150 km/h SIGN 1.5 m

Q: During a high Reynolds number experiment, the total drag force acting on a spherical body of…

A: Given data, From stokes equation,

Q: Wind loading is a primary consideration in the design of the supporting mechanisms of billboards, as…

A:

Q: During major windstorms, high vehicles such as RVs and semis may be thrown off the road and boxcars…

A: Draw the free body diagram.

Q: At highway speeds, about half of the power generated by the car’s engine is used to overcome…

A: Given data: Velocity when a person drives normally, V1 = 55 mi/h Velocity when a person drives…

Q: How important is the study of aerodynamics in designing an aircraft and the effect on performance

A: How important is the study of aerodynamics in designing an aircraft and the effect on performance?

Q: By which part of the Aircraft is mainly produced the "Induced drag" ??

A: Lift causes induced drag, which is unavoidable.

Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…

A:

Q: Use appropriate boundary conditions to evaluate the constants in the boundary layer velocity profile…

A: Suppose a fluid moving with a velocity 'u' in a viscous flow and whose vertical distance from the…

Q: An automotive engine can be approximated as a 0.4-m-high, 0.60-m-wide, and 0.7-m-long rectangular…

A: Given data: *The height of the automotive engine is h=0.4 m. *The width of the automotive engine is…

Q: A turbojet engine weight 7 kN and has a wing area of 20 m2. The drag coefficient of aircraft is…

A: Turbojet engine weight, FL=7 kN=7*103 N Wing area, A=20 m2 Drag coefficient of air craft,…

Q: The power delivered to the wheels of a car is used to overcome aerodynamic drag. Compare the amount…

A:

Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…

A: Given that, The drag force on the car will be –

Q: A jet airplane weighs 160,000 N and has a zero-lift drag coefficient of 0.008 and a wing area of 42…

A: Write the given data for the airplane.     W=160000 NCD0=0.008    A=42 m2     v=100 m/s    rc=11.5…

Q: A 70 kg bicyclist is riding her 15 kg bicycle downhill on a road with a slope of 8° without pedaling…

A:

Q: The resultant of the pressure and wall shear forces acting on a body is measured to be 470 N, making…

A: Given data as per question Force =470 N Angle = 330

Q: Is there any conflict between the boundary condition respect to the airfoil surface and the induced…

A: The boundary layer affect the lift line.

Q: On a flat plate; Explain the boundary layer thickness, displacement thickness and momentum thickness…

A: Boundary-Layer  This condition says the fluid speed on the solid surface is the same as the surface…

Q: An airplane with a NACA 662-215 airfoil cruises at 170 m/s at an altitude of 4550 m. The airfoil has…

A: Velocity = 170 m/s Altitude = 4550 m Aspect ratio = 9 Span length = 30 m Angle of attack = 2

Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…

A: Given details: Ai=18 ft2Ao=15 ft2d=12000 mi=12000×5280=63360000ftv=55…

Q: A 0.80-m-diameter, 1.2-m-high garbage can is found in the morning tipped over due to high winds…

A: Draw diagram of can when it is just to lift about point P, Given

Q: What effect does increasing the Reynolds number have on coefficient of lift and drag?

A: we know that Reynolds no. is defined as the ratio between flow inertia and viscosity.

Q: At highway speeds, about half of the power generated by the car’s engine is used to overcome…

A: Given data: The initial velocity of the car, V1 = 55 mi/h. The final velocity of the car, V2 = 70…

Q: How does the air behaves at zero degree?When is the flow turbulent?When does the boundary layer…

A: The chaotic movement of a gas's particles, according to the physical definition of temperature,…

Q: Which car is more likely to be more fuel-efficient: one with sharp corners or one that is contoured…

A: Whenever a solid moves past a fluid it experiences two kinds of force one in the flow direction…

Q: An airplane has a total mass of 35,000 kg and a wing planform area of 65 m2. The airplane is…

A: Given: the velocity of the plane, V=1100 km/h=1100×10003600=305.556 m/s Ballance the lift force with…

Q: The velocity profile for a turbulent boundary layer over a flat plate is to be approximated by the…

A: The given velocity profile is – The two boundary conditions for boundary layer flow is – From…

Q: During a winter day, wind at 70 km/h, 5°C, and 1 atm is blowing parallel to a 4-m-high and 15-m-long…

