BENCH FOR BYPASS TURBOJET ENGINE ALTITUDE TESTS Russian patent published in 2011 - IPC G01M15/14 

FIELD: engines and pumps.

SUBSTANCE: proposed test bench comprises suction shaft and pipeline with adjustable throttle to feed dries and cooled air, climatic test bench witt separation baffle accommodating adjustable throttles of altitude and speed fine adjustment and tested engine with its input connected via labyrinth seal to flow rate manifold with lemniscates nozzle and protective screen on ball-like carcass. Note that flow rate manifold is secured to climatic test bench fixed stops. Pipeline with aid flow equaliser is mounted at climatic test bench inlet. Process air exhauster is arranged at climatic test bench outlet. Exhaust ejection nozzle is arranged on separation baffle, nozzle inlet section being stopped by disk with central opening that receives engine nozzle. Ejection nozzle diameter corresponds to flow rate of air passing through engine and makes 2-2.5 of nozzle diameter while clearance between ejection nozzle and outlet section makes 0.5 mm.

EFFECT: higher accuracy of engine thrust measurement, expanded measurement ranges.

3 cl, 4 dwg