Abstract
The Author has determined the optimum dimensions of the jet pump by systematic experiments. (a) The length from the outlet of nozzle to the inlet of diffuser throat should be less than 1.5dt (dt=diameter of diffuser throat), and the length from the outlet of nozzle to the inlet of diffuser divergent part should be 5∼6dt. (b) The conical angle at the inlet of diffuser has little effect in the range 24°∼56°. It is shown that the characteristic equation obtained in this paper closely coincides with experimental results when the optimum dimensions are taken. And study on the most important value of the jet pump "area ratio of nozzle throat and diffuser throat" is advanced, and the relations which make the efficiency maximum in its given condition are given. By these, it is shown that the efficiency of the jet pump can take a value of 37∼38% as a maximum value.
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