Hi guys,
Im a student studying mechanical engineering, and am currently doing a final year project on flow analysis of air through an impulse turbine. I have never used CFD before up until five weeks ago, I've done alot of research on the software and am kinda getting up to speed.
I'm running the study as an internal flow, with the impulse turbine situated in a pipe. I'm running into difficulty when it comes to setting up the boundaries on my study. I've set the inlet boundary to a volume flow rate of 1.27m3/s. The boundary condition for the outlet says it has to be set at a pressure value (static). How do i avoid setting it to a pressure value, as one of my goals in running the study is analysing the change in pressure of the air as it enters the nozzle and the pressure as it exits the diffuser. If i have the oultet boundary set at amospheric pressure, is that not interfering with the calculations. I have a rotating region set about the blades also.
Good morning, If you set the outlet boundary to atmospheric pressure to run the analysis then when it is done with the CFD study it will show the change in pressure relative to the atmosphere. In essence it is my understanding that it is saying the hole is open when you leave it at atmospheric. If your using floXpress then your limited to what you can actually view as results. Let me know if there is anything else. Thanks