![water ejector design calculation water ejector design calculation](https://amarineblog.files.wordpress.com/2017/07/3.png)
When the suction fluid starts to mix with the motive fluid in the mixing chamber. Due to this suction fluid “C” (air or gas) from the connected vessel moves toward the mixing chamber “D”. The motive fluid will create a vacuum in the mixing chamber refer to to the pressure curve where the pressure is decreased and velocity is increased.
![water ejector design calculation water ejector design calculation](http://jingweizhu.weebly.com/uploads/1/3/5/4/13548262/9145716_orig.png)
Refer to the below figure, a high pressure motivating fluid enters at “A” and expands through the converging-diverging nozzle to “B”. The suction line of the ejector is connected to the vessel which is to the kept under low pressure. In mixed fluid enter the diverging portion of the ejector where its velocity energy is converted into pressure energy. Due to the low-pressure zone, the suction fluid will start to move toward it and mix with motive fluid in the mixing chamber. Due to the pressure drop of the motive fluid, it will create a low-pressure zone before the mixing chamber. The operating principle of the ejector is the pressure energy in the motive fluid is converted to velocity energy by an adiabatic expansion in the Converging/Diverging Nozzle. The operating principle of the ejector is the pressure energy in the motive fluid is converted to velocity energy by an adiabatic expansion in the Converging/Diverging Hence it is relatively low-cost and easy to operate and maintenance-free equipment. The major difference between the ejector and vacuum pump or compressor is it had no moving parts. An ejector is similar to a vacuum pump or compressor. An ejector is a device used to suck the gas or vapour from the desired vessel or system.