A First Pass at Modeling Horn 3

1
A First Pass at ModelingHorn 3

• L. Bartoszek
• Bartoszek Engineering
• 12/10/04

2
Need z dimension for placement of striplines
through support module
Elevation view of horn 3 with 183 cm tall man
for scale
3
Isometric view looking downstream
4
Need this dimension too to fix the ear and
stripline design
View looking downstream along axis of horn
5
View looking upstream along axis of horn
6
Isometric view looking upstream
7
Close-up of upstream end of horn 3
52 M16 ceramic washer assemblies
128 M10 bolts
I did not put in all the bolts holding the ears
to the horn yet
8
Horn without stripline or ears
9
Outer Conductor rendered transparent
10
Inner Conductor fully welded
11
Man next to ceramic ring
12
Concern about previous picture

• That is the largest ceramic ring Ive ever seen.
• I recommend making a part drawing for it and
  sending it out to Japanese and US ceramics
  vendors for their comments.
• Handling this ring will require some special
  tooling to avoid cracking from bending stress.

13
Coss-section showing approximate pattern of vee
nozzles
14
Concern about previous picture

• The standard 110 vee spray nozzles may be too
  diffuse to get good heat transfer at the small
  radius of the center of the horn (neck).
• May need sharper, more circular nozzles to direct
  spray at the neck of the inner conductor.

15
Conclusions

• Need more dimensions to finalize the stripline
  and ear designs
• This horn is the original geometry Ichikawa sent
  me, not reduced by 90 mm (to be able to make
  flanges from available stock).
• Large flanges may be made by forged rings
• I am slightly concerned about the relatively thin
  wall of the outer conductor leading to large
  tolerances/deflections from circularity
• Flanges add stiffness and may keep OC roundonly
  analysis will tell.