FIELD: aircraft manufacture. SUBSTANCE: reduction of flow fluctuations in the engine ventilation duct is obtained due to mounting perforated panel at the inlet of purging passage. Perforated panel has round holes with inlet cones or rounded-off leading edges; axes of these holes are inclined towards incoming flow at angle of α<90°. EFFECT: enhanced reliability of aircraft power plant through reduction of loads in reverse gear components due reduction of flow pulsations in engine ventilation duct. 3 cl, 4 dwg
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