CAJ | 학술논문

采用粒子图像测速技术（PIV）对安装“洁能芯”转子的换热管及光管进行了实验研究，获得了换热管内速度场及湍动能的分布。实验结果表明：与光管相比，换热管内安装“洁能芯”转子后，流场发生了改变，轴向速度分布由近抛物线形变为近 M 形分布；径向速度在管中心轴线两侧一个相当大的区域内比光管高出一个数量级，并且出现正负交替变化，即速度方向在不断地改变；作为最能体现“洁能芯”转子强化换热效果的指标，湍动能有了显著的提高，说明了“洁能芯”转子具有很好的强化传热功能。
채용입자도상측속기술（PIV）대안장“길능심”전자적환열관급광관진행료실험연구，획득료환열관내속도장급단동능적분포。실험결과표명：여광관상비，환열관내안장“길능심”전자후，류장발생료개변，축향속도분포유근포물선형변위근 M 형분포；경향속도재관중심축선량측일개상당대적구역내비광관고출일개수량급，병차출현정부교체변화，즉속도방향재불단지개변；작위최능체현“길능심”전자강화환열효과적지표，단동능유료현저적제고，설명료“길능심”전자구유흔호적강화전열공능。
Particle image velocimetry was used to study the tubes fitted with and without “Jienengxin” rotors and the plain tube, and the velocity fields and turbulent kinetic energy distribution were obtained. The experimental results reveal that, compared with the plain tube, the flow field of tube is changed with the rotors inserted in. The axial velocity distribution turns to M type from parabolic type; the radial velocity is an order of magnitude higher than that of plain tube in a large part of the axial region, with positive and negative values alternatively, namely the direction of velocity changes constantly. The turbulent kinetic energy is promoted remarkably, which means that better heat transfer effect could be achieved by “Jienengxin” rotors.