| 摘要: |
| 作者在移植改进和试验PVC管、截径比0.5的圆缺孔板式量水计成果基础上,采用石棉水泥管制作的方法,进行了不同截径比量水特性的试验研究。结果表明,各截径比的流量系数及水压差与流量的关系较稳定,相对误差均<2.O％;不同截径比的测流精度均<3.0％;角接测压与等径距测压的流量系数相差甚微,测流精度接近,但前者测流界限稍宽,水头损失较大。 |
| 关键词: 圆缺孔板,截径比,流量系数,测流精度,水压差,流量,水头损失 |
| DOI： |
| 分类号: |
| 基金项目: |
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| EXPERIMENTAL RESEARCH ON THE BEHAVIOURS OF VARIOUS RATIOS OF SECTIONAL DIAMETERS OF ROUND ORIFICE PLATE THROTTLE WATER GAGE IN WATER MEASUREMENT |
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Lin Xincui
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| Abstract: |
| The author of this paper carried out the experiments of the dehaviours of various ratios of sectional diameters in water measurement by the means of making asbestos-cement pipes based on the achievement of transformation and improvement of PVC pipe test and the round orifice plate throttle water gage with the ratio of 0.5 sectional diameter.Research results indicated that the flow coefficients of various sectional diameter ratios and difference in water pressure in relation to flow were rather stable, and the relative errors were less than 2.0%.The accuracy of measured flow of various sectional diameter ratios were less than 3.0%.The errors of flow coefficients at angle joints and at iso-diameter distance are slight.The accuracy of flow measurement was close to. The former had the slight wider boundary for flow measurement, but water head loss was great. |
| Key words: round orifice plate, sectional diameter ratio, flow coefficient,flow measurement accuracy,water pressure difference,flow, water head loss |
