介绍了螺旋强化管周围受限横流的实验研究结果。通过在透明通道中放置一排螺旋槽管来模拟受限横流，这有助于观察管周围的流动。该试验段用作横流式换热器，在该换热器中，通过管内蒸汽冷凝，对管束外以受限横流模式流动的冷水进行了试验。总传热系数、横流传热系数和管侧传热系数直接由测量的质量流量和流体温度计算得出。 在多个轴向位置测量槽顶槽处的管温度，可以直接评估单个传热系数，而无需繁琐、有时容易出错的威尔逊图。传热系数用于建立努塞尔数与几何变量和流动变量之间的关系。近似无量纲变量，如排管数、凹槽间距、凹槽深度、凹槽起始数、雷诺数和普朗特数，被用作相关性中的自变量。根据使用流动可视化技术观察到的流动机制，试图解释努塞尔数对每个变量的依赖性。 关键词:实验，热流，特性，扩展表面换热器，横流换热器，管，螺旋换热器，传热系数，计算，测量，流量，温度，努塞尔数，雷诺数，普朗特数。引文:研讨会，ASHRAE交易，第96卷，pt。1990年3月2日，圣路易斯

Presents the results of an experimental investigation of confined cross-flow around spirally enhanced tubes. Confined cross-flow was simulated by placing a bank of spirally fluted tubes in a transparent channel that facilitated viewing of the flow around the tubes. This test section was used as a cross-flow heat exchanger in which cold water flowing in a confined cross-flow mode outside the tube bank was tested by steam condensing on the inside of the tube. Overall heat transfer coefficients, cross-flow heat transfer coefficients, and tube-side heat transfer coefficients were calculated directly from measured mass flow rates and fluid temperatures. Measurement of the tube temperature at the flute crest trough at several axial locations allowed the evaluation of individual heat transfer coefficients directly without the need for tedious, and sometimes error-prone, Wilson plots. Heat transfer coefficients were used to develop a correlation for the Nusselt number in terms of geometric and flow variables. Approximately nondimensionalised variables, such as the number of tubes in the bank, flute pitch, flute depth, number of flute starts, Reynolds number, and Prandtl number, were used as independent variables in the correlation. An attempt was made to explain the dependence of the Nusselt number on each of these variables on the basis of the flow mechanisms observed by using flow visualisation techniques.KEYWORDS: experiment, heat flow, properties, extended surfaces heat exchangers, cross flow heat exchangers, tubes, spiral heat exchangers, heat transfer coefficient, calculating, measuring, flow rate, temperature, Nusselt number, Reynolds numbers, Prandtl number.