|Potto Home||Contact Us|
Next: The Isothermal Process Up: Rapid evacuating of a Previous: With Fanno Flow Index
The governing equation is
For a choked flow the entrance Mach number to the tube is at its maximum, and therefore . The solution of equation (11.37) is obtained by noticing that is not a function of time and by variable separation results in
direct integration of equation (11.38) results in
It has to be realized that this is a reversed function. Nevertheless, with today computer this should not be a problem and easily can be drawn as shown here in Figure (11.5).
At some point the flow becomes chokeless flow (unless the back pressure is a complete vacuum). The transition point is denoted here as . Thus, equation (11.39) has to include the entrance Mach under the integration sign as
Next: The Isothermal Process Up: Rapid evacuating of a Previous: With Fanno Flow Index Created by:Genick Bar-Meir, Ph.D.
On: 2007-11-21 include("aboutPottoProject.php"); ?>