A 1/100th scale submarine model is tested in the lab in water at T=+20 deg C...
A 1/100th scale submarine model is tested in the lab in water at T=+20 deg C at a speed of V=8m/s. The model has the same drag coefficient CD as the actual submarine. The model experiences a drag force of Fdrag=20N. If the actual submarine will also travel at V=8m/s, and in water ranging from T=+5 deg C to T=+30 deg C, what range of drag force will the actual submarine experience under the same conditions? Your dimensionless number is the drag coefficient CD.
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A 1/100th scale submarine model is tested in the lab in water at
T=+20 deg C...
A model of a submarine is built to determine the drag force acting on its prototype
A model of a submarine is built to determine the drag force acting on its prototype. The length scale is 1/100, and the test is run in water at 20° C, with a speed of 8 m/s. Part A If the drag on the model is 25 N, determine the drag on the prototype if it runs in water at the same speed and temperature. This requires that the drag coefficient CD = 2FD/pV2L2 bethe same for both the model and the...
A model of a submarine, 1:15 scale is to be tested at 180ft/s in a wind...
A model of a submarine, 1:15 scale is to be tested at 180ft/s in
a wind tunnel with standard sea-level air, while the prototype will
be operated in sea water.
A model of a submarine, 1:15 scale, is to be tested at 180 ft/s in a wind tunnel with standard sea-level air, while the prototype will be operated in seawater. Determine the speed of the prototype to ensure Reynolds number similarity. Hint: The Reynolds number of the model and prototype...
A submarine model (L/Lm 52 will be tested in fresh water under two different conditions: a)...
A submarine model (L/Lm 52 will be tested in fresh water under two different conditions: a) b) on the surface, where the prototype moves at 25 kt (knots) submerged, where the prototype moves at 2.9 kt Enforcing dynamic similarity in each case, find the model speed (m/s) and the ratio of drag force on the prototype in seawater compared to that for the model. For case (a), compute the ratio of model to prototype Reynolds numbers and discuss its significance....
(40 pts) The drag force exerted on an automobile running at a constant speed of 30...
(40 pts) The drag force exerted on an automobile running at a constant speed of 30 m/s is to be determined by running flow tests on a 1/6 scale model in a water tunnel. The drag force is known to be a function of the characteristic length, L, describing the vehicle frontal section, the vehicle speed relative to the fluid, V, and the fluid density and viscosity. Dimensional analysis has shown the following dimensionless relationship: Cp = º(Re), where FD...
Q5. To predict the performance of a speedboat, a 1:64 scale model has been tested in...
Q5. To predict the performance of a speedboat, a 1:64 scale model has been tested in a water channel. The measurements were taken at a water density of p = 1000 kg/m3 and dynamic viscosity u = 1.00 x 103 N.s/m2 6.25 Water Speed (m/s) | Drag (N) 3 1. 4L 2 9.5 3 12 95 5 important parameters. Briefly explain which dimensionless variables can be neglected in this problem. (Note: it is NOT necessary to carry out an analysis...
A 1:4 scale model of a water pumping station pumping system is to be tested to...
A 1:4 scale model of a water pumping station pumping system is to be tested to determine overall head losses 5. Air at 30 °C, 1 atm, is available. For a prototype velocity of 600 mm/s in a 3-m-diameter section with water at 20°C, determine the air velocity and quantity needed. How may losses determined from the model be converted into prototype losses?
MCE 354 Name A small object (prototype) of dimension 1 mm moves slowly in water. A...
MCE 354 Name A small object (prototype) of dimension 1 mm moves slowly in water. A scale model 100 times larger is tested in glycerin at a velocity of 30 cm/s. The measured drag on the model is 1.3 Newton. Assume the force F on an immersed body in a fluid depends on body length, stream velocity, density and viscosity. (a) Use dimensional analysis to find important dimensionless groups use 5,V,L as Core b) Use similarity analysis to find velocity...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The widt...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The width of the piles is w - 0.5 m and their lengths are either l 2 m or 12 2.5 m. The river of depth of about 20 m runs at 2 m/s. Water density is p 1000 kg/m and its absolute viscosity 1.00 x 10-3 N.s/m2 You are asked to perform dimensional analysis to find the drag force...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The wid...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The width of the piles is w -0.5 m and their lengths are either lı- 2 m or l2-2.5 m. The river of depth of about 20 m runs at 2 m/s. Water density is p 1000 kg/m3 and its absolute viscosityH 1.00 x 10-3 N.s/m2. You are asked to perform dimensional analysis to find the drag force on the...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The widt...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The width of the piles is w 0.5 m and their lengths are eitherl 2 m or 12 2.5 m. The river of depth of about 20 m runs at 2 m/s. Water density is ρ-1000 kg/m' and its absolute viscosityH-1 .00 x 103 N.s/m2 You are asked to perform dimensional analysis to find the drag force on the piles,...
A model of a submarine, 1:15 scale is to be tested at 180ft/s in
a wind tunnel with standard sea-level air, while the prototype will
be operated in sea water.
A model of a submarine, 1:15 scale, is to be tested at 180 ft/s in a wind tunnel with standard sea-level air, while the prototype will be operated in seawater. Determine the speed of the prototype to ensure Reynolds number similarity. Hint: The Reynolds number of the model and prototype...
A submarine model (L/Lm 52 will be tested in fresh water under two different conditions: a) b) on the surface, where the prototype moves at 25 kt (knots) submerged, where the prototype moves at 2.9 kt Enforcing dynamic similarity in each case, find the model speed (m/s) and the ratio of drag force on the prototype in seawater compared to that for the model. For case (a), compute the ratio of model to prototype Reynolds numbers and discuss its significance....
(40 pts) The drag force exerted on an automobile running at a constant speed of 30 m/s is to be determined by running flow tests on a 1/6 scale model in a water tunnel. The drag force is known to be a function of the characteristic length, L, describing the vehicle frontal section, the vehicle speed relative to the fluid, V, and the fluid density and viscosity. Dimensional analysis has shown the following dimensionless relationship: Cp = º(Re), where FD...
Q5. To predict the performance of a speedboat, a 1:64 scale model has been tested in a water channel. The measurements were taken at a water density of p = 1000 kg/m3 and dynamic viscosity u = 1.00 x 103 N.s/m2 6.25 Water Speed (m/s) | Drag (N) 3 1. 4L 2 9.5 3 12 95 5 important parameters. Briefly explain which dimensionless variables can be neglected in this problem. (Note: it is NOT necessary to carry out an analysis...
A 1:4 scale model of a water pumping station pumping system is to be tested to determine overall head losses 5. Air at 30 °C, 1 atm, is available. For a prototype velocity of 600 mm/s in a 3-m-diameter section with water at 20°C, determine the air velocity and quantity needed. How may losses determined from the model be converted into prototype losses?
MCE 354 Name A small object (prototype) of dimension 1 mm moves slowly in water. A scale model 100 times larger is tested in glycerin at a velocity of 30 cm/s. The measured drag on the model is 1.3 Newton. Assume the force F on an immersed body in a fluid depends on body length, stream velocity, density and viscosity. (a) Use dimensional analysis to find important dimensionless groups use 5,V,L as Core b) Use similarity analysis to find velocity...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The width of the piles is w - 0.5 m and their lengths are either l 2 m or 12 2.5 m. The river of depth of about 20 m runs at 2 m/s. Water density is p 1000 kg/m and its absolute viscosity 1.00 x 10-3 N.s/m2 You are asked to perform dimensional analysis to find the drag force...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The width of the piles is w -0.5 m and their lengths are either lı- 2 m or l2-2.5 m. The river of depth of about 20 m runs at 2 m/s. Water density is p 1000 kg/m3 and its absolute viscosityH 1.00 x 10-3 N.s/m2. You are asked to perform dimensional analysis to find the drag force on the...
A bridge is supported by two types of rectangular cross-section piles located in a river as shown in Figure 1. The width of the piles is w 0.5 m and their lengths are eitherl 2 m or 12 2.5 m. The river of depth of about 20 m runs at 2 m/s. Water density is ρ-1000 kg/m' and its absolute viscosityH-1 .00 x 103 N.s/m2 You are asked to perform dimensional analysis to find the drag force on the piles,...
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