Question

A water jet strikes a vane and exerts a force on it. This force is balanced by the weight W. The purpose of this experiment is to compare the theoretical force on the vane with the experimentally measured force. The experiment is as follows:

We measure the outlet diameter, d, of the nozzle. Then, we fasten θ=90o ? vane to its support and adjust the balance spring to give a zero reading when there is no weight, W, on the platform and no flow through the nozzle. We place a known mass, m, on the platform and adjust the control valve on the pump to provide the necessary flowrate from the nozzle to return the platform to a zero reading. We determine the flowrate by collecting a known weight of water, Wwater, in the weigh tank during a measured amount of time, t. We repeat the measurements for various masses, m. Subsequently, we repeat the experiment using a θ=180o vane. The experimental measurements data are given in the table below.

1. For each vane, plot the experimentally determined weight, W, as a function of water jet velocity V.

2. Calculate the weight W theoretically for each vane and plot the results on the same corresponding graph.

3. Explain any difference you may observe between the theoretical and experimental results.

4. 

   Weight W 10 eta Balance spring Vane

5. 

Answer 1

FM- 2-onis 1 unit = 0.5 Newton yanis 6 OM/L 5 iunie (V) or (With @=900) ol Neniton vlmls) with (Necuton) with (Newton) 2 1.5 Werp, Neanton

xanih len't to.5 Newton gtornis Lunit - imts (V) I Newton (Won) o=180] w(m/s) (Ummon) wens (3/17 Wan kreaton) 2 - z 2.5 3 3-5 6 0.5 birp, Neuntons
check the values of 't' in theta 180deg ie..flat plate..