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- Title
EFFECT OF INTERNAL PYLONS ON THE PARAMETERS OF THE JET FLOW IN A NOZZLE WITH A CENTRAL BODY.
- Authors
Kiselev, N. P.; Kavun, I. N.; Zapryagaev, V. I.; Styazhkin, R. A.
- Abstract
A high-velocity flow in an axisymmetric nozzle containing a central body and pylons is studied. The influence of the geometry of the main and additional pylons on the gas-dynamic and thrust characteristics at the nozzle exit in the flow regime with ( is the ratio of the pressure in the settling chamber to the ambient pressure) is determined. Azimuthal nonuniformity of the flow at the nozzle exit is detected. The maximum azimuthal nonuniformity is observed in the wake behind the pylons. It is shown that a three-dimensional transonic flow is formed in the nozzle duct with the pylons mounted in the minimum free cross section; local supersonic regions closed by weak shock waves are formed in this flow. It is found that the formation of such a shock wave structure is responsible for nozzle thrust reduction by 12%.
- Subjects
JETS (Fluid dynamics); JET nozzles; SHOCK waves; THREE-dimensional flow; AXIAL flow; TRANSONIC flow; NON-uniform flows (Fluid dynamics)
- Publication
Journal of Applied Mechanics & Technical Physics, 2023, Vol 64, Issue 6, p1058
- ISSN
0021-8944
- Publication type
Article
- DOI
10.1134/S0021894423060160