A cylinder
(a)
The total drag force
Answer to Problem 17.1PP
Explanation of Solution
Given:
Diameter, d =
Velocity, v =
Length, l =
Formula used:
v is velocity
A is area
d is diameter
Calculation:
For water
Conclusion:
The total drag force on a cylinder when moving through water is calculated as
(b)
The total drag force
Answer to Problem 17.1PP
Explanation of Solution
Given:
Diameter, d =
Velocity, v =
Length, l =
Formula used:
v is velocity
A is area
d is diameter
Calculation:
For air,
Conclusion:
The total drag force on a cylinder when moving through water is calculated as
Want to see more full solutions like this?
Chapter 17 Solutions
Applied Fluid Mechanics (7th Edition)
Additional Engineering Textbook Solutions
Fundamentals of Aerodynamics
Engineering Mechanics: Statics
Vector Mechanics for Engineers: Dynamics
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
DeGarmo's Materials and Processes in Manufacturing
Vector Mechanics for Engineers: Statics
- Question # 3 Air at 15 °C flows at V = 5 m/s over a flat plate of length L= 6 m and width W = 2 m. Calculate the distance from leading edge to the point where the boundary layer is turned from laminar to turbulent for the following cases: a. Surface of plate is smooth. b. Surface of plate is rough. Also calculate the drag force acting on one side of plate for each case. V = 5 m/s 6 marrow_forwardPlease help me answer this problem ASAP badly needed. Thank youarrow_forwardQ6. Two large fixed parallel planes are 12 mm apart. The space between the surfaces is filled with oil of viscosity 0.972 N.s / m². A flat thin plate 0.25 m² area moves through the oil at a velocity of 0.3 m / s. Calculate the drag force: (1) When the plate is equidistant from both the planes, and (ii) When the thin plate is at a distance of 4 mm from one of the plane surfaces.arrow_forward
- A vertical air stream flowing at a velocity of 100 m/s supports a ball of 60 mm in diameter. Taking the density of air as 1.2 kg/m³ and kinematic viscosity as 1.6 stokes, the weight of the ball that is supported is (if coefficient of drag C= 0.8)arrow_forwardA marine vehicle tows a hollow cylinder of 760 mm diameter and 5.5 m length. The cylinder is fully submerged in seawater with its axis aligned to the flow direction. Estimate the allocated power the marine vehicle needs to drag this cylinder at a speed of 6 knots and also calculate the thickness of the boundary layer at the trailing edge.arrow_forwardA portion of ship’s hull can be idealized as a flat plate, 100ft long. If the ship’s velocity is 10 ft/s and the properties of the water it is moving through are ρ=62.4lbm/ft³ and µ=3.0lbm/hr.ft, calculate the maximum boundary layer thickness.arrow_forward
- A stationary sphere in water moving at a velocity of 2.3 m/s experiences a drag of 6N.Another sphere three times the diameter is placed in a wind tunnel.The ratio of kinematic viscosities of air and water is 15, and the density of air is 1.28 kg/m3.Determine the velocity of the air and the drag which will give dynamically similar conditions.arrow_forward1. An airplane weighs 36,000 lb. and has a wing area of 450 fte. The drag equation is C, =0.014 + 0.05C} . It is desired to equip this airplane with turboprop engines with available power such that a maximum speed of 602.6 mph at sea level can be reached. The available power is assumed to be independent of flight speed. Calculate the maximum rate of climb and the speed at which it occurs. Given: W = 36,000 lb S = 450 ft² C, = 0.014+0.05C V = 602.6 mph max THPy = cons tan t THP AV constant Max EHP Point of THP, REQD. Flisht Speed. V Vmax 602.6 mph Required: Max R.C. and Vmax R.C. Horsepower, hparrow_forwardQuestion 2 Air at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m. Calculate the boundary layer thickness at the trailing edge of plate and drag force on one side of plate if: a. Surface of plate is smooth. b. Surface of plate is rough. The air properties at 20 °C are: Density, p = 1.2 kg/m³ and dynamic viscosity, u= 1.8x 105 kg/m s and kinematic viscosity, v = 1.516x10 m /s. www wwwarrow_forward
- B2 is flying at an altitude of 43,000 ft and a speed of 400 KTAS under standard atmospheric conditions. If the average aerodynamic chord is 39,6 ft, calculate the Reynolds number and the average % aerodynamic chord present on the wingarrow_forwardLooking for correct answer ,If can't leave it.arrow_forwardFluid Mechanics Problem: A ship is 150 m long and has a wetted area of 5000 m2.If it is encrusted with barnacles, the ship requires 7000 hp to overcome friction drag when moving in seawater at 15 kn and 20oC. What is the average roughness of the barnacles? How fast would the ship move with the same power if the surface were smooth? Neglect wave drag. Note: Treat the ship hull as a flat plate. Use eq. 7.48b to find effective barnacle roughness height.Use equation (7.45) White for the drag coefficient CD = D/.5pV2A , where A is the hull (plate) area, to find the ship velocity for smooth plate.arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY