Question

The figure shows a Venturi flow characterized by a a smooth contraction of the pipe diameter D, to a throat diameter D2. The Venturi flow meter is connected to a n-tube manometer at location A where the pipe diameter is D, and to the throat of the contraction at location E where the diameter is D2. Assuming that the density of the air inside the n-tube is negligible, use your knowledge on hydrostatics, continuity and Bernoulli equation to calculate the inflow velocity U at location A, given by the values Di = 0.47 m, D2 = 0.28 m, h1 = 0.79 m and h2 = 0.48 m. Assume the air density inside the tube is negligible and use Pwater = 1000 kg/m3, g = 9.81 m/s2. Give your answer to 2 decimal places. U = (m/s) Water TA D1

Answer 1

Solution:- u Dik - Applying Bernoulles theorm between A se N N E (PA+za) 44+2 = h-ha = 079-0-48 Now VA=U VAXŞD.-= VEND? 7 UX 0.472= VE X 0.2827E = 2.818 U (2.818U)= U2 - 0031 2 x 9.81 6.938 02= 0.31 * 2x9.81 * U=0.936 m/s 7