NOZZLE BLOCK OF A WIND TUNNEL WITH A PROFILED NOZZLE AND A METHOD FOR ITS MANUFACTURE Russian patent published in 2021 - IPC G01M9/00 B33Y80/00 B33Y10/00 

FIELD: experimental aerodynamics.

SUBSTANCE: invention relates to the field of experimental aerodynamics, in particular to wind tunnels and impulse gas-dynamic installations such as shock tubes, allowing to implement experimental modeling of flight conditions of high-speed aircraft in the upper atmosphere and in outer space. The nozzle block consists of replaceable and stationary sections, while the stationary sections are flanges with an end nut, the wall plane of which is perpendicular to the direction of propagation of the incident flow in the low-pressure chamber of the shock tube, and the replaceable section is a directly profiled nozzle, which is fixed between the flanges. The inlet section of the profiled nozzle is located in the oncoming flow formation section, the outlet section is located in the working section, and a protrusion is made on the outer side of the nozzle along the entire section.There are symmetrically located holes on the flanges for fixing the nozzle block, and a diaphragm is located between the end nut and the profiled nozzle. The profiled nozzle is made of polymer material by 3D printing.

EFFECT: technical result consists in expanding the range of technical means, the ability to create a flow running on the investigated model with a specific distribution of gas-dynamic parameters and to reduce labor and material costs for the production of nozzles.

5 cl, 6 dwg