Optimization And Improvement Design On The Structure Of Swirl-meter

Swirl-meter is one kind of fluid oscillation flow meter which is used to measure thetemperature and pressure of the transmission medium. Swirl-meter can automaticallycompensate and correct the compression factor, obtain the standard volume flow and totalvolume of the gas directly. Due to the non-mechanical rotating parts, low corrosion, highreliability and stability, it is widely used to measure the gas volume in petroleum, chemical,metallurgy and coal industries. In this paper, swirl-meter was detailed studied by means of CFDand experimental methods, the influence of internal structure parameters on flow meterperformance and flow fields were analyzed. Based on the analysis results of orthogonalexperiment and comprehensive balance method, a parameter optimized swirl-meter waspresented. The main contents are as followed:1. The influence of main structure parameters of swirl-meter (incidence angle, throatdiameter, contraction section angle) on the performance (pressure loss and meter accuracy) andthe internal flow field were analyzed, respectively.2. Based on the orthogonal test, the structural parameters including incident angle, throatdiameter, contraction section angle on the performance (pressure loss and meter accuracy) of theswirl-meter was comprehensive considered. Three levels were chosen from each parameter, theparameter combinations with the optimal pressure loss and highest meter accuracy werepresented, respectively; then combined with the integrated balance method, the best parameterswhich had taken both pressure loss and meter accuracy into consideration were obtained.Furthermore, the flow characteristics of prototype and the optimized swirl-meter were bothnumerical analyzed and studied.3. Sonic nozzle gas flow device was used to test the optimal and original model and thepressure loss curves and meter factor curves of the swirl-meter were obtained.