REDUCING PIECE WITH DROP-SHAPED BIOMIMETIC KNOBS Russian patent published in 2023 - IPC F15D1/06 

FIELD: hydraulic power engineering/

SUBSTANCE: reducing piece with drop-shaped biomimetic knobs (1) has a number of drop-shaped knobs (3) uniformly distributed along the perimeter of leading edge (2) with a spacing of m=1.5D_n, where D_n is the diameter of the cross-section of the body of the knob. The frontal part of knobs (3) protrudes forward by 0.25l of the length of the body of knob (3). The tapering parts of knobs (3) are superimposed on working side (4) of reducing piece (1). The total length of knob up (3) is l=2D_n. The cross-sectional diameter D_n of the knob is 0.04D_in of the inlet diameter of reducing piece (1). The number of knobs (3) depends linearly on the inlet diameter D_in of the reducing piece (1).

EFFECT: reduced hydraulic losses in the reducing piece.

1 cl, 4 dwg