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    • 6. 发明授权
    • Method for using pulsating flow to improve thermal transport in systems
    • 使用脉动流改善系统热传输的方法
    • US06219234B1
    • 2001-04-17
    • US09281703
    • 1999-03-30
    • Bahgat G. SammakiaSanjeev B. Sathe
    • Bahgat G. SammakiaSanjeev B. Sathe
    • H05K720
    • H05K7/20154F26B21/028F26B21/12
    • A method for forming a pulsating air pattern at a surface of an electronic carrier assembly. The electronic carrier assembly includes a circuit card having an attached module or chip. An air circulation pattern, or flow pattern, is formed at the surface of an electronic carrier assembly by natural convection, or by a steady air flow generated by a fan, respectively. A suitably-positioned rotatable disk having one or more void regions, and in a state of rotation, interrupts the air circulation or flow pattern by causing a pulsation air pattern at the surface of the electronic carrier assembly. The effect of the pulsating air pattern is to increase the rate of heat transfer from the electronic carrier assembly by two mechanisms. First, the thickness of the boundary layer at the surface of the electronic carrier is reduced, thereby increasing the heat transfer coefficient at the boundary layer. Second, stagnant air trapped between nearby electronic components on the electronic carrier assembly is swept away. When no fan is present, the method generates a pulsating air pattern that enhances natural convection heat transfer. When a fan is present, the disk may be positioned between the fan and the electronic carrier assembly. Alternatively, the electronic carrier assembly may be positioned between the fan and the disk. Other configurations are possible, including those having two fans, two disks, and two or more electronic carrier assemblies.
    • 一种在电子载体组件的表面形成脉动空气图案的方法。 电子载体组件包括具有附接的模块或芯片的电路卡。 通过自然对流或通过风扇产生的稳定的气流,在电子载体组件的表面上分别形成空气循环图案或流动图案。 具有一个或多个空隙区域并且处于旋转状态的适当定位的可旋转盘通过在电子载体组件的表面处引起脉动空气图案来中断空气循环或流动模式。 脉动空气模式的作用是通过两种机制来提高从电子载体组件传热的速率。 首先,电子载体表面的边界层的厚度减小,从而增加了边界层的传热系数。 第二,电子载体组件附近的电子部件之间滞留的滞留空气被扫除。 当不存在风扇时,该方法产生增强自然对流传热的脉动空气模式。 当存在风扇时,盘可以位于风扇和电子承载器组件之间。 或者,电子载体组件可以位于风扇和盘之间。 其他配置是可能的,包括具有两个风扇,两个盘和两个或更多个电子载体组件的构造。