[khoddami]

hi sir,

i am designing a kaplan turbine with a prescribed head and volume flow rate with a specific efficiency

i have done basic design in matlab by a code and obtained required radius, inlet and outlet blade angles,stagger angles and axial chords for both inlet guide vane and runner blades

i decided to apply 4 runner blades and for each 3 guide vane blades

then i exported generated domains to turbogrid and generated a structured mesh with a good quality by it.

and finally exported the mesh into cfx-pre and adjusted the relevant settings in cfx(for example angular velocity,b.c. and interfaces and expressions definitions).

my problem is i get a power much larger than that i should and that is my design value)

i have seen many videos on youtube and they did not work.

i ask you to help me if you can.

regards

[ghorrocks]

FAQ: https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F