FIELD: creation of vacuum. SUBSTANCE: ejector is provided with supersonic flow conversion chamber whose cross section area ranges from 1.01 to 28 areas of minimum flow section of mixing chamber in zone of its expansion. Supersonic flow conversion chamber is mounted on side of outlet of ejector mixing chamber or on side of outlet of mixing chambers depending on version of ejector. EFFECT: enhanced operational efficiency and reliability of ejector. 4 cl, 3 dwg
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