Abstract

The results of an experimental study of the average heat transfer, hydraulic resistance and vortex structure at the cross flow of a single-row of round cylinders with spiral grooves on the external surface are presented. The equations of similarity on the average heat transfer and hydraulic resistance were obtained

Highlights

  • The results of an experimental study of the average heat transfer, hydraulic resistance and vortex structure at the cross flow of a single-row of round cylinders with spiral grooves on the external surface are presented

  • The intensity of heat transfer with the decrease in the groove step increased from 28% to 65%

  • The exponent m at the Reynolds number in the equation Eu = A ∙ Rem increased from 0.6 to 0.74 indicating the appearance of at least a part of the heat transfer surface of the turbulent flow regime

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Summary

Гладкий циліндр

2. Конденсація вологи на циліндрі-калориметрі; dry – область зменшеної концентрації сконденсованої вологи. Потоку, переважна концентрація сконденсованої вологи спостерігається в зоні зменшених швидкостей обтікання. В роботі [6] запропоновано і протестовано метод врахування випадіння вологи, що дозволяє скоректувати результати вимірювань

Середній теплообмін
Гідравлічні втрати
Вихрова структура
Results

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