- The vacuum used in steam jet air ejector pumps works via the Venturi effect. This effect refers to fluid reduction that occurs when the fluid flows through a constricted channel, in this case a section of pipe.
- High pressure steam passes through the injector inlet and compresses via a converging-diverging nozzle, or tube that pinches in the middle. The vacuum increases the velocity of the steam, converting its pressure into velocity energy. Once the steam passes the middle of the tube and enters the less constricted end it expands and reduces speed, reverting the velocity energy back into pressure energy.
- Steam jet air ejectors are used to generate pressure in steam turbine exhaust compressors. They also produce vacuums in steam jet cooling systems.
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