CAJ | 학술논문

通过实验和数值模拟的方法，研究了不同功率下家用LED灯翅片散热器内的温度分布、表面传热系数等换热性能。结果表明：随散热器温度上升，翅片间空气速度增加，速度增大到一定值时，空气流态从层流向湍流过渡，使得基板的温度先升高，在湍流出现时散热性能增强，基板的温度随之下降，随后趋于定值；随功率的增加，平均表面传热系数略有增加，但影响不大。
통과실험화수치모의적방법，연구료불동공솔하가용LED등시편산열기내적온도분포、표면전열계수등환열성능。결과표명：수산열기온도상승，시편간공기속도증가，속도증대도일정치시，공기류태종층류향단류과도，사득기판적온도선승고，재단류출현시산열성능증강，기판적온도수지하강，수후추우정치；수공솔적증가，평균표면전열계수략유증가，단영향불대。
An experimental and numerical study on heat dispersion properties of a domestic LED of different pow -er was conducted .The research shows that , with the growth of temperature , the speed of the air increases .When it increases to a certain value , the transition of the air flow pattern from laminar to turbulent occurs and the tem-perature of the substrate increases .When turbulent occurs , the temperature decreases and then keeps a fixed value.With the growth of the power , the average surface heat transfer coefficient increases only slightly .