Products with functional fluid channels can transfer mass or energy and have been widely used in various fields, including aerospace, robotic, and biomedical applications. The manufacturing of these products with complex fluid channels is usually difficult for conventional fabrication methods; thus, a portion of the fluid flow function must be sacrificed to realize the feasible and smooth fabrication. Additive manufacturing not only provides a new way to manufacture the products with complex internal channels but also highlights design revolution for existing products with regular internal channels currently limited by conventional fabrication methods. To date, many publications have been reported on the design and manufacture of products with functional fