Solid-Phase Fraction Calculation Based on ERT in Uneven Fields

The computation of solid-phase fraction (SPF) in pipe is very inaccurate in a detection with uneven distribution of solid phase objects in the solid-phase two-phase flow. To overcome the problem, a computable mathematical model is used to simulate the distribution of any uneven field, and an index for measuring the uneven degree is proposed. The relationship between the index and the physical parameters in the detection field is established. All measured values under the even distribution are retrieved and reconstructed based on the principle of electrical resistance measurement. The effects of uneven distribution of solid-phase objects are analyzed on the accuracy of SPF calculations. According to the uneven index, a new method for calculating the solid-phase fraction under is proposed after recalculating and evaluating all measurements. After applying this method, the maximum error of low flow rate decreases from 8.65% to 5.96%, and the relative error decreases from 4.93% to 5.81%. Experimental results verify that the proposed method has higher accuracy and application value than the existing methods.