![]() ![]() it has far smaller internal energy than steam to supply energy to working fluid at venturi to increase velocity by switching PE to KEĪn interesting point. The outer diffuser tube at the tube at the downstream of the venturi throat then typically expands in order to decrease the velocity of the ejected stream, allowing the pressure to smoothly increase to the external pressure. The outer converging-diverging tube of ejector then narrows into a mixing section where the high velocity working fluid mixes with the fluid that is drawn in by the vacuum, imparting enough velocity at the venturi throat by converting the potential energy of the working fluid into kinetic energy for it to be ejected. This causes the secondary gas to move out of the vessel or equipment and enter into the suction chamber through a suction inlet. Due to the high velocity of steam through the nozzle, a low-pressure region is created in the suction chamber. During the working process, the working fluid is expanded. The nozzle converts the high-pressure steam into the high-velocity stream which is due to Bernoulli's principle. The high-pressure steam first passes through the steam chamber and enters the suction chamber through the nozzle. This increased pressure allows the exiting gases to get out of the ejector smoothly. Here the mixed gas velocity reduces as there is an expansion of gases and there is an increase of pressure. This is taken care of by the diverging section of the diffuser. However, the pressure of mixed gases falls. ![]() The vacuum is maintained since there is no fall of velocity. Steam converts its potential energy to kinetic to reach the highest velocity. The diffuser or the converging-diverging throat gives a booster dose of velocity to the mixed gases. The velocity of steam falls while the velocity of secondary gases increases. In the converging part of the outer tube steam and secondary gases from the equipment mix. The low pressure sucks the secondary gases from the vessel. While steam velocity increases its pressure falls as it expands creating a low-pressure region around the nozzle. High-pressure steam enters through the nozzle and expands at the tip of the nozzle. The steam ejector has two parts a converging nozzle and an outer converging-diverging tube. ![]()
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