SimScale simulation projects by dtoppenb | Page 1

dtoppenb's profile

Improved simulation with less than 1000s needed to converge. Coarse mesh, pitch up 10 Deg with -5 Deg canard trim. Still need to redo mesh finer as this is too coarse on the leading edges. Used CFD Hex. Prior K & omega fixes in initial values, ux also, plus use potential flow set to yes - converged quickly (1000s). Still running only half-model 40 kts, 0 Deg Roll, now 10 Deg Pitch up, 0 Deg Yaw - need to update to multiple angles pitch first, then full with yaw, roll etc. and speeds upto 400 kts. Need to recheck air properties also - want Denver, summer.  Original geometry, IA04Q02_20191227 updated 20200410.  No props or impulse discs yet.

Improved simulation with less than 1000s needed to converge.  Coarse  mesh Pitch up 10 Deg run.  Still need to redo mesh finer as this is too coarse on the leading edges.  Used CFD Hex.  Prior K & omega fixes in initial values, ux also, plus use potential flow set to yes - converged quickly.  

Still running only half-model 40 kts, 0 Deg Roll, now 10 Deg Pitch up, 0 Deg Yaw - need to update to multiple angles pitch first, then full with yaw, roll etc. and speeds upto 400 kts.  Need to recheck air properties also - want Denver, summer.  Trim canard - nose down pitch now.

Original geometry, IA04Q02_20191227_v1 but now with both PT cowls.  No props or impulse discs yet.

Improved simulation less than 2000s needed to converge.  Coarse 2 mesh ilo 5 is probably too coarse though.  Prior K & omega fixes in initial values, ux also, plus use potential flow set to yes helped.  Need to switch to CFD hex ilo standard though.

Still running only half-model 40 kts, 0 Deg Roll, 0 Deg Pitch, 0 Deg Yaw - need to update to multiple angles pitch first, then full with yaw, roll etc. and speeds upto 400 kts.  Need to recheck air properties also - want Denver, summer.

Original geometry, IA04Q02_20191227_v1 but now with PT cowls, but forgot to calculate forces on front one.  No props or discs yet.

Post processing v1 - note stable solution attained by 1000s or certainly by 1500s given other corrections from prior run - much improved, do not need 3000s.  Key updates were k & omega fixed in initial values, ux also, plus use potential flow set to yes.

Still running only half-model 40 kts, 0 Deg Roll, 0 Deg Pitch, 0 Deg Yaw - need to update to multiple angles pitch first, then full with yaw, roll etc. and speeds upto 400 kts.  Need to recheck air properties also
Original geometry, IA04Q02_20191227_v1 but without the PT cowls or props.

Post processing below - still concerned about convergence.  Some results at downstream lower corner of box look strange, and results spike near end of calculations.   Wonder if I should run longer - more iterations.
Retry at automated mesh - last one (20200330_v1)appears not to have solved properly, or not to have converged.
Still running only half-model 40 kts, 0 Deg Roll, 0 Deg Pitch, 0 Deg Yaw - need to update to multiple angles pitch first, then full with yaw, roll etc. and speeds upto 400 kts.  Need to recheck air properties also
Original geometry, IA04Q02_20191227_v1 but without the PT cowls or props.

Retry at automated mesh - last one (20200330_v1)appears not to have solved properly, or not to have converged.
Still running only half-model 40 kts, 0 Deg Roll, 0 Deg Pitch, 0 Deg Yaw - need to update to multiple angles pitch first, then full with yaw, roll etc. and speeds upto 400 kts.  Need to recheck air properties also
Original geometry, IA04Q02_20191227_v1 but without the PT cowls or props.

Public Profile

dtoppenb's profile