Numerical Simulation on Thermal Characteristics of a New Super Open-frame Vaporizer Enhanced Tube
A new Super Open-frame Vaporizer enhanced tube (SOVET), which based on traditional Super Open-frame Vaporizer tube (SOVT), was proposed to obtain better thermal characteristics , including flow, heat transfer and resistance. Results showed that the velocity vector of the spiral flow channel distributed uniform and stable due to the turbulence and secondary flow generated by spiral structure. The turbulence led to a large temperature gradient in the boundary layer near the tube wall, meanwhile, secondary flow destroyed the boundary layer and enhanced radial disturbance and forced more fluid to participate in heat exchange. Nusselt number of SOVET was 1.1～2 times larger than that of SOVT when adopting the new structure fluid channel at the range of 0.1 to 2m/s of inlet velocity. The resistance of SOVET was 0.9 times lower than that of SOVT, because SOVET increased the distance between the flow channel and the base tube appropriately, a fundamental change of fluid movement took place in the near wall of tube, which reduced friction coefficient greatly and the whole tube pressure drop loss. The heat transfer and flow comprehensive performance of SOVET was also obviously improved.
numerical simulation vaporizer enhanced tube heat transfer performance
Jing Li Meiling Yu Zhaojun Fang
Chemistry and Chemical Engineering College, South china University of Technology,Guangzhou,510640,Ch Key Lab of Heat Transfer and Energy Conservation, South china University of Technology，Guangzhou, 51 Suzhou Branch of Xi’an Thermal Power Research Institute Co., Ltd. Suzhou, 215011, China
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-5
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）