الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Venturis are found in operation in petrochemical, refining, gas pipeline, metals, water and power plants since 1964. They are used wherever lowpressure loss, high accuracy, piping restrictions or fluids containing solids are encountered. Venturi-meters are known for their accuracy, reliability and longevity. They provide a wide variety of measurement and offer a high degree of accuracy while using very little energy. The main objective of this work is to study experimentally the effect of the different types of parameters that affect on the flow behavior of gas-solid mixture in a Venturi and construction of the suitable experimental test rig that helps to study the effect of these different flow parameters. An experimental study is conducted on the selected Venturi meter models to determine the effect of operational and geometrical parameters, and to seek a viable method for determining loading ratio for suspended gas-solid flows in the Venturi. Experiments are carried out over the available range of primary flow stagnation pressures and corresponding primary and total air mass flow rates. The results show that Stokes number and loading ratio greatly affect metering of gasparticles mixture in the Venturi meter. However, inlet and exit geometries have smaller effects compared to Stokes number and loading ratio. Inlet geometry modification improves the Venturi pressure sensitivity to solids loading. Furthermore, changing the exit geometry enhances the pressure recovery. Seven nonstandard Venturi-meters with different diameter ratios (throat diameter to inlet diameter) and throat lengths are designed for laboratory experiments that are conducted in the heat engine laboratory, faculty of engineering, Menoufia University. Metering correlations that are deduced from the experimental results give good predictions to both loading ratio and pressure recovery of the investigated nonstandard Venturi meters for the tested cases.