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首页> 外文期刊>Running algorithm of simulator of wireless distributed measurement-control system with rule based processing >Flow averaging tube geometry improvement for K-factor stability increase
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Flow averaging tube geometry improvement for K-factor stability increase

机译：改进平均流管的几何形状以增加K因子的稳定性

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摘要

Fluid flow around two-profile averaging differential pressure sensor was investigated in this paper. Research concentrated particularly on fluid movement direction and velocity over the investigated flow sensor. Analysis was conducted experimentally in low velocity wind tunnel. Because of large number of measuring points placed very close to each other, it was decided that velocity profile measurement will be performed by means of fully automated test stand. Due to a recirculation of the stream in the vicinity of the probe tested in the wind tunnel, an original two-direction probe was used. A linear module with a stepper motor formed an integral part of the measurement system. The location of the measuring probe, the possibility of adjusting stream mean velocities and data acquisition was undertaken by means of a dedicated program. The above mentioned investigation method helped to improve the metrological properties of the flowmeter applying non symmetrical probe cross-section forced air stream to be redirected in the desired direction. This modification significantly increased K-factor value and stability of air flow through the contraction of the flowmeter.
机译：本文研究了两轮廓平均压差传感器周围的流体流动。研究主要集中在所研究的流量传感器上的流体运动方向和速度。在低速风洞中进行了实验分析。由于大量的测量点彼此非常靠近，因此决定通过全自动测试台进行速度分布测量。由于气流在风洞中测试的探头附近再循环，因此使用了原始的双向探头。具有步进电机的线性模块构成了测量系统的组成部分。测量探针的位置，调整流平均速度的可能性和数据采集是通过专用程序进行的。上述研究方法通过使用非对称探针横截面强制气流沿期望的方向重定向，有助于改善流量计的计量性能。这种修改大大提高了K系数值，并通过流量计的收缩增加了气流的稳定性。

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