A: Velocity of wind = 70 km/h = 19.444 m/s The pressure of the air = 1 atm Length of the wall = 15m…

Q: Explain the difference between a favorable and an adverse pressure gradient in a boundary layer. In…

A: Bulk flows are governed by the pressure gradient. The fluid will flow in direction of decreasing…

Q: A 2-m-long, 0.2-m-diameter cylindrical pine log (density = 513 kg/m3) is suspended by a crane in the…

A: Given, The density of the log, ρ=513 kg/m3 The diameter of the log, D=0.2 m The length of the log,…

Q: A 30-cm-diameter smooth ball of dėnsity Ppall = 210 kg/m³ is tied to an object on the bottom of a…

A: Given: The diameter of smooth ball, d = 30 cm The density of ball, ρball = 210 kg/m^3 The density of…

Q: What is flow separation? What causes it? What is the effect of flow separation on the drag…

A: Flow separation It is a process in which the boundary layer of the fluid detaches itself from the…

Q: A 2-m-long, 0.2-m-diameter cylindrical pine log(density =513 kg/m3) is suspended by a crane in the…

A: The related diagram is given as, The density of air is written as, The dynamic viscosity at 5 oC…

Q: 1.    Consider an light plane aircraft with a characteristic of: Wing area = 181 ft2 Aspect ratio =…

A: Solution: Given Data: A=181 ft2AR=6.2ηo=0.91W=3000 lbCD,o=0.027Pmax=345 hpηp=0.83V∞=100 ft/s   Note:…

Q: The drag coefficient of a vehicle increases when its windows are rolled down or its sunroof is…

A: Given data: The frontal area of the car, A = 18 ft2. Drag coefficient when the sunroof is closed,…

Q: What is necessary to increase the Lift to Drag ratio and its Maximum value?

A:

Q: Define the planform area of a body subjected to external flow. When is it appropriate to use the…

A: Planform area: Plan area of an object is taken as the planform area. The plan is the view of the…

Q: Water at 10°C flows over a 4.8-m-long flat plate with a velocity of 1.15 m/s. If the width of the…

A: Given, T = 10°C L = 4.8 m v = 1.15 m/s d = 6.5 m ρ = 999.7 kg/m3 µ = 1.307×10-3 kh/m.s f = ?

Q: Water at 10°C flows over a 1.1-m-long flat plate with a velocity of 0.55 m/s. If the width of the…

A: Given data: The density of water, ρ = 999.7 kg/m3. Dynamic viscosity of water, µ = 1.307×10-3…

Q: A person is driving his motorcycle at a speed of 90 km/h in air at 20°C. The frontal area of the…

A: Given: The speed of motorcycle is V=90 km/h. The temperature of air is T=20°C. The frontal area of…

Q: During major windstorms, high vehicles such as RVs and semis may be thrown off the road and boxcars…

A: Take the drag coefficient CD, 2.2  air density to be 1.1 kg/m3 Take the moment about wheel…

Q: The resultant of the pressure and wall shear forces acting on a body is measured to be 430 N, making…

A: The drag force  FD=FRcos30°=430cos30°=372.4N

Q: A 3-m-high, 6-m-wide rectangular advertisement panel is attached to a 6-m-wide, 0.15-m-high…

A: From the given data,

Q: Define the frontal area of a body subjected to external flow. When is it appropriate to use the…

A: Frontal area is the projected area of the body to a plane which is normal to the flow of the fluid.…

Q: A 2-m-high, 4-m-wide rectangular advertisement panel is attached to a 4-m-wide, 0.15-m-high…

A: Given data as per question wind speed = 150 km/h = 150/3.6 m/s width of  rectangular advertisement…

Q: Air is flowing past a spherical ball. Is the lift exerted on the ball zero or nonzero? Answer the…

A: When air is flowing past a spherical ball, the lift exerted on the ball is zero if the ball is…

Q: determined experimentally. If the frontal area of the car is 2 m?, and the force acting on the car…

A:

Q: What is the difference between streamlined and bluff bodies? Is a tennis ball a streamlined or bluff…

A: If bodies subjected to fluid,flow can be classified as sreamlined or bluff body. a body is said to…

Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…

A: Given data,