The Influence of Sudden Cross Section Change on Two Phase Flow Characteristics

Abstract

This research study the influence of the solid loading ratio & Reynolds number onminor losses coefficient and pressure coefficient for sudden expansion region fortwo-phase flow type gas-solid through an orifice by preparing an apparatus withsolving the mass , momentum , Bernoulli equations mathematically .An expansion area was chosen with flow cross-section changing from small tolarge with area ratio (5.8) & diameters ratio (2.4) to study the changes which occuron minor losses coefficient and pressure coefficient with different loading ratio (0)to (1.645) . Test a different mixture flow-rates (1.02-7.8) kg/min to find theinfluence of Reynolds number with ranges of (42863) to (75909) on minor lossescoefficient and pressure coefficient .It was found that the increase in solid loading ratio reduced linearly the minorlosses coefficient and pressure coefficient for sudden expansion region , also theydepend on (Re) but with little effect .