FIELD: machine building.
SUBSTANCE: it is proposed to install wedge-like ribs 2 on streamlined surfaces of external rims 1 of flat, conic or annular diffusers. Free external edges of ribs 2 are installed parallel to longitudinal axis of diffuser. Top of wedge-like ribs 2 is located in inlet diffuser cross section at the level of minimum inlet dimension of external rim 1. Internal edges of ribs 2 repeat the profile of external rim 1 of diffuser 1.
EFFECT: enlarging the range of allowable opening angles of flow part of diffusers from the point of view of dynamic loads, and thus reducing their length almost without loss of efficiency.
2 cl, 3 dwg
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