Hydrodynamics of liquid jet ejector

FIGURE 8.5 Ejector assembly with beU-shaped entry, mixing tube, and pressure recovery diverging section. (Reproduced from Bhutada and Pangarkar (1987) with permission fiom Taylor Francis Ltd. Copyright 1987 Taylor Francis Ltd. http //www.tandfonUne.com/ 

For applications of the ejector as a contacting device, Bhutada and Pangaikar (1987) defined the ejector efficiency as follows  

Since the term is not relevant in the application of the ejector as a gas-liquid contacting device, Equation 8.2 was further simplified as 

Since is equal to power supplied through the primary fluid, Equation 8.3 

The devices used by the initial investigators had relatively very low ( 10%) efficiency likely due to their very low rates of induction (or low QJQ - Witte (1962, 1965,1969) pointed out that the large gas-liquid interfacial area provided by liquid-propelled gas ejector is a major advantage in their use as gas-liquid contactor. Witte (1965) described the remarkable phenomenon of mixing shock initially observed by von PaweU Ramingen as early as 1936. This phenomenon converts an initial jet 

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C. M. van Dierendonck, L. L., Hydrodynamics and mass-transfer characteristics of a loop-venturi reactor with a downflow liquid jet ejector. Chem. Eng. Sci. 1992, 47 (13/14), 3557-3564. 

Indicates the relative importance of reaction and diffusion for a given hydrodynamic situation in multiphase system Prediction of mass ratio of secondary and primary fluid in a liquid jet ejector (Chapter 8)... 

Dutta NN, Raghavan KV. (1987) Mass transfer and hydrodynamic characteristics of loop reactors with down flow liquid jet ejector. The Chem. Eng. J., 36 111—121. 

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