GAS-DYNAMIC PRESSURE CHAMBER Russian patent published in 2022 - IPC G01M9/00 

FIELD: experimental aerogasdynamics.

SUBSTANCE: invention relates to experimental aerogasdynamics and relates to the determination of gas dynamic loads on models of aircraft (AC) with operating propulsion systems (PS) when separating high-altitude steps. The gas-dynamic pressure chamber (HDPC) contains a vacuum chamber, systems for vacuuming, control, measurement and gas supply with a gas supply pipeline, an active aircraft model with a nozzle block for simulating the jets of an operating propulsion system, and a passive model with a force measuring device connected to the measurement system and mounted on the holder of the coordinator. The coordinator is located on the service platform fixed in the working area of ​​the vacuum chamber. The gas turbine engine is equipped with a rigid frame for vertical fastening, made according to the shape of the aft part of the separating stage of the active model. A compact force-measuring device is placed in the cavity of the front part of the passive model, made in the form of a thin-walled shell in the form of a detachable stage with a truss and elements of the interstage compartment.

EFFECT: reducing the influence of deformations and vibrations of the structure during evacuation and "shock" start of the model PS, providing the possibility of testing at small distances between separating stages, reducing the influence of moment loads on the result of measuring forces.

3 cl, 5 dwg