الفهرس 
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Abstract
Ejector entrainment ratios are influenced by pressure-driven processes as well as
mixing brought on by interactions between the stream-wise vortex and the
span-wise vortex. This study uses air as the working fluid to offer a numerical
analysis of an ejector operating in a single-phase state. The area ratio of the
constant-area zone to the primary nozzle throat, the mixing chamber diameter, and
the nozzle-exit position (NXP) on the entrainment ratio and the performance of the
ejector were examined in the current study using the bf the computational fluid
dynamics (CFD) technique. Using the same boundary circumstances, alternative
geometric forms are used to explain the impact of the researched parameters. The
experimental data of the static pressure distribution and entrainment ratio, which
are documented in the literature, were used to validate the simulation.
It was found that the difference between the previous experimental data
and the present CFD results for the ejector entrainment ratio are 10.4%,
and 1.5% for the primary pressures of 143.3 kPa and 270 kPa,
respectively. The present results show that the ejector performance is
sensitively affected by increasing the entrainment ratio. The optimal NXP
was at 0 mm as the entrainment ratio value was 3.95, 3.7, and 3.13 at
primary pressure 143.3 kPa, 270 kPa, and 476 kPa respectively. When the
mixing chamber diameter was 39 mm, the entrainment ratio was
maximum values 3.69, 3.5, and 3.1 at primary pressure 143.3 kPa, 270
kPa, and 476 kPa respectively. When the area ratio was 73.3 mm, the
entrainment ratio was maximum values 3.69, 3.5, and 3.1 at primary
pressure 143.3 kPa, 270 kPa, and 476 kPa respectively.