A two phase analysis of orifice based on a non-dimensional number

Abstract

Analysis of an orifice flow with two-phase is an important topic for research. The various applications of orifice is two-phase (vapor-liquid) flow analysis are in petroleum industry, processing industry, chemical plants, power plants and refrigerating plants. Due to turbulence phenomena in two-phase the flow measurement produces error in the orifice measurement. The present study considered a circular orifice and air-water as two-phase mixture to find out pressure drop (Δp). The put in constraints are considered, Reynolds number, (Re), volume fraction (X), area ratio (σ) and space ratio (τ) for the study. The range for input parameters are Re up to 100000, X = 0.2–0.8, σ = 0.3–0.7, τ = 0.1–0.9. The τ is considered as per the thickness of orifice as thin and thick. Based on the numerical prediction results a number of correlations developed to give a better comparison study. To minimize the error a non-dimensional number, (Orifice Number as ON) introduced with correlations to know the effect on Δp. ON is a non-dimensional number defined as a combination of σ and τ. The study will be a good contribution to the two-phase analysis of flow measurement through orifice flow.