Purpose
The purpose of the experiment is providing an opportunity to students of experience to familiarize with some key aspects of fluid flow in pipe, notably friction losses and verify theory. In this experiment, required equipment are a water tank, piezometric tubes, pump, a stop watch, empty bucket and a digital weight scale. By operating the pump to keep the water is full in the water tank, and measuring the height of water in the piezometric tubes in different height of water outlets. And measuring the flow rate of water in different height outlets with the stopwatch, empty bucket and digital weight scale. After experiments done, use the data of experiments to calculate the velocity and the flow rate of water in the pipe through by the Bernoulli equation. Then compare the calculate results and practical results to approve the theory. The calculated results should very be close to the practical results. There is a necessary discussion of errors due to relevant issues.
Equipment
Water pump
Water tank
Excess water collector
One transparent plastic tube for connecting the water pipe and piezometric tubes.
Five plastic as piezometric tubes.
The tube for connect water tank and other tubes should has larger diameter, and the piezometric tubes have same diameter and smaller diameter.
Bucket
Digital weight scale
Experiment sketch
The equipment are set up as following sketch
Water tank
The piezometric tubes
Water outlet
Procedures
1. Fill up the tank
2. Adjust the Exit height Ze to be 1300mm
2.1 Use bucket, scale, and timer to get Qm-measuring the volume of water flow to bucket in 20s.
2.2 Meanwhile, measure the height of water in piezometric tubes y1, y2, y3, y4, y5.
2.3 Assume a friction factor f
2.4 Use f to calculate Ve
2.5 Use Ve to calculate Re
2.6 Use Re,