换热器测试中测温点布置最佳位置的研究

Study on Optimum Position of Temperature Measuring in Heat Exchangers Testing

在顺列管束空-空中冷器的换热规律研究中发现,测温点的布置对试验结果有较大影响,最佳测温点并非固定不变。通过对其进行大量测试分析和数值计算,提出了测温点布置的最佳位置与管外热空气雷诺数之间的关系式,为提高测试的准确性提供了依据。

The arrangement of point for measuring temperature will have an obvious influence on the test result,which has been confirmed by the study of the heat transfer characteristics of charge air cooler （CAC） for in-line arrangement of tube bundles, the best measure point is not changeless. An experimental study and numerical calculation were performed and the optimum position for measuring temperature was presented, the relationship between the distance from tube bundles to the temperature measure point and the Renault number Reo was given,which could be applicable to improve the test accuracy.