关键词: 对流换热, 场协同原理, 匹配性原则, 大值原则

Abstract: The research on heat transfer gives a rough conclusion that vibration can enhance heat transfer near the vibrating surface,and its mechanism basically depends on the boundary layer theory that vibration reduces the thickness of boundary layer.Field synergism theory in convective transfer interprets convective enhancement approach by the maxing principle and matching principle with quantitative indicators.In this study,the convective heat transfer characteristics of vibrating cylinder is investigated using maxing principle and matching principle of field synergism.The properties of working fluid are similar to those of water,the cylinder vibrates in simple harmonic vibration with frequency of 15 Hz,the amplitude is 1 mm,and the turbulence model is RNG k-ε model.The study shows that the relation between heat transfer and synergism performance interprets the enhancement of heat transfer outside the vibrating cylinder.The matching principle and maxing principle in synergism theory shows that the improvement is from the increase of heat transfer coefficient.Synergism angle cosine has maximum values on position phase 0° and 180° and minimum values on 90° and 270°,and increases when the time phase is close to the equilibrium moment.The synergism matching performance corresponds to the angle cosine value. Heat transfer coefficient distribution pattern is consistent with the angle cosine value and matching coefficient.

Key words: convection, field synergism theory, matching principle, maxing principle