Name: Elias Antonio Gomes Coelho Marochio
Type: MSc dissertation
Publication date: 16/12/2016

Namesort descending Role
Marcio Ferreira Martins Advisor *

Examining board:

Namesort descending Role
Harerton Oliveira Dourado External Examiner *
Marcio Ferreira Martins Advisor *
Rogério Ramos Internal Examiner *

Summary: Flow measurement systems for differential pressure are widely industrial solutions, with the orifice plate being the oldest element but still widely used. The accuracy of these systems is a fundamental requirement due to increasing demands of standards, regulations and the requiriment to reduce production costs. In single-phase flow, the parameters for flow measurement are well-defined. However, in wet gas flow, the conditions are changed due to the presence of a liquid phase in the gas flow, causing an overreading in the gas measurement. This paper proposes an evaluation of empirical correlations for gas flow correction, and an analysis of the influence parameters using the Computational Fluid Dynamics (CFD). The evaluation of four correlations was performed using the experimental data from Murdock (1962), and then compared with each other. The James (1965) correlation showed higher accuracy for the steam-water flow, and the Murdock (1962) correlation for air-water and natural gas-water, besides an evaluation of the operating conditions of these correlations was performed. Furthermore, this paper also compared the influence parameters via the CFD to neglected by empirical correlations, being observed that the parameters diameters ratio, liquid Froude number (Frl) and the operating pressure influence overreading.

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