Abstract
The gasflowmeter with throttling device is theoretically based upon Bernoulli's theorem. This flowmeter enables us not only to know the volume flow rate of gas by measuring temperature difference between two cross sections, but also to know the mass flow rate of gas by measuring pressure difference and temperature difference.
The apparatus used in the experiments is a Venturi tube with ratio 0.071 in area and with convergence angle of 20 degrees and divergence angle of 8.4 degrees. The experimental results, in the region of Reynolds number 2.5×103∼19.2×103, show that the discharge coefficient for volume flow rate is 1.4×2.1 and the discharge coefficient for mass flow rate is 0.08∼0.12.
