陕西科技大学学报（自然科学版）2007，Vol.25Issue(2)：42-46,5.
管壳式换热器中旋流片强化管外传热的数值模拟
NUMERICAL SIMULATION OF HEAT TRANSFER ENHANCEMENT BY TWISTED LEAF IN SHELL SIDE OF SHELL-AND-TUBE HEAT EXCHANGER
摘要
Abstract
As a new type of heat transfer augmentation element, twisted-leaf tube bundle support was conducted. Based on the experimental investigation, a shell-side periodic unit channel model of the longitudinal flow type heat exchanger was developed for numerical simulation to analyze the flow and heat transfer information of swirl flow induced by twisted leaf.The section-by-section performance evaluation factors were used to analyze the mechanism of heat transfer enhancement. The results demonstrate that the twisted leaf can produce a helical flow, resulting in the disruption of the continuity and stability of the fluid. The disturbing flow can promote turbulent intensity and enhance heat transfer effectively. The twistedleaf section gives worst integrated performance with a big increase in both heat transfer and pressure loss, and the trail-flow section also has no good performance because of the decayed swirl flow. The free-swirl-flow section provides the best performance with high efficiency and low pressure loss. In order to improve the integrated performance along the whole heat exchanger, it is recommended to optimize the shell side structure parameters to fully use the free swirl flow.关键词
旋流片/自旋流/换热器/数值模拟/传热综合因子Key words
twisted leaf/free swirl flow/heat exchanger/numerical simulation/thermal performance evaluation factor分类
能源科技引用本文复制引用
周水洪,邓先和,徐伟..管壳式换热器中旋流片强化管外传热的数值模拟[J].陕西科技大学学报（自然科学版）,2007,25(2):42-46,5.基金项目
国家重点基础研究发展规划项目(973项目No.G2000026301) （973项目No.G2000026301）
