Wet gas measure by tapered tube variable area ring orifice

Guomin Xue; Yi Shen

doi:10.1117/12.808402

12 January 2009 Wet gas measure by tapered tube variable area ring orifice

Guomin Xue, Yi Shen

Proceedings Volume 7133, Fifth International Symposium on Instrumentation Science and Technology; 71331N (2009) https://doi.org/10.1117/12.808402
Event: International Symposium on Instrumentation Science and Technology, 2008, Shenyang, China

Abstract

Great difficulties exist in wet gas flow measuring by means of standard orifice plate since the rangeability can only reach 3:1, with serious pressure loss plus liquid aggregation near the upstream orifice plate. Therefore, it is necessary to improve the structure of the standard orifice plate. This paper presents a sort of tapered tube variable area ring orifice device for wet gas measure, which is designed structurally by combination of a tapered tube, an inner circle-shaped movable baffle, a precision spring and a displacement sensor. Accordingly, a wet gas flow equation is shown that features the substitution of displacement for pressure difference. The rangeability can be as large as 15:1 in the case that the area ratio of the variable flow path is designed to be 5:1. The hydromechanical numerical simulation results indicate that both rate field and pressure field inside the device are stable and the pressure loss is one-third of the standard orifice plate. Further, the problems of liquid aggregation and pressure ducts block are avoided.H

Citation Download Citation

Guomin Xue and Yi Shen "Wet gas measure by tapered tube variable area ring orifice", Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71331N (12 January 2009); https://doi.org/10.1117/12.808402

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