关键词: 开孔转子, 努塞尔数, 阻力系数, 综合评价因子, 转子, 孔径比, 努塞尔数, 阻力系数, 综合评价因子

Abstract: Experiments were conducted to study the heat transfer and friction factor of the heat transfer tube inserted with rotors with different holes. A 60% glycerin solution was used as tube-side working fluid in the transition region. In order to ensure reliability of experimental results，plain tube validation experiments were also conducted. Meanwhile，the effects of hole on heat transfer enhancement of the rotors were investigated. The Nusselt number of the tube inserted with S=0.375 rotors increased by 9.5% and by 21% than the Nusselt number of the tube inserted with normal rotors and rotors with hole of 3mm diameter respectively. Its friction factor increased by about 9% than the friction factor of the tube inserted with S=0 rotors and S=0.25 rotors. The PEC value of the tube inserted with S=0.375 rotors was the best，while the PEC value of the tube inserted with S=0 rotors was better than the tube inserted with S=0.25 rotors. The diameter of the hole had different impacts on the performance of the rotors. Big hole had a good effect，but on the contrary small hole weakened heat transfer enhancement.

Key words: rotor with hole , Nusselt number, friction factor, comprehensive performance（PEC）, rotors, aperture ratio：Nusselt number, friction factor, comprehensive performance（PEC）