RUI:Theoretical and Experimental Investigation of Viscous Flow and Convective Heat Transfer in Helicoidal Heat Exchangers (REU Supplement)

RUI：螺旋换热器中粘性流和对流传热的理论与实验研究（REU 补充）

• 批准号: 9017732
• 负责人: M. Ebadian
• 金额: --
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-01 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017732&HistoricalAwards=false
• 关键词: RUI; Theoretical; Experimental; Investigation; Viscous

This investigation is both experimental and theoretical. The objectives of the proposed research are as follows: (1) to develop a complete general solution for viscous laminar and turbulent flows in helicoidal pipes; (11) to obtain the complete general solution of convective heat transfer for laminar and turbulent flows in helicoidal pipes and; (iii) to repeat (i) and (ii) experimentally. The specific objectives ar to obtain the flow fields and thermal properties in the listed cases for which rigorous analytical/numerical or experimental results are not available, and to present correlations, tables, and graphs for use in industrial application. It is believed that the availability of accurate analytical, numerical and experimental results for these fundamental problems are important from academic and practical points of view and they will further enhance the research in this area. The governing equations are non-linear. These equation, by using the method of perturbation for laminar flow will be reduced to a set of ordinary differential equations. By the use of numerical methods, an algorithm will be developed for the evaluation of these equations. The modified K-. Turbulent Model will be used to solve the governing equations. For part (iii), an experimental set-up will be designed and used to obtain experimentally the fluid flow using laser doppler anemometry (LDA) and temperature field using data acquisition. Experimental findings will be compared with the results of theoretical/numerical analysis to check the validity of basic assumptions and of various models available in literature.

这项研究既是实验性的，也是理论性的。 本研究的目标如下：（1）开发螺旋管中粘性层流和湍流的完整通用解决方案； (11) 获得螺旋管内层流和湍流对流换热的完整通解； (iii) 实验性地重复(i) 和(ii)。 具体目标是在无法获得严格的分析/数值或实验结果的情况下获得所列情况下的流场和热特性，并提供用于工业应用的相关性、表格和图表。 人们相信，从学术和实践的角度来看，对这些基本问题提供准确的分析、数值和实验结果非常重要，并将进一步加强该领域的研究。 控制方程是非线性的。 这些方程，通过使用层流扰动的方法，将被简化为一组常微分方程。 通过使用数值方法，将开发一种算法来评估这些方程。 修改后的K-.湍流模型将用于求解控制方程。 对于第 (iii) 部分，将设计并使用实验装置，以通过激光多普勒风速计 (LDA) 实验获得流体流量，并通过数据采集获得温度场。 实验结果将与理论/数值分析的结果进行比较，以检查基本假设和文献中可用的各种模型的有效性。