As a result, heat dissipating capacity, metal thermal intensity and freeconvectionheattransfer coefficient of the longitudinal closed finned tube are higher than those of the open finned tube.
结果表明，封闭式纵向翅片管的散热量、金属热强度以及自然对流换热系数都要高于开放式翅片管。
2
Holographic interferometry has been used to study the heattransfer by freeconvection from horizontal elliptic cylinder.
本文用激光全息干涉法研究了水平椭圆管的自然对流放热。
3
The experimental results indicate that freeconvection caused by the buoyancy in the heated tube with natural circulation has great influence on the heattransfer characteristics.