This work presents a parallel flow shell and tube heat exchanger with a novel clamping plate baffle and polyhedral longitudinal vortex generator (PLVG) in shell side. The parametric effectiveness of geometric parameters (width, height, pitch and attack angle) of PLVG on turbulent thermal performance is numerically explored using the Taguchi method to carry out the parameter optimization. The flow structure and heat transfer mechanism of PLVG is presented and revealed. The results show that the PLVG has a higher PEC than the equilateral triangle cross sectioned wire coil (ETWC) and sinusoidal wavy tape (SWT). The sequence of the parametric effectiveness for the Nu and PEC is PLVG height > attack angle > width > pitch, for the f is PLVG height > width > attack angle > pitch.

这项工作提出了一种平行流壳管式换热器，在壳侧具有新型夹持板挡板和多面体纵向涡流发生器（PLVG）。利用Taguchi方法对PLVG的几何参数（宽度，高度，螺距和迎角）对湍流热性能的参数有效性进行了数值研究，以进行参数优化。介绍并揭示了PLVG的流动结构和传热机理。结果表明，PLVG的PEC高于等边三角形截面线圈（ETWC）和正弦波状胶带（SWT）。Nu和PEC的参数有效性的顺序为PLVG高度>迎角>宽度>螺距，对于f 是PLVG高度>宽度>迎角>俯仰角。