Numerical Simulation Research On Heat Transfer, Pressure Drop And Anti-fouling Performence Of The Spiral Corrugated Tube

Heat exchanger devices has been widely used in petroleum, chemical, energy and other process industries. The rapid development of domestic and international economic leads to energy consumption soaring, and the energy crisis caused by the shortage of energy has gradually affected the areas of economy, ecology and environment. With the development of industrial technology, enhanced heat transfer technology has made great progress and has been widely applied to the heat transfer devices, especially the application of enhanced heat transfer tubes. The spiral corrugated tubes (SCT) studied by the this paper is a new kind of heat transfer tube with complicated structure, and it is made of a circular copper tube by plastic deformation forming concave and convex folds on the tube wall, which has good double-side heat transfer enhancement performance compared with other heat transfer components, but this novel SCT has not been researched and the investigation of SCT is not perfect. In this paper, heat transfer, pressure drop and anti-fouling characteristics of SCT is studied by numerical simulation combining theoretical analysis. The main contents and results are as follows:1?Numerical simulation method is applied to analyze the heat transfer and flow characteristics inside the SCT compared with circular tube, which reveal that the heat transfer performance of SCT is better than circular tube, and the Nusselt number inside SCT is 1.32-1.363 times circular tubes, and friction coefficient inside SCT is 1.97?2.51 times circular tube. The enhanced heat transfer mechanism of SCT is that the longitudinal votex and secondary flow inside SCT caused by spiral shape improve the field synergy performance of the temperature field and velocity field to enhance its heat transfer performence.2^ Method of control variable was employed to investigate the influence of geometric parameters (corrugation depth e and pitch p), the Reynolds Numbe and Prandtl on heat transfer and pressure drop performance of SCT. Correlations for calculation of Nusselt number and friction coefficient were obtained through using regression analysis for data processing.3?Numerical simulation of solid and fluid two-phase flow method were applied to research the anti-fouling property inside SCT compared with circular tubes, which found that the anti-fouling performance inside SCT is better than circular tubes. On the other hand, the effect of geometric parameters (corrugation depth e and pitch p), the Reynolds Numbe and Prandtl on anti-fouling characteristic inside SCT also were studied.In this paper, the research results for the novel SCT study provides a theoretical foundation for engineering design and industrial applications.