期刊名称：Bulletin of the Institute of Heat Engineering
印刷版ISSN：2083-4187
出版年度：1995
卷号：79
语种：English
出版社：Warsaw University of Technology
摘要：The paper presents results of the heat flux fluctuations measurements performed on the surface of the horizontal cylinder 29 mm in diameter, mounted in vertical column, 0.19 m I.D. The air flow through a stagnant water was tested with its flow rates under the bubble, transition and churn flow regimes. In order to analyze the influence of liquid eddies of various scales approaching the cylinder surface the hot-film anemometer with 0.2 x 0.75 mm heated film was used in a constant temperature system. Statistical analysis of recorded signals was performed and some properties of the fluctuations are presented versus air superficial velocity, void fraction and sensor position. According to the obtained data the main intensification of the transport processes results from the random and local but anisotropic perturbations.
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