at the exit is 0.6. Also, find the pressure and temperature at the exit to the pipe. ?
6. (25 points) Water at standard atmospheric conditions flows through a 100 m long plastic pipe with a circular cross section of diameter D = 0.2 m at an average velocity of 10 cm/s. The flow exits into the atmosphere. The pipe material is smooth and has essentially no roughness. What is the pressure at the pipe entrance if it is horizontal? What is the pressure at the pipe entrance if the elevation increases by 50 cm? A Moody diagram...
105. When an incompressible fluid flows steadily through a round pipe, the pressure drop AP due to friction is given by where ? is the fluid density, Vis the velocity, L/D is the pipe length-to- diameter ratio, and f is the D'Arcy friction coefficient. For laminar flow, the friction coefficient f can be related to the Reynolds number, Re, by a relationship of the form ??? Use the measured data in Table 5 to determine a and b by a...
Problem The relation between pressure drop and flow rate of laminar flows in a pipe is given by l bar 50 m 20° 128u dz PS Flow rate Q is the product of the average velocity and the cross-sectional area of the pipe What is the pressure needed to drive a viscous oil flow upslope through a 12 cm diameter pipe? The length of the pipe is 50 meters. The slope is 20°. At the end of the pipe, the...
Water flows through the pipe in the figure below and exits to the atmosphere at the right end of section C. The diameter of the pipe is 2.12 cm at A, 4.24 cm at B, and 0.880 cm at C. The gauge pressure in the pipe at the center of section A is 1.25 atm and the flow rate is 0.856 L/s. The vertical pipes are open to the air. Find the level (above the flow midline as shown) of...
T,= 75 °C T= 25°C V = 10 m/s Air 3. (25 pts) Atmospheric air at 25 °C flows across a long pipe at a uniform velocity of 10 m/s. The pipe has an external diameter of 120 mm and its surface temperature is maintained at 75 °C. Determine the rate of heat transfer per unit length of the pipe and the drag force exerted per unit length of the pipe. Hint: You can use the information on the next...
Problem 1: Atmospheric air at 25°C flows over both surfaces of 2 m long flat plate maintained at 125°C. For upper surface, velocity of air is 1 m/s and for lower surface, velocity is 10 m/s. (Rex,c = 5x105) (a) Determine the flow condition for upper and lower surfaces. (Laminar, or turbulent). If the condition is that laminar to turbulent is taking place, calculate the position where transition from the laminar to turbulent happens. (b) Determine the rate of heat...
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter = 2.47 in. Atmospheric Pressure = 12.38 psia Air Temperature = 61 °F The following total pressure to static pressures differences have been measured. Assume that all measurements were made along a line that passes through the center of the pipe. | Radius (inches) 1.25 1.00 0.75 0.5 0.25 Pressure Difference (psid) 0.012 0.019 0.0204 0.028 0.035 0.039 0.037 0.030 0.021 0.017 0.007 0.25...
Air flows steadily in a pipe with a velocity of 60 ft/s. Surrounding the pipe in an annulus is a second flow of air with a velocity of 40 ft/s. Both flows are exhausted through a 1.5 ft diameter pipe. If the velocity is uniform at the exit, determine the velocity at the exit. Assume constant density.
Air flows in a 0.50 m diameter pipe at a rate of 15 m/s as shown in Figure 6 Q4 (a) The pipe diameter changes to 1.0 m through a sudden expansion K, Note: For sudden expansion: Assess the pressure rise across this expansion. i. (9 marks) Explain how there can be a pressure rise across the expansion when i there is an energy loss (K, # 0) (2 marks) D2-1.0m Di-0.50 m Q= 15 m/s (1) (2) Figure 6:...
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