Some steam Jet ejectors are designed with a nozzle extension. What is the role of this extension in the ejector performance? During the last shutdown of our VDU, we noticed that the first (and largest) ejector steam nozzle was mounted without such an extension.
How could this impact on the ejector performance?
Alan Goelzer, Jacobs Consultancy, firstname.lastname@example.org
Not sure what is considered 'nozzle extension' without a schematic. Steam jet ejectors are supposed to have an expansion tail pipe after the throat which swages up at 14 degree included angle until the velocity and fluid momentum are back in the 'normal range' for entry into a surface condenser.