![gas ejector design calculation gas ejector design calculation](https://media.springernature.com/original/springer-static/image/chp%3A10.1007%2F978-3-319-75244-0_3/MediaObjects/394673_1_En_3_Fig15_HTML.gif)
Multi-stage steam jet vacuum pumps are used to produce vacuum in evaporators, driers, distillation plants, rectifying, freeze drying, poly-condensation, degassing, deodorizing plants etc. Liquid jet ventilators type fv1 are based on proven jet pump technology and often used to draw off air, gases or vapor. Liquid jet vacuum pumps with threaded connections are mainly used in chemical laboratories for the production of vacuum, for example in vacuum distillation or drying. Liquid jet solids pumps are based on proven jet pump technology and often used to convey types of solids. Liquid jet mixers type fm1 are based on proven jet pump technology and often used to mix and circulate liquids. Liquid jet liquid pumps are used for conveying and mixing liquids such as water, acids or lye in water and waste water treatment plants. Liquid jet gas compressors type fgv1 are based on proven jet pump technology and often used for the conveyance and compression of gases at simultaneous mixing with the motive liquid. Laboratory steam jet vacuum pumps type ldp1 are based on proven jet pump technology and often used as vacuum producers in chemical laboratories, for pilot plants and in small production plants. Multi-stage steam jet vacuum pumps in graphite for corrosive applications. Gas jet ventilator type gv1 are based on proven jet pump technology and often used to draw off vapors from working areas, to ventilate tanks, circulate air etc.
![gas ejector design calculation gas ejector design calculation](http://oaktrust.library.tamu.edu/bitstream/handle/1969.1/ETD-TAMU-3206/LIAO-DISSERTATION.pdf.jpg)
Gas jet vacuum pumps are based on proven jet pump technology and often used to evacuate pipelines, vessels, and plants. Gas jet compressors are based on proven jet pump technology and often used to mix and compress gases.
![gas ejector design calculation gas ejector design calculation](https://ars.els-cdn.com/content/image/3-s2.0-B9780128195048000020-f02-26-9780128195048.jpg)
Combined Steam Jet and LRVP SystemsĬombined Steam Jet and LRVP Systems are based on proven jet pump technology and often used to create and maintain the vacuum. In the following sections, a few simple design tools will be presented, while the potential offered by up-to-date CFD techniques will be resumed in the following chapter.Air jet vacuum pumps type lvp1 are based on proven jet pump technology and often used when no steam is available as motive medium. Probably, a hybrid approach combining a first scrutiny of possible configurations and a subsequent CFD analysis could be an answer. Eventually, the design may be modified in order to mitigate any problem that could be revealed by the CFD results, but there is no way to state that all possible design options have been explored. The complete geometry of the ejector must be known in advance before any CFD analysis is attempted. However, it must be stressed that CFD is not a design tool. The only way to get a complete picture of the flow field is to analyze the ejector by a Computational Fluid Dynamics (CFD) approach. Indeed, a detailed analysis of the influence of geometrical details on the supersonic flow is not feasible with analytical tools. The effect of other details, like the presence of fillets between conical and cylindrical parts, is also neglected. Other elements, like the mixing zone length or the angle of the secondary flow inlet, are left to the experience of the designer. In many cases, ejectors are designed in a rather empirical way, and the only elements of the ejector geometry that receive a calculation effort are the main flow sections. Ejector design may be performed at various levels of complexity.