The flow regimes of liquids encountered in engineering practice are mainly turbulent due to their structure, with which the features of such flows at supercritical pressure are considered in the work and some results are compared with similar ones obtained at low Reynolds numbers. Under these conditions, the physical properties of the fluid change sharply in the parietal layer and, depending on the values of the heat flux density and temperature, the area of sharp changes in physical properties can move along the flow cross section. Depending on the influence of these factors, the nature of the fluid flow can change, which affects the patterns of heat transfer and, accordingly, the nature of the distribution of wall temperature. In particular, conditions were identified for the appearance of a primary and secondary improved heat transfer regime. The possibility of the existence of an anomalous behavior of heat transfer during a turbulent flow of aromatic hydrocarbons was revealed, the nature of the distribution of the wall temperature along the length of the experimental tube is examined, and the influence of changes in the thermophysical properties of the substance on it is analyzed. The experimental data for water and toluene with a deteriorated heat transfer mode deviate from the calculated by [Formula: see text]25%.As is known, the flow regime of fluids in engineering practice is mainly turbulent in structure. Therefore, it is very important to study the characteristics of such flows at supercritical pressure and compare some results with similar results obtained at low Reynolds numbers.

中文翻译：

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湍流状态和超临界压力下管壁温度状态的研究

工程实践中遇到的液体流态主要是湍流，由于其结构，在工作中考虑了这种流动在超临界压力下的特点，并将一些结果与在低雷诺数下获得的类似结果进行了比较。在这些条件下，流体的物理性质在壁层发生急剧变化，并且根据热通量密度和温度的值，物理性质急剧变化的区域可以沿流动横截面移动。根据这些因素的影响，流体流动的性质可能会发生变化，这会影响传热模式，从而影响壁温分布的性质。特别是，确定了出现初级和次级改进传热方案的条件。揭示了芳烃湍流过程中存在传热异常行为的可能性，研究了壁温沿实验管长度分布的性质，以及热物理性质变化的影响对其上的物质进行分析。传热模式劣化的水和甲苯的实验数据偏离[公式：见正文]计算的25%。众所周知，工程实践中流体的流态主要是结构上的湍流。因此，研究这种流动在超临界压力下的特性并将一些结果与在低雷诺数下获得的类似结果进行比较是非常重要的。