基于旋转分流的同向换向器流量测量模型及实验研究

针对水流量标准装置中不同向开式换向器带来误差问题,研制了一种旋转分流型的同向换向器,分析了新换向器工作原理,建立了新换向器流量测量数学模型;根据流量测量数学模型推导过程得出了流量测量结果不受脉冲触发位置、流速分布及换入-换出时间影响的结论。在水流量标准装置上对新研制换向器进行了实验,结果表明:新换向器较好地克服了不同向换向器对流量测量带来的误差问题,可以代替不同向换向器用于水流量标准装置进行流量测量。

Flow Rate Measurement Model and Experimental Research of Unidirectional Diverter Based on Rotating Shunt

To reduce the measurement error caused by the non-unidirectional diverter in the water flow standard facility, an unidirectional diverter was manufactured. The principle of the new diverter was analyzed and the flow rate measurement model also was developed based on the principle. The following conclusions were obtained that the measurement results had nothing with pulse trigger position, velocity distribution and diverting time according to the flow measurement model derivation process. The experimental research was carried out by means of the water flow standard facility. Experimental results showed that the new diverter could reduce the errors caused by the non-unidirectional diverter. So the new diverter could be used for the water flow calibration facility to measure water flow rate intead of the non-unidirectional diverter.