【摘要】 本文对液态金属钠在环管热进口段部分的湍流传热做了实验研究.实验的主要特性参数如下:环形通道之直径比 d₂/d₁=1.54;热流密度 q=50W/cm²;雷诺数Re=2×10⁴～1.5×10⁵;伯克利数 Pe=122～1078.分析表明,实验值与理论值吻合良好.最后,分别给出稳定段和热进口段的努谢尔特数以及热进口段长度的计算式.更多还原

【Abstract】 An experimental investigation was made for turbulent heat transfer to li-quid sodium in the thermal entrance regions.The main experimental characteri-stic parameters are the diameter ratio of the annular d₂/d₁=1.54,heat flux q=50W/cm²,Reynolds numbers Re=2×10⁴～1.5×10⁵,Paclet numbers Pe=122～1078.Analyses showed that the experimental results were in good agreementwith the theoretical prediotion.Finally,some empirical relations were obtainedrespectively for the Nusselt numbers in the fully-developed region and in thethermal entrance region and for the thermal entrance length of turbulent flowof liquid sodium.更多还原