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Next: Filling/Evacuating The Chamber Under Up: Rigid Tank with Nozzle Previous: Rigid Tank with Nozzle   Index

The mass flow out is given by either by Fliegner's equation (4.46) or simply use and equation (11.17) becomes

It was utilized that and definition is simplified as . It can be noticed that the characteristic time defined in equation (11.5) reduced into:

Also it can be noticed that equation (11.12) simplified into

Equation (11.20) can be simplified as

Equation (11.23) can be integrated as

The integration limits are obtained by simply using the definitions of reduced pressure, at and . After the integration, equation (11.24) and rearrangement becomes

Solution

The characteristic time is

And for smaller area

The time is

Substituting values into equation (11.27) results
 (11.33)

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Next: Filling/Evacuating The Chamber Under Up: Rigid Tank with Nozzle Previous: Rigid Tank with Nozzle   Index
Created by:Genick Bar-Meir, Ph.D.
On: 2007-11-21