Secondly , the relation between nusselt number and the local time - averaged velocity and temperature fields of turbulent convection was theoretically induced , which expands the field - coordinated enhancement principle to turbulent convective heat transfer 然后,在理論上導出了紊流對流換熱的整體換熱性能與局域時均速度場和時均溫度場的一般關(guān)系式,將對流換熱的場協(xié)同強化原則擴展至湍流換熱。