The boiling bundle effect was investigated on a column of reentrant cavity tubes to reveal the heat transfer coefficient (HTC) variation for a tube which is affected by other tubes. All experimental data were obtained on the specific tube, which is the distinct difference between the adopted homologous method and the routine method. Two columns of eight horizontal tubes were submerged in R134a liquid, and each tube was specifically heated by an ethylene glycol–water mixture. The saturation temperature was 6.0 °C, the heat flux ranged from 10.0 kW/m² to 28.0 kW/m², and the row number ranged from 1 to 7. The tube length in the test section was 500 mm, and the pitch–diameter ratio was 1.32. Results showed that the uncertainty of the bundle effect using the homologous method was less than ± 4.4%, which decreased by at least 80% compared with that using the routine method. The values were from 1 to 1.32, indicating that the upward bubbles from the lower heated tubes positively influenced the boiling HTC. Moreover, the bundle effect increased with the increase in row number and decreased with the increase in heat flux. Correlations of the single-tube HTC and the bundle effect with vapor film Reynolds number and effective row number were established to predict the experimental data. The current study can offer a reference for further investigations of film or convective boiling on tube bundles.

在一列凹腔管上研究沸腾束效应，以揭示受其他管影响的管的传热系数 (HTC) 变化。所有实验数据均在特定试管上获得，这是采用同源方法与常规方法的明显区别。两列八根水平管浸没在 R134a 液体中，每根管都用乙二醇-水混合物专门加热。饱和温度为 6.0 °C，热通量范围为 10.0 kW/m ²至 28.0 kW/m ²，行数为1～7。试验段管长为500 mm，节径比为1.32。结果表明，同源法的束效应不确定度小于±4.4%，比常规法降低了至少80%。该值从 1 到 1.32，表明来自较低加热管的向上气泡对沸腾 HTC 产生积极影响。此外，束效应随着行数的增加而增加，随着热通量的增加而减少。建立单管HTC和束效应与蒸气膜雷诺数和有效行数的相关性以预测实验数据。该研究可为进一步研究管束上的薄膜沸腾或对流沸腾提供参考。