Try this:
AIAA-2004-3923
NOZZLE SELECTION AND DESIGN CRITERIA
Eric Gamble*
Dwain Terrell, P.E.
Rich DeFrancesco
SPIRITECH Advanced Products, Inc.
You can use equation (2) to calculate the nozzle area you require with or without afterburner - just plug in the appropriate flow quantities.
Last edited by CliveL; 17th Feb 2013 at 05:02.