Abstract A novel differential pressure flowmeter with an olive-shaped flowmeter (OSF) is proposed and investigated both experimentally and numerically. The streamline, pressure and velocity are obtained and numerically analysed. The results indicate that the proposed OSF exhibits less permanent pressure loss than the orifice plate flowmeter (OPF). The pressure also tends to be more stable in the OSF, which ensures high measurement accuracy and repeatability. The OSF is superior to the OPF in terms of relative pressure loss, streamline distribution, pressure distribution and velocity distribution. In the experiment, an oil pump transported diesel oil into the measurement pipe, through the check valve, filter, pressure-regulating container, and flow-regulating valve, before it was finally returned to the fuel tank. The experimental results showed that the pressure loss of the OSF was only about 14.94% of that of the OPF under the same conditions. The pressure loss curve of the OPF increased rapidly by up to 2,700 Pa with each 1 m3/h increase in the flow rate, whereas that of the OSF increased only slightly.

中文翻译：

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新型橄榄形流量计 (OSF) 流动特性的实验和数值研究

摘要 提出了一种带有橄榄形流量计 (OSF) 的新型差压流量计，并进行了实验和数值研究。获得并数值分析了流线、压力和速度。结果表明，所提出的 OSF 表现出比孔板流量计 (OPF) 更少的永久压力损失。OSF 中的压力也趋于更稳定，从而确保高测量精度和可重复性。OSF在相对压力损失、流线分布、压力分布和速度分布方面优于OPF。实验中，油泵将柴油输送到计量管内，通过止回阀、过滤器、调压容器、流量调节阀，最后返回油箱。实验结果表明，在相同条件下，OSF的压力损失仅为OPF的14.94%左右。OPF 的压力损失曲线随着流速每增加 1 m3/h 迅速增加至 2,700 Pa，而 OSF 的压力损失曲线仅略微增加。