AIRCRAFT DOUBLE-FLOW ENGINE AIR INTAKE MODEL Russian patent published in 2019 - IPC G01M9/08 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, to aerodynamic tests of models of air intakes of double-flow turbojet engines, particularly for research, for example, conditions of vortex formation and ingress of foreign particles into air intake of aircraft engine at starting modes, and other studies at given total air flow rates through the engine in external blowing conditions. Proposed device comprises inner and outer airflow circuits to simulate gas generator and fan circuits of the engine and controllable outer section of flow section of internal circuit controlled from outer panel. Throttle is made in the form of gate valve with possibility of movement along inner loop axis with reduction or increase in flow area of inner loop. Shutter has a conical shape.

EFFECT: technical result consists in providing simulation of an additional parameter – the degree of the engine bypass ratio and possibility of more accurate assessment of the degree of protection of the engine against ingress of foreign objects during testing under conditions of most complete observance of conditions of aerodynamic similarity of the phenomenon of vortex gripping of foreign particles and other investigations with simulation of degree of bypass.

3 cl, 1 dwg