The total resistance offered to the motion of the boat is 4905 N. Determine

a) Volume of watrer drawn by the pump per second

b) Efficiency of the jet propulsion

Mumbai University > Electronics and telecommunication > Sem 7 > Applied Hydraulics

Marks: 10

Years: DEC 2015

Given :

Velocity of boat, u= 5.5 m/s

Diameter of each jet d= 155 mm = 0.155 m

Area of each jet = $\dfrac {\pi}4 \times (0.155)^2 = 0.01886 m^2$

$\therefore $ Total area of the jets $a=2\times 0.01886 \\ =0.03772 m^2$

Total resistance to motion $=4905 N(500\times 9.81) $ …