Nels:
The Indian’s have published extensively on this topic for air to air
missiles.
A “scalloped” rocket nozzle appears to offer the best entrainment but the
net effect is not significant in their testing compared to legacy missiles.
Bill
On Thu, Feb 11, 2021 at 8:38 AM Nels Anderson <nels.anderson@xxxxxxx> wrote:
On 2/11/21 4:38 AM, Dr Edward Jones wrote:
In the early 1950s, Wilmot and Mansour of Jetex in Totten, nearFrom first principles, it seems not implausible. Without the augmenter
Southampton UK, expanded their line of reloadable solid rocket motors
for aeromodels, with thrust from 1/2-oz up to 6-oz, burn times around
15-20 seconds. Jetex came up with "augmenter tubes" to fit around the
exhaust and increase thrust.
...
I remain skeptical of this thrust augmentation. What's your opinion?
tube, a considerable amount of thermal energy in the hot exhaust jet is
likely wasted. If ambient air is mixed into the exhaust as a working
fluid, then it will expand, conceivably generating additional thrust.
Kinda like using a turbofan rather than a straight turbojet.