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首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer characteristics of a centrifugal heat sink
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Heat transfer characteristics of a centrifugal heat sink

机译：离心式散热器的传热特性

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A novel heat sink, called a centrifugal heat sink, into which the blades of a fan are integrated between the fins, is proposed. The fan blades, based on design principles of centrifugal turbomachinery, are arranged to be placed between the fins of the circular heat sink. The rotary motion of the blades causes nearby coolant to be sucked into and pass through channels formed by adjacent fins. Due to the integration of the blades into the space between the fins, additional space for the blades of the fan is no longer required for the centrifugal heat sinks. Consequently, this centrifugal heat sink makes efficient use of available cooling space. In this paper, an experimental investigation is conducted to demonstrate the concept of the centrifugal heat sink. As the speed of the fan increases, the average velocity is shown to increase proportionally. To evaluate the thermal performance of the centrifugal heat sink under constant heat flux conditions, the maximum temperature at the heat sink base is measured. As a result, the minimum thermal resistance of the centrifugal heat sink is found to be 0.47 K/W. In order to estimate the required pumping power and the thermal resistance, a theoretical model is also developed and validated using experimental results. From the theoretical model, optimized centrifugal heat sinks have lower thermal resistances than optimized plate-fin heat sinks under the fixed pumping power condition.
机译：提出了一种新颖的散热器，称为离心散热器，风扇的叶片集成在散热片之间。基于离心式涡轮机械的设计原理，风扇叶片被布置为放置在圆形散热器的翅片之间。叶片的旋转运动导致附近的冷却剂被吸入并通过相邻散热片形成的通道。由于叶片集成到散热片之间的空间中，因此离心散热器不再需要用于风扇叶片的额外空间。因此，该离心式散热器有效利用了可用的冷却空间。在本文中，进行了实验研究以证明离心散热器的概念。随着风扇速度的增加，平均速度显示出成比例的增加。为了评估在恒定热通量条件下离心式散热器的热性能，需要测量散热器底座的最高温度。结果，发现离心式散热器的最小热阻为0.47 K / W。为了估计所需的泵浦功率和热阻，还开发了一个理论模型并使用实验结果进行了验证。从理论模型来看，在固定泵浦功率条件下，优化的离心式散热器的热阻低于优化的板翅式散热器。

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