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Experimental and numerical study on swirlmeter with different helix angles of swirler

机译:不同螺旋角度旋转角度的旋流计的实验和数值研究

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摘要

Swirlmeters are widely used to measure the flowrate in engineering due to its simple structure, stable operation stability, and accurate measuring precision. In this paper, in order to disclose the influence of different helix angles of swirler on the metering characteristics of the swirlmeter, the metrological performance and internal unsteady flow of a swirlmeter assembled with three swirlers with different helix angles were studied through physical experiments and numerical calculations. The results show that with the increasing helix angle of swirler, the pressure loss of swirlmeter and meter factor K decrease almost linearly, the vortex core center at throat of the swirlmeter is gradually off-center. In the direction of central axis of the throat, the amplitude of dominant frequency of pressure pulsation increases with the increasing helix angle of swirler.
机译:由于其结构简单,操作稳定性和精确测量精度,旋转速度广泛用于测量工程中的流量。 在本文中,为了公开不同螺旋角对旋流计的计量特性的影响,通过物理实验和数值计算研究了用三个具有不同螺旋角的三个旋流器组装的旋流计的计量性能和内部不稳定流动 。 结果表明,随着旋流器的螺旋角度的增加,旋转计和仪表因子k的压力损失几乎线性地减少,旋转仪在旋转计的喉部处的涡旋芯中心逐渐偏离中心。 在喉部的中心轴的方向上,压力脉动的主频率的幅度随着旋流器的增加而增加。

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