convergent-divergent nozzle

convergent-divergent nozzle

[kən¦vər·jənt də¦vər·jənt ′näz·əl]
(design engineering)
A nozzle in which supersonic velocities are attained; has a divergent portion downstream of the contracting section. Also known as supersonic nozzle.

convergent-divergent nozzle

convergent-divergent nozzle
Convergent-divergent nozzle.
An arrangement in which the forward portion of the nozzle is convergent, which increases the pressure of the exhaust gases, while the aft section is divergent to increase gas velocity to the supersonic speed and avoid losses from underexpansion. This arrangement is not very efficient below the design speed.
References in periodicals archive ?
Therefore, it can be concluded that the divergent part of a convergent-divergent nozzle contributes to the choking of initially subcooled flashing flow.
Objective: The expansion of a dilute gas through a gasdynamics convergent-divergent nozzle can occur in three different regimes, depending on the inlet and discharge conditions and on the gas: via a fully subsonic expansion, via a subsonic-supersonic or via a subsonic-supersonic-subsonic expansion embedding a compression shock wave within the divergent portion of the nozzle.
The tunnel was configured with a convergent-divergent nozzle that resulted in a free-stream Mach number of 2.
In order to investigate the influence of the inlet swirl on the nozzle restrictiveness and visualize the two-phase flow expanded in the convergent-divergent nozzle, a transparent nozzle with controllable swirl at the nozzle inlet has been designed and manufactured, as shown in Figure 6.
A pumped-refrigerant-loop was used for adjustment of test conditions to investigate the influence of inlet swirl on the two-phase flow expanded in the convergent-divergent nozzle.
Figure 10 shows visualization of the flow expanded in the convergent-divergent nozzle.
A convergent-divergent nozzle utilizing swirl control was designed and manufactured for experiments with R134a.
Shock associated noise of supersonic jets from convergent-divergent nozzles, Journal of Sound and Vibration 81(3): 337-358.