supertrinity:
Confront reality.
Some of the best engineering minds you could attract - such as Milton Beychok, Torricelli, etc. - are leveling with you. If you "have to find the best way to design an ejector" you have probably stumbled into the best, practical, and experienced engineering recommendations from these fellows.
Face the facts. No one - even you - is going to have any serious engineering faith in your first ejector design. Obviously, you've never designed one before; that's why you're probing for help. It takes money, money, & probably more money to develop a credible, reliable, and recommended design of an ejector. And then after going through all this, you have to confront a worse reality: there are already existing, recognized, proven, reliable ejector suppliers out in the market place. Why would you consider it worth your while to complete with the likes of Graham, Penberthy, etc.? This doesn't make engineering sense. Heed Milton Beychok's advise...... that makes engineering sense!
Art Montemayor
Spring, TX