| 单词 | volumetric efficiency |
| 释义 | > as lemmasvolumetric efficiency volumetric efficiency n. Mechanics the ratio of the volume of fluid actually displaced by a piston or plunger to its swept volume. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > piston > [noun] > volume through which piston moves > ratio of volumes volumetric efficiency1912 1912 Proc. Inst. Automobile Engineers 6 78 In the writer's opinion, volumetric efficiency is almost entirely a function of port area. 1930 Engineering 11 July 31/2 The standard valve tuning of the E.35 engine is arranged for the best possible volumetric efficiency at 1,500 r.p.m. 1973 A. Parrish Mech. Engineer's Ref. Bk. (ed. 11) ii. 51 Leakage tends to be greater than in a reciprocating design but as they [sc. rotary positive displacement pumps] are often used for viscous fluids such as oil, this effect may be reduced to give a volumetric efficiency of 95%. < as lemmas |
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