Augmentation of Heat Transfer in Pipe Flow Using Plain Twisted Tape Inserts for Different Twist Ratios

• 作者: Maimonul Karim Chowdhury Md. Moniruzzaman Bhuyan Ujjwal Kumar Deb
• 来源期刊: 能源与动力工程(英文)
• 学科: 医学
• 关键词: Heat Transfer TWIST Ratio REYNOLDS Number TURBULENT Flow Simulation
• 年，卷（期）: 2019,（9）
• 页码范围: 342-354
• 页数: 13页
• 分类号: R73

摘要

The heat transfer augmentation of plain twisted tape inserts for different twist ratios has been studied in this study. The data are conducted using the plain twisted tape insert with five different twist ratios respectively. The range of Reynolds number is considered under a uniform heat flux condition. In the case of simulation, the tapes are made from a stainless steel strip with a thickness of 2 mm. A tubular pipe with 850mm U-loop length and twist length of 800 mm each is considered in our study for simulation. Water is used as working fluids inside the tube for our simulation. The simulation results demonstrate that the important heat transfer parameters including Nusselt number (Nu), friction factor (f) and thermal performance index (η) are gradually increased with the increment of the twist ratio and reached at the saturated level while twist ratio is 3.5,?afterward the thermal properties are decreased.