[Umarahmad12]

Hello, firstly thankyou for taking the time to read this!
I am fairly new to CFX and indeed ANSYS, I am trying to model a flow involving an Ejector Nozzle, it is derivative work based on some validation studies undertaken by NASA in the early 1990's. The Ejector Nozzle is comprised of a converging diverging nozzle with a smaller primary nozzle at the inlet as can be seen by the accompanying picture. The original work that I am basing this simulation on states that the flows involved are all less than a mach number of 0.3 at the inlet, obviously indicating that the flows are incompressible. However, the original work also states that the two inlets are not just at differing mach numbers, but also differing temperatures and pressures, after leaving the primary nozzle exit the two fluids enter a mixing chamber where the pressure and temperature of the mixed fluid changes. My question is essentially, is it possible to simulate such a flow?... that is incompressible and has changing temperatures and pressure. Or is it safe to assume that the mach numbers will increase to a level of 0.3 and above when passing through the diverging section of the nozzle?

Any help that could be offered to me on this simulation would be greatly appreciated!!

The original work can be found at this web address:

http://www.grc.nasa.gov/WWW/wind/valid/eject/eject.html

Thanks in advance guys!