The early GE J79 engines used a longer combustor "can" and dual orifice pressure atomizing fuel nozzles, the nozzles had a single fuel inlet and an external fuel flow dividing valve. Starting with the GE J79-17C engine, the fuel nozzle tip was changed to provide air blast atomization to improve fuel/air mixing. The new fuel nozzle was made longer to compensate for a shorter "can" length that was also developed. The new fuel nozzle was quite complex as it involved the addition of eight radial low pressure secondary fuel distributers. This change was known as "Low Smoke - Long Life Combustor" and it was an improvement for sure.
Interesting, thank you.
I was able to find a pdf about it, are there any pics or cutaways somewhere?
The ones on the report are pretty much useless (at least for me). Here's the file:
www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA095057