Method of designing single-channel pump and single-channel pump

A method of designing a single-channel pump comprising a volute configured to provide a turning channel to a fluid introduced from the outside, and an impeller configured to rotate and having a single channel through which the fluid having passed through the volute passes, the method comprising:

• a first step of determining a shape of the volute and setting a plurality of points inside and outside the volute;
• a second step of selecting a target value, which is a value for a performance numerical value of the single-channel pump, and determining a shape of the impeller suitable for the target value;
• a third step of setting an analytical cross-sectional area, which is a channel cross-sectional area that adjoins inner and outer points in the volute, and setting a plurality of analytical cross-sectional areas for a plurality of portions in the volute, wherein each analytical cross-sectional area includes one inner point and one outer point that are adjacent to each other and are positioned on an axis of the volute in a diameter direction, and the plurality of analytical cross-sectional areas are formed in a flow direction of a fluid passing through a spiral part of the volute;
• a fourth step of setting a structure design variable, which is a structural variable of the single-channel pump, and deriving the target value by a numerical analysis;
• and
• a fifth step of deriving, as a design plan, a structure design variable value that is a value of the structure design variable that allows the target value to satisfy a preset set target value, wherein the numerical analysis is performed on the plurality of analytical cross-sectional areas and computation is continuously performed until the target value satisfies the preset set target value.