Keyword: Model of compensation of turbine flowmeter viscosity is agglutinant liquid
One preface
Traditional turbine flowmeter can use the liquid flow that measures low viscosity only, wait like water, benzine. Turbine flowmeter manufactory also stipulates viscosity of the liquid that be measured must not be more than 5MPaS commonly, will produce serious error otherwise. How to measure sensor by turns with traditional eddy accurate the liquid flow that measures liquid viscosity to be more than 5MPaS, the discharge that waits like crude oil, mechanical oil, can cause our extensive attention.
This research uses flow transducer of LW traditional turbine to regard research as the object, undertook to its extensive theory and experiment study, the medium viscosity that got this kind of flow transducer compensates a model, meanwhile, we still developed the turbine flowmeter that has viscosity to compensate a function automatically to accumulate calculate indication meter, so traditional eddy measures sensor by turns, apply corresponding viscosity to compensate a model, deserve to calculate indication meter with this accumulating, can come true to be measured to agglutinant liquid discharge.
2 medium are agglutinant the influence experiments
Hochreiter(1) and Shafer(2) ever gave out turbine discharge sends feeling medium the physical model of agglutinant influence.
(1)In typeF---------The frequency that sensor gives out;
Q--------Instantaneous discharge; V---------Viscosity of motion of the liquid that be measured.
Type (1) call namely " the general viscosity curve of turbine flowmeter " . Among them, Φ is more than 1 type; The form of Φ must decide through the experiment.
For this, we had medium above all the experiment of agglutinant influence, test facilities is shown 1 times like the graph. Span of experiment medium viscosity is 1 ～ 95.6MPaS; The model of experiment turbine flow transducer is LW, 25 model.
(2)
Graph 2 gave out test result. The K in the graph is actual appearance constant
E is identical error, the definition is
(3)
Know by test result. Achieve 8.91mm when viscosity
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