A First Pass at Modeling Horn 3 L. Bartoszek Bartoszek Engineering 12/10/04

Elevation view of horn 3 with 183 cm tall man for scale Need z dimension for placement of striplines through support module

Isometric view looking downstream

View looking downstream along axis of horn Need this dimension too to fix the ear and stripline design

View looking upstream along axis of horn

Isometric view looking upstream

Close-up of upstream end of horn M10 bolts 52 M16 ceramic washer assemblies I did not put in all the bolts holding the ears to the horn yet

Horn without stripline or ears

Outer Conductor rendered transparent

Inner Conductor fully welded

Man next to ceramic ring

Concern about previous picture That is the largest ceramic ring I’ve 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.

Coss-section showing approximate pattern of vee nozzles

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.

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 round—only analysis will tell.