Research on Mathematical Model and Optimal Flow Characteristics of Steering Diverter

Wanli Yang, Xingen Wang, Yujie Chen, Yuming Shen

Abstract

The function expression of the flow characteristics of rotary flow diverters was deduced. It can be seen from the expression that when the splitter plate of the diverter moves at a constant speed through the nozzle slot,the optimal flow characteristic curve with an approximately linear relationship is obtained. A flaw of the “Biryukov curves” was pointed out. It is also proposed that the essence of the flow diverter timing error Δt isthe error caused by the installation asymmetry and the flow characteristic asymmetry, not the travel difference. The tow computational equations of timing error were deduced, the equation in JJG 164-2000 (flowmeter method) and the one in ISO 4185 standard (static weighing method). A stepper motor drive system was designed, and experiments on the installation asymmetry of the diverter were carried out. The experimentalresults show that when the diverter splitter plate is triggered in advance, the timing error produces a negative deviation while lag trigger produces a positive deviation; and the greater the distance from the center point, the greater the absolute value of the timing error.

Keywords

Flow diverters; Flow characteristic curve; Biryukov curves; Timing error

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IMEKO-TC9-2019-079.pdf

DOI

10.21014/tc9-2022.079

IMEKO TC

TC9 - Flow Measurement

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