FIELD: mechanical engineering. SUBSTANCE: exhaust has lower part 4 and upper part located opposite each other at some distance between them; they are connected by means of struts 6 bounding open free space 7 forming Venturi tube; it is communicated with hole 8 made in lower part; upper part 5 has form of round cup whose central section 15 is shifted axially and distance between center plane (P) of lower part 4 exceeds circular outer section 16 of this cup. EFFECT: facilitated manufacture and low cost of manufacture. 23 cl, 3 dwg
