Questions from Thermal Fluid Science

Q: How do flaps affect the lift and the drag of wings?

How do flaps affect the lift and the drag of wings?

Q: A water pump increases the water pressure from 15 psia to 70

A water pump increases the water pressure from 15 psia to 70 psia. Determine the power input required, in hp, to pump 0.8 ft3/s of water. Does the water temperature at the inlet have any significant e...

Q: A 2.4-in-diameter smooth ball rotating at

A 2.4-in-diameter smooth ball rotating at 500 rpm is dropped in a water stream at 60°F flowing at 4 ft/s. Determine the lift and the drag force acting on the ball when it is first dropped in the water...

Q: Consider an aircraft that takes off at 260 km/h when

Consider an aircraft that takes off at 260 km/h when it is fully loaded. If the weight of the aircraft is increased by 10 percent as a result of overloading, determine the speed at which the overloade...

Q: Consider an airplane whose takeoff speed is 220 km/h and

Consider an airplane whose takeoff speed is 220 km/h and that takes 15 s to take off at sea level. For an airport at an elevation of 1600 m (such as Denver), determine (a) the takeoff speed, (b) the t...

Q: A jumbo jet airplane has a mass of about 400,000

A jumbo jet airplane has a mass of about 400,000 kg when fully loaded with over 400 passengers and takes off at a speed of 250 km/h. Determine the takeoff speed when the airplane has 150 empty seats....

Q: Reconsider Prob. 15–77. Using appropriate software, investigate

Reconsider Prob. 15–77. Using appropriate software, investigate the effect of passenger count on the takeoff speed of the aircraft. Let the number of passengers vary from 0 to 500 in increments of 50....

Q: A small aircraft has a wing area of 40 m2, a

A small aircraft has a wing area of 40 m2, a lift coefficient of 0.45 at takeoff settings, and a total mass of 4000 kg. Determine (a) the takeoff speed of this aircraft at sea level at standard atmosp...

Q: Name some applications in which a large drag is desired.

Name some applications in which a large drag is desired.

Q: Consider a light plane that has a total weight of 11,

Consider a light plane that has a total weight of 11,000 N and a wing area of 39 m2 and whose wings resemble the NACA 23012 airfoil with no flaps. Using data from Fig. 15–45, determine the takeoff spe...