| 摘要 |
<p>An impeller flowmeter capable of improving the accuracy of measuring the flow rate of fluid such as fuel, wherein an impeller (3) is fitted to a holder (4) in such a manner that the distance h (the length of protrusion of the impeller) from the surface (1a) on the impeller (3) side of the inner wall of an injection pipe (1) to the tip of the impeller (3) protruding into the injection pipe (1) is neither more than 1/2 of the outside diameter P of the impeller nor more than 0.3 times as large as the inner diameter D of the injection pipe (1).</p> |
