کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
771688 1462859 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation of heat transfer characteristic of fixed planar elastic tube bundles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Numerical investigation of heat transfer characteristic of fixed planar elastic tube bundles
چکیده انگلیسی


• Both tube-side and shell-side of planar elastic tube bundles were investigated.
• Heat transfer and fluid flow were studied from the local analysis perspective.
• Secondary flow varies depending on the fluid flow state and the geometry of tube.
• Curvature plays a role on the external flow field.
• The heat transfer of the two intermediate tube bundles is augmented.

Planar elastic tube bundles are a novel approach to enhance heat transfer by using flow-induced vibration. This paper studied the heat transfer characteristic and fluid flow in both tube-side and shell-side using numerical simulation. Two temperature difference formulas were used to calculate convective heat transfer coefficient and the results were verified by theoretical analysis and experimental correlations. The effect of Reynolds number on overall convective heat transfer coefficient and pressure drop in tube-side and shell-side were studied. The comparison of the secondary flow in planar elastic tube bundles and conical spiral tube bundles were conducted. The external flow field and local convective heat transfer around the periphery of fixed planar elastic tube bundles subjected to the cross fluid flow were also analyzed. The results show that the energy consumption efficiency should be taken into account in the forced heat transfer process conducted by adjusting the fluid flow. The secondary flow varies depending on the fluid flow state and the geometry of tube. Hence, it is deduced that the heat transfer enhancement is obtained because the thermal boundary layer in the deformed planar elastic tube bundles caused by flow-induced vibration is damaged by the disordered secondary flow. In addition, the convective heat transfer capability of outside the two intermediate tube bundles is enhanced because of the effect of irregular and complex fluid flow affected by the role of curved tubes on both sides.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 103, October 2015, Pages 859–870
نویسندگان
, , ,