A round air duct is more economical than a rectangular air duct. It requires less material to produce. Since with equal areas for a circle and a rectangle, the circumference will be less than the sum of the lengths of the sides of the rectangle. Also, aerodynamic losses in a round duct will be less than in a rectangular one. However, the design of round ducts and gas ducts is more difficult than rectangular ones. The program on this page of the site will calculate the unfolded lateral surface of the tapered increaser with offset axes according to the first computation option (with an accessible vertex).
Unfolded lateral surface of the tapered increaser with axes offset.
It is cut out on sheet metal with further circular rolling.
Sheet thickness (s)
mm
Height of tapered increaser (H)
mm
Offset of axes of bases (C)
mm
Outer diameter (D) of larger base
mm
Outer diameter (d) of smaller base
mm
Number (n) of split points
point