convergent divergent nozzle

convergent divergent nozzle

when the cross section of nozzle first decreases from its inlet to throat and then increases from its throat to exit is called as convergent divergent nozzle

1. the smallest a cross section area of convergent divergent nozzle is called as a throut
2. for pressure ratio less than critical pressure ratio a divergent part is Nick in addition to conversion path to obtain for the pressure drop and he to drop to accelerate the floow to Supersonic speed
3. the divergent part is to be longer than convergent part because the divergent angle is limited to about 7 degree to prevent separation at the wall
4. the design of correct area at the throat and exit of the nozzle is very important as the flow through the nose I will be depend on the size for given pressure drop
5. nosal are alway designed to discharge maximum mass for given conditions