User:RedHotIceCube/Expansion Deflection Nozzle

The expansion-deflection nozzle is an advanced rocket nozzle which achieves altitude compensation through interation of the exhaust gas with the atmosphere, much like the plug and aerospike nozzles.

Description
It appears much like a standard bell nozzle, but at the throat is a 'centrebody' which deflects the flow towards the walls. The exhaust gas flows past this in a more outward direction than in standard bell nozzles while expanding before being turned towards the exit. This allows for shorter nozzles than the standard design whilst maintaining nozzle expansion ratios. Because of the atmospheric boundary, the atmospheric pressure affects the exit area ratio so that atmospheric compensation can be obtained up to the geometric maximum allowed by the specific nozzle.

Development Issues
Atmospheric compensation ability
 * wake excavation (startup transient?)
 * atmospheric column surrounded (cut-off) as rocket accelerates

Inviscid flow

Thermal issues (but less than plug/aerospike)