As often happens, while searching on another subject, I came upon this
excellent paper from the Journal of Propulsion and Power on Advanced Rocket
Nozzles, including altitude compensating nozzles.
Some interesting nozzles are in the paper:
RD-0120 Jettisonable Nozzle Insert for Improved Low Altitude Operation
(actually proceeded to hot fire testing, noted here on ARocket previously)
Aerospike and Expansion-Deflection Nozzles (seen many times before)
Dual Throat and Dual Expander Nozzles (some interesting concepts)
Advanced Rocket Nozzles
Hagemann, Van Nguyen, and Dumnov
Journal of Propulsion and Power (Vol 14, No 5, Sept-Oct 1998)
You can download it from here:
https://arc.aiaa.org/doi/pdf/10.2514/2.5354
(Apologies if it's behind a paywall, which might be transparent to me.)
Charles E. (Chuck) Rogers
