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FIG. 5.18.16 Predicted venturi performance. (Adapted from S. Calvert, J. Goldshmid, D. Leith, and D. Mehta, 1972, Scrubber handbook, Riverside, Calif.: Ambient Purification Technology, Inc.)

UGt/

The term uGf is the gas velocity at the exit of the venturi, and uGt is the gas velocity in the throat. The term 2 can be estimated from the following equation:

and X is defined as follows:

where Lt is the throat length, and CD is the drag coefficient, which can be estimated up to a flow Reynolds number of about 1000 by the following equation:

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