要約

The possibility of enhancing heat transfer from a symmetrical inline 1.45 × 1.45 bank of smooth tubes with the outer diameter d₁ = 11 mm in a crossflow with smooth cylindrical turbulizing rods of diameter d₂ = 1.2−4.5 mm disposed inside the bank successively at the centers of squared tubular cells is analyzed. The implementation of the proposed arrangement of tubular elements in the form of a combined heat-transfer surface of tube banks of different outer diameters d₁ = 11 mm and d₂ = 6 mm with a triangular one with d₁ = 11 mm and d₂ = 8 mm with a linear arrangement and experimental thermal and aerodynamic characteristics obtained on their basis point to the expediency of practical application of the proposed approach to heat transfer enhancement and increase of the energy efficiency of tubular heat exchanging apparatus and facilities. Various variants of the design of a tubular surface in a crossflow are presented.