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a.) Advanatges of Cambered Airfoil over a Flat Plate 1. Wings of cambered airfoils lifts easily compared to Flat Airfoils . 2. Has maximum lift coefficient compared to Flat airfoil b.) Advantage of Thick Airfoil over a flat plate 1. It can adjust spacious fuel capacity tanks and can have landing gear . 2. Thick airfoil develops more lift than flat plate at constant speed , thus enabling low take off and landing speed . |
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a.) What is one advantage of having a cambered airfoil over a flat plate? b.) What...
Air at a temperature of 300 K flows over one side of a flat plate of...
Air at a temperature of 300 K flows over one side of a flat plate of width 1 m at a velocity of 20 m/s. The plate has a constant surface temperature of 350 K. Assume Re(x,c)=5x10^5. a) What is the velocity boundary layer thickness at the end of the plate if L=0.25 m? What if L=1 m? b) Calculate the drag on the plate if L=0.25 m. What is the drag if L=1 m? c) Find the heat transfer...
A very thin flat plate "airfoil" with a 1m chord is placed at an angle of attack α with respect t...
A very thin flat plate "airfoil" with a 1m chord is placed at an angle of attack α with respect to the free stream velocity Voo. The pressure distribution on the top and bottom surfaces of the "airfoil" are given by: pu -5.4x104 + 4x104(x - 1)2 (Nm2) pi- 1.7x105 + 2x104(x - 1)2 (Nm2) where X is the distance from the leadıng edge measured in meters. Neglecting shear stresses, determine the lift and drag forces per unit span. At...
2. The velocity distribution inside a laminar BL over a flat plate is described by the...
2. The velocity distribution inside a laminar BL over a flat plate is described by the equation = a +ay+a,y? +a,y'. Calculate the momentum thickness .
Consider water at 25°C in parallel flow over an isothermal flat plate with a velocity of...
Consider water at 25°C in parallel flow over an isothermal flat plate with a velocity of 0.5 m/s. (a) Calculate the boundary layer thickness : at x = 3 m. What would be the value of 8, if the flow velocity was 0.05 m/s? (b) Calculate the average heat transfer coefficient over the length x.
1. Consider a laminar, incompressible flow over a flat plate where the velocity is given by...
1. Consider a laminar, incompressible flow over a flat plate where the velocity is given by Where η U 1 Show that the displacement thickness, momentum thickness, and shape factor may be expressed as 39 and H-2.69 Hint: First show that Ll
Consider air flows with velocity of U?=U= 10 m/s over a semi-finite smooth flat plate with...
Consider air flows with velocity of U?=U= 10 m/s over a
semi-finite smooth flat plate with L=97 cm long. Calculate the
followings by assuming ? = 1.568 x 10-5 m2/s and ?=1.177
kg/m3.
Figure 1 : Boundary layer over a flat plate
Consider air flows with velocity of U?=U=10 m/s over a
semi-finite smooth flat plate with L=97 cm long. Calculate the
followings by assuming ? = 1.568 x 10-5 m2/s and ?=1.177
kg/m3.
b) Under some flow and boundary...
Required information Air at 25°C and 1 atm is flowing over a long flat plate with...
Required information Air at 25°C and 1 atm is flowing over a long flat plate with a velocity of 7 m/s. The density and kinematic viscosity of air at 1 atm and 25°C are p= 1.184 kg/m3 and V = 1.562x10-5 m2/s. Calculate the distance from the leading edge of the plate where the flow becomes turbulent. The distance from the leading edge of the plate is m. Required information Air at 25°C and 1 atm is flowing over a...
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The thickness of the boundary layer at 0.50 [m] from the leading edge is 6 [mm] (a)...
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The thickness of the boundary layer at 0.50 [m] from the leading edge is 6 [mm] (a) Is the boundary layer laminar or turbulent at that point? (b) At what distance it becomes turbulent? (c) What is the layer thickness at that point?
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The...
Air at 25 °C and 1 atm is flowing over a long flat plate with a...
Air at 25 °C and 1 atm is flowing over a long flat plate with a velocity of 8 m/s. (a) Determine the distance from the leading edge of the plate where the flow becomes turbulent. (b) What will be the boundary layer thickness at the end of the plate? (c) If the plate is a 2m by 2 m square, what will be the friction drag acting on the plate? Schematic Given ssumptions Find v=8m/s xcr ,FD ,δ@x=L L-2m...
(b) For a laminar boundary layer on a flat plate the velocity profile uly) is given...
(b) For a laminar boundary layer on a flat plate the velocity profile uly) is given by 0-30:48) where U is the free stream velocity, y is the distance measured normal to the surface of the plate and is the boundary layer thickness. Determine equations for (i) the momentum thickness , and (8 marks) (ii) the boundary layer thickness d. (7 marks)
A very thin flat plate "airfoil" with a 1m chord is placed at an angle of attack α with respect to the free stream velocity Voo. The pressure distribution on the top and bottom surfaces of the "airfoil" are given by: pu -5.4x104 + 4x104(x - 1)2 (Nm2) pi- 1.7x105 + 2x104(x - 1)2 (Nm2) where X is the distance from the leadıng edge measured in meters. Neglecting shear stresses, determine the lift and drag forces per unit span. At...
2. The velocity distribution inside a laminar BL over a flat plate is described by the equation = a +ay+a,y? +a,y'. Calculate the momentum thickness .
Consider water at 25°C in parallel flow over an isothermal flat plate with a velocity of 0.5 m/s. (a) Calculate the boundary layer thickness : at x = 3 m. What would be the value of 8, if the flow velocity was 0.05 m/s? (b) Calculate the average heat transfer coefficient over the length x.
1. Consider a laminar, incompressible flow over a flat plate where the velocity is given by Where η U 1 Show that the displacement thickness, momentum thickness, and shape factor may be expressed as 39 and H-2.69 Hint: First show that Ll
Required information Air at 25°C and 1 atm is flowing over a long flat plate with a velocity of 7 m/s. The density and kinematic viscosity of air at 1 atm and 25°C are p= 1.184 kg/m3 and V = 1.562x10-5 m2/s. Calculate the distance from the leading edge of the plate where the flow becomes turbulent. The distance from the leading edge of the plate is m. Required information Air at 25°C and 1 atm is flowing over a...
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The thickness of the boundary layer at 0.50 [m] from the leading edge is 6 [mm] (a) Is the boundary layer laminar or turbulent at that point? (b) At what distance it becomes turbulent? (c) What is the layer thickness at that point?
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The...
Air at 25 °C and 1 atm is flowing over a long flat plate with a velocity of 8 m/s. (a) Determine the distance from the leading edge of the plate where the flow becomes turbulent. (b) What will be the boundary layer thickness at the end of the plate? (c) If the plate is a 2m by 2 m square, what will be the friction drag acting on the plate? Schematic Given ssumptions Find v=8m/s xcr ,FD ,δ@x=L L-2m...
(b) For a laminar boundary layer on a flat plate the velocity profile uly) is given by 0-30:48) where U is the free stream velocity, y is the distance measured normal to the surface of the plate and is the boundary layer thickness. Determine equations for (i) the momentum thickness , and (8 marks) (ii) the boundary layer thickness d. (7 marks)
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