Flow and heat transfer characteristics of xanthan gum (XG) solutions are experimentally studied to compare the drag reduction (DR) and heat transfer reduction (HTR) behavior in the corrugated tube with that in the circular tube. Effects of XG concentration (C) and bulk velocity (v) on drag enhancement (DE), heat transfer enhancement (HTE) and comprehensive performance index (ξ) in the corrugated tube are also examined. The results show that the DR in the corrugated tube increases and then decreases until becomes negative with increasing bulk velocity under the intense turbulent disturbance of the corrugated wall, which is different from the DR behavior in the circular tube, and the onset of DR is found to occur earlier. In addition, the variation trend of HTR is consistent with that of DR’s absolute value, which is closely related to the interaction between drag reduction property and high viscosity property of XG solutions. Furthermore, the HTE and ξ increase with increasing XG concentration and decreasing bulk velocity, and the maximum HTE and ξ can be up to 25 and 1600, which proves the corrugated tube has a specific applicability in terms of energy saving and heat transfer enhancement for high-concentration XG solutions at low velocity.

通过实验研究了黄原胶（XG）溶液的流动和传热特性，以比较波纹管和圆管中的减阻（DR）和减热（HTR）行为。XG浓度（C）和体积速度（v的影响）还研究了波纹管中的阻力增强（DE），传热增强（HTE）和综合性能指标（ξ）。结果表明，在波纹管壁强烈湍流扰动下，波纹管中的DR随体积速度的增加先增大后减小，直至变为负值，这与圆管中的DR行为不同，发现DR的发生发生得更早。另外，HTR的变化趋势与DR的绝对值一致，这与XG溶液的减阻性能和高粘度性能之间的相互作用密切相关。此外，HTE和ξ随着XG浓度的增加和体积速度的降低而增加，并且最大HTE和ξ可以高达25和1600，