CAJ | 학술논문

基于有限容积法建立波纹翅片管换热器流体流动与传热的计算模型，在不同送风速度工况下，分别对6种不同波纹倾角结构换热器内流体的流动及传热进行了数值模拟，分析了流道内的温度场、压力场及速度场的变化规律，得到了换热量、压降以及出口温度随入口风速变化的规律。结果表明，换热量、压降以及出口温度均随波纹倾角的增加而增大；换热量随着送风速度的加快而增加，压降及出口温度随着送风速度的加快而降低；翅片板间流体的流动与传热存在比较明显的不均性，导致换热管背风侧存在明显的传热“死区”。
기우유한용적법건립파문시편관환열기류체류동여전열적계산모형，재불동송풍속도공황하，분별대6충불동파문경각결구환열기내류체적류동급전열진행료수치모의，분석료류도내적온도장、압력장급속도장적변화규률，득도료환열량、압강이급출구온도수입구풍속변화적규률。결과표명，환열량、압강이급출구온도균수파문경각적증가이증대；환열량수착송풍속도적가쾌이증가，압강급출구온도수착송풍속도적가쾌이강저；시편판간류체적류동여전열존재비교명현적불균성，도치환열관배풍측존재명현적전열“사구”。
Based on finite volume method ,a three-dimensional calculation model of a wavy fin exchanger was built up for fluid-flow and heat-transfer study ,and using CFD software ,numerical simulation were carried out for fluid flow and heat transfer inside the heat exchanger of 6 different inclination angles under conditions of different air velocities .The variations of the temperature field ,pressure field and velocity field in the channels were analyzed ,and the variations of heat transfer , pressure drop and outlet temperature with the inlet velocity were obtained .The results show that the heat transfer ,pressure drop and outlet temperature increases with the increase of the corrugation inclination ;the heat transfer increases while the pressure drop and outlet temperature decreases with the rising flow velocity ;obvious non-uniformity of flow and heat transfer exists between the fins ,resulting in obvious heat transfer "dead zone"at the leeward side of the heat transfer tube .