| 1. | Experimental investigation on condensation heat transfer in horizontal microfin and smooth tube with refrigerant r
22在水平微肋管和光管内凝结换热的实验研究 |
| 2. | Experimental investigation on condensation heat transfer and pressure drop of high saturation temperature organic fluid in a horizontal smooth tube
水平管内高沸点有机工质凝结换热的实验研究 |
| 3. | The results indicate that the film thickness on the surface of the horizontal twisted and fluted tube becomes more uniform than the classical smooth tube
结果表明，与水平光滑圆管相比，水平螺旋槽管表面的液膜变薄且分布变均匀。 |
| 4. | The results showed that the total heat transfer coefficient of petal - shaped finned tube oil - cooler with helical baffles was 4 ~ 5 times as large as that of smooth tube oil - cooler with segmental baffles at the same oil pressure drop
结果表明，在相同油压降下，螺旋隔板花瓣管油冷却器的总传热系数是弓形隔板光滑管油冷却器的4 ~ 5倍。 |
| 5. | Finned tube is welded the finned helix pieces on the smooth tube , expanding 4 ~ 10 times of the heat transfer surface , highly elevated the heat - transfer coefficient of the tube to reach the purpose of rapid , efficient heat transferring
翅片管是在钢管外表面焊上螺旋型翅片，扩展外表面传热面积4 10倍，大幅提升管子的传热系数，达到高效快速传热的目的。 |
| 6. | Compares the 3 - d ift with smooth tube , the result shows that heat transfer augments , volume decreases , metallic material reduces and energy saves . so the tube with three dimensional internally extended surface have very wide engineering application background
使用结果表明：使用了三维内肋管的换热器同未使用前相比，换热强度提高，体积减少，金属材料耗量减小，能耗降低，具有十分广阔的应用前景。 |
| 7. | The heat transfer and flow resistance performance of petal - shaped finned tube oil - cooler with helical baffles was studied , and compared the total heat transfer coefficient of petal - shaped fimed tube oil - cooler with helical baffles with that of smooth tube oil - cooler with segmental baffles
摘要研究了螺旋隔板花瓣管水冷壳管式油冷却器的传热和流阻性能，并与弓形隔板光滑管水冷壳管式油冷却器进行了性能对比。 |
| 8. | It tell us : the abrasive capability of fly ash ; the similar calculation of ash erosion ; the calculation of ash erosion in the tube in turn and tube out of turn ; the reason of tube abrasion for gas flue ; the influence of air parameter for fly ash erosion ; the influence of changing temperature ; the influence of the flue gas composition , etc . next , it advances the solving measure ; reduce the flue gas velocity ; reduce the concentration of fly ash ; responsible construction : replace smooth tube with spiral tube ; use the new material of abrasion ; fuel desulfurization ; reduce so3 of flue gas ; raise flue gas temperature , making it up the dew point ; use the abrasion - resistance material to resist abrasion
讨论了飞灰磨损性能、管壁受飞灰冲蚀的近似计算、灰粒对顺列管和错列管的磨损计算、烟气走廊引起对流管束的磨损机理、空气动力参数对飞灰冲蚀的影响以及受热面壁温变化及烟气成份对飞灰磨损的影响等问题。接着提出了解决的措施：降低平均烟气流速；降低飞灰浓度；使用鳍片管、螺旋翅片管代替光管；选择合适的结构及排列方式，减少烟气中so3的含量；提高受热面壁温使之大于烟气的露点温度；采用抗腐蚀材料作受热面等防腐蚀的措施。 |
| 9. | Enhanced heat transfer tube with spiral - surface has simple frame , cheap cost , and wide - ranging purpose . only few dirt can adhere to it and is easy to be washed . it has distinct strengthen effect , and can improve chief heat transfer coefficient at 35 - 40 % comparing with smooth tube exchanger which has same volume and pump power consumption
螺旋型表面强化管结构简单，成本低廉，用途广泛，结垢少且易清洗，其强化效果明显，与体积、消耗泵功率相同的光管式换热器相比，螺旋槽管换热器可以将总传热系数提高35 40 ，因而备受人们青睐。 |
| 10. | Based on the j c chen double mechanisms superposition model , the experimental formula of the heat transfer coefficient on the evaporation side in the smooth tube was obtained . considering the influence of spring to the falling film , the formula of heat transfer coefficient on the evaporation side in the vertical tube with spring inserts was obtained . the predicated heat transfer coefficient through this two formulas was finely accord with the experimental result , and the error was basically under 10 %
在jcchen双机理加和模型的基础上，得出了光管降膜蒸发侧传热系数的实验关联式，并考虑了螺旋线对降落液膜的影响，得出了管内插入螺旋线的降膜蒸发侧传热系数关联式，这两个关联式预测的传热系数与实验值吻合良好，误差基本在10以内。 |
