Spring-wire has been recently suggested as a turbulator for curved based helical and spiral tubes because of its flexibility nature. Spring-wire can be fabricated by twisting a wire around a rod. However, common circular wire is the only one normally employed in the fabrication process of the spring-wire while the outcomes of this research show that the other wire cross-section shapes can provide much higher thermal performance and Nu number. Novel wire cross-sections for such as triangular, hexagonal, square, and rectangular are numerically simulated in this research (see graphical abstract). All recommended shapes are evaluated from frictional, exergetic and thermal viewpoints for a selected range of Dean number. Nu number of triangular cross section is almost double compared to the common circular cross section. Pressure drop also increases which can be considered as an important criterion depending on the application of the heat exchanger. Interesting thermal-fluid behavior are found through the spiral pipe under the mentioned spring-wire turbulator all of which are reported in this paper.