多波内螺旋翅片管的数值模拟和实验研究
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摘要
利用实验和数值模拟方法,研究了多波内螺旋翅片管的流动与传热特性。探讨了4种进口速度(15,20,25和30 m/s)和4种内螺旋角(15°,20°,25°,30°)分别对多波内螺旋翅片管流动与传热性能的影响。并且比较了当进口速度恒定时,各管的综合性能。实验数据与模拟结果相符较好,误差范围在5.1%—7.4%之间。研究结果表明:多波内螺旋翅片管比平直矩形内翅片管传热系数提高13.7%—117.8%,并且其综合性能在内螺旋角25°附近存在最佳值。
The flow and heat transfer characteristics of multi-wave internal spiral finned tubes were studied by experiment and numerical simulation. The effects of four kinds of inlet velocities(15, 20, 25, 30 m/s) and four internal spiral angles(15°, 20°, 25°, 30°) on the flow and heat transfer performances of multi-wave internal spiral finned tubes were discussed, respectively. And the comprehensive performances were compared between the test tubes when the inlet velocity was constant. The experimental data were in good agreement with the numerical results. The error range was between 5.1% and 7.4%. Research results showed that the heat transfer coefficient of multi-wave internal spiral finned tube was higher 13.7%-42.1% than that of the tube with internal longitudinal plat-rectangle fins. In addition, there was an optimum value around 25° of the internal spiral angle for the overall performance.
The flow and heat transfer characteristics of multi-wave internal spiral finned tubes were studied by experiment and numerical simulation. The effects of four kinds of inlet velocities(15, 20, 25, 30 m/s) and four internal spiral angles(15°, 20°, 25°, 30°) on the flow and heat transfer performances of multi-wave internal spiral finned tubes were discussed, respectively. And the comprehensive performances were compared between the test tubes when the inlet velocity was constant. The experimental data were in good agreement with the numerical results. The error range was between 5.1% and 7.4%. Research results showed that the heat transfer coefficient of multi-wave internal spiral finned tube was higher 13.7%-42.1% than that of the tube with internal longitudinal plat-rectangle fins. In addition, there was an optimum value around 25° of the internal spiral angle for the overall performance.
引文
[1] WANG Qiuwang, LIN Mei, ZENG Min. Effect of blocked core-tube diameter on heat transfer performance of internally longitudinal finned tubes [J]. Heat Transfer Engineering, 2008, 29 (1): 107-115.
[2] WANG Qiuwang, LIN Mei, ZENG Min. Effect of lateral fin profiles on turbulent flow and heat transfer perfor-mance of internally finned tubes [J]. Applied Thermal Engineering, 2009, 29: 3006-3013.
[3] 李静,刘建勇,罗东晓. 新型纵向流一体式翅片管换热性能数值模拟[J]. 化学工程,2010,38(7):18-21.
[4] 刘晓红,熊剑,张正国. 螺旋隔板三维翅片管传热实验研究与数值模拟[J]. 化学工程,2009,37(11):8-11.
[5] SZAJDING A, TELEJKO T, STRAKA R, et al. Experimental and numerical determination of heat transfer coefficient between oil and outer surface of monometallic tubes finned on both sides with twisted internal longitudinal fins [J]. International Journal of Heat and Mass Transfer, 2013, 58: 395-401.
[6] LIU Lin, LING Xiang, PENG Hao. Analysis on flow and heat transfer characteristics of EGR helical baffled cooler with spiral corrugated tubes [J]. Experimental Thermal and Fluid Science, 2013, 44: 275-284.
[7] LIU Lin, LING Xiang, PENG Hao. Complex turbulent flow and heat transfer characteristics of tubes with internal longitudinal plate-rectangle fins in EGR cooler [J]. Applied Thermal Engineering, 2013, 54: 145-152.
[8] LIU Lin, FAN Yuezhong, LING Xiang, et al. Flow and heat transfer characteristics of finned tube with internal and external fins in air cooler for waste heat recovery of gas-fired boiler system [J]. Chemical Engineering and Processing, 2013, 74 : 142-152.
[9] LIU Lin, LING Xiang, PENG Hao. Study on turbulent flow and heat transfer performance of tubes with internal fins in EGR cooler [J]. Heat Mass Transfer, 2015, 51: 1017-1027.
[10] PENG Hao, LIU Lin, LING Xiang, et al. Thermo-hydraulic performances of internally finned tube with a new type wave fin arrays [J]. Applied Thermal Engineering, 2016, 93:991-999.
[2] WANG Qiuwang, LIN Mei, ZENG Min. Effect of lateral fin profiles on turbulent flow and heat transfer perfor-mance of internally finned tubes [J]. Applied Thermal Engineering, 2009, 29: 3006-3013.
[3] 李静,刘建勇,罗东晓. 新型纵向流一体式翅片管换热性能数值模拟[J]. 化学工程,2010,38(7):18-21.
[4] 刘晓红,熊剑,张正国. 螺旋隔板三维翅片管传热实验研究与数值模拟[J]. 化学工程,2009,37(11):8-11.
[5] SZAJDING A, TELEJKO T, STRAKA R, et al. Experimental and numerical determination of heat transfer coefficient between oil and outer surface of monometallic tubes finned on both sides with twisted internal longitudinal fins [J]. International Journal of Heat and Mass Transfer, 2013, 58: 395-401.
[6] LIU Lin, LING Xiang, PENG Hao. Analysis on flow and heat transfer characteristics of EGR helical baffled cooler with spiral corrugated tubes [J]. Experimental Thermal and Fluid Science, 2013, 44: 275-284.
[7] LIU Lin, LING Xiang, PENG Hao. Complex turbulent flow and heat transfer characteristics of tubes with internal longitudinal plate-rectangle fins in EGR cooler [J]. Applied Thermal Engineering, 2013, 54: 145-152.
[8] LIU Lin, FAN Yuezhong, LING Xiang, et al. Flow and heat transfer characteristics of finned tube with internal and external fins in air cooler for waste heat recovery of gas-fired boiler system [J]. Chemical Engineering and Processing, 2013, 74 : 142-152.
[9] LIU Lin, LING Xiang, PENG Hao. Study on turbulent flow and heat transfer performance of tubes with internal fins in EGR cooler [J]. Heat Mass Transfer, 2015, 51: 1017-1027.
[10] PENG Hao, LIU Lin, LING Xiang, et al. Thermo-hydraulic performances of internally finned tube with a new type wave fin arrays [J]. Applied Thermal Engineering, 2016, 93:991-999.