Department of Mechanical Engineering
MEC3033F – Thermofluids II
Fluids Lab 1 – Pelton Wheel
Date of submission: XX April 2013
1. I know that plagiarism is wrong. Plagiarism is to use another’s work and pretend that it is one’s own. 2. Each significant contribution to, and quotation in, this assignment from the work(s) of other people has been attributed, and has been cited and referenced. 3. This assignment is my own work.
4. I have not allowed, and will not allow anyone to copy my work with the intention of passing it off as his or her own work.
EXPERIMENT PERFORMED BY
WILLIAM LIW TAT MAN
Date: 11 March 2013
The aim of this practical is to examine aspects of a single-stage air compressor. Introduction and theory
In this practical, we need
1. To determine the instantaneous value of the (polytropic)coefficient of compression from the slop of the pressure/volume(P/v) diagram, near the start, in the middle and at the end of the compression. 2. To determine the indicated work/cycle of the compressor from the P/v diagram. Where:
Work/cycle=(m.e.p) x (piston-area) x stroke
And m.e.p= mean effective pressure= average pressure(i.e stroke of the compressor) 3. To determine the volumetric efficiency of the compressor.
A pressure transducer is used so that a potential drop will be created for a change in pressure. A similar process is used to capture the volume being compressed. These voltages are then captured by an oscilloscope with respect to time.
The values of several different readings are noted from the digital display on the control board.
A graph of the voltages corresponding to the pressure is plotted against those corresponding to the volume. The plot obtained is of the same shape as that of a P-v...
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