多种纵向涡发生器配置方案流动换热的数值模拟
Numerical Simulation of Flow and Heat Transfer in Various Configurations of Longitudinal Vortex Generators
符昊 1杨元龙 2栾一刚1
作者信息
- 1. 哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨 150001
- 2. 中国舰船研究设计中心,湖北武汉 430061
- 折叠
摘要
为了深入挖掘三角翼纵向涡发生器在两个相对壁面布置的强化换热潜力,采用数值模拟方法,在雷诺数3 000～18 000的范围内研究了5种纵向涡发生器配置的流动换热情况,配置方式包括单面布置的共同上、下流配置,双面布置的共同上、下流配置,以及混合配置.结果表明:纵向涡可以很好地提高场协同效果,换热强度不完全取决于通道中的二次流强度,还取决于通道中的场协同性;在所有配置中,混合配置具有最高的二次流强度、最佳的场协同效果以及换热性能,可以将光滑通道的Nu提高28.3％～35.3％;另外4种配置可分别将光滑通道的Nu提高 21.4％～32.0％,20.0％～29.2％,26.3％～34.3％和 23.7％～28.0％;建议选用 Re＜6 000 范围内的混合配置,此时其具有1.03～1.10的综合换热因子以及1.32～1.35的Nu/Nu0.
Abstract
In order to further explore the potential of heat transfer enhancement of delta winglet longitudi-nal vortex generators arranged on two opposite walls,the flow and heat transfer of five longitudinal vortex generator configurations including common-flow-up configuration on one wall,common-flow-down configu-ration on one wall,common-flow-up configuration on two walls,common-flow-down configuration on two walls and mixed configuration were studied by numerical simulation in the range of Reynolds number from 3 000 to 18 000.The results show that the longitudinal vortex can improve the field synergy effect.The heat transfer intensity not only depends on the secondary flow intensity in the channel,but also depends on the field synergy;among all configurations,the mixed configuration has the highest secondary flow in-tensity,the best field synergy effect and the best heat transfer performance,which can increase the Nu of the smooth channel by 28.3-35.3％.The other four configurations can increase the Nu of the smooth channel by 21.4-32％,20.0-29.2％,26.3-34.3％and 23.7-28.0％,respectively;mixed con-figuration with Re＜6 000 is recommended,which has a TPF of 1.03-1.10 and a Nu/Nu0 of 1.32-1.35.
关键词
纵向涡发生器/配置方案/二次流/场协同/流动换热/数值模拟Key words
longitudinal vortex generator/configuration scheme/secondary flow/field synergy/flow and heat transfer/numerical simulation引用本文复制引用
基金项目
国家科技重大专项(2017-Ⅰ-0007-008)
出版年
2024
NETL
NSTL
万方数据