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1 cm diameter jets of clawn sprinkler force opposite directions. Flow of 3 litres/sec enters rotating arm in normal direction. Jets are equidistant from centre. The centre to centre distance between

the jets is 4cm. Find the speed of rotation and the torque required to hold the sprinkler stationary

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Diameter of jet d=1cm =0.01 m

Q=3l/s=31000m3/s=0.003m3/s

l=64cm =0.64 m

r1=r2l2=0.642=0.32m

Area of jet

A=π4×d2=π4×(0.01)2

=0.7854×104m2

Quantity of discharge from each nozzle

Q1=Q2=0.0032=0.0015m3/s

Velocity of jet,

V=VA=VB=Q1A=0.00150.7854×104=19.1m/s

Absolute Velocity if water leaving the jets

V1=VAw.r2     V2=Vaw.r2

$V_{1}=19.1-w\times 0.82 \ \ \ \ …

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