Timeline for How to calculate the increase in air speed from a wind nozzle / concentrator?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 25, 2022 at 7:01 | comment | added | Solar Mike | @jessegerritsen check out throat area for M=1 - many textbooks cover sub and supersonic flow, Prandtl-Meyer expansion, Condi nozzles etc All good terms to search for. Not a topic mastered in 5 minutes... | |
| Oct 25, 2022 at 6:59 | vote | accept | jessegerritsen | ||
| Oct 25, 2022 at 6:59 | comment | added | jessegerritsen | Okay thank you. So the flow will never naturally go supersonic given this inlet velocity? | |
| Oct 25, 2022 at 6:57 | comment | added | Solar Mike | @jessegerritsen so you are going from subsonic to supersonic, the power needed will be massive, the forces on the cone huge and you will need to factor in compressibility, friction heating, pressure drop and other factors. As I said about wind turbines above in valleys, try a change in area that is more relevant and think about the results. | |
| Oct 25, 2022 at 6:25 | comment | added | jessegerritsen | What I'm guessing is that there is some kind of back pressure/force that counteracts the inflow of air. | |
| Oct 25, 2022 at 6:12 | comment | added | jessegerritsen | Thank you for your answer. Whenever I do this calculation with for example inlet diameter $D_1=5m$ and outlet $D_2=5cm$, a wind inlet speed of $2.2m/s$ would result in $v_2=\frac{{D_1}^2}{{D_2}^2}*v_1=10000m/s$. I can't imagine this velocity will ever be reached. What am I missing? | |
| Oct 24, 2022 at 12:59 | history | answered | Solar Mike | CC BY-SA 4.0 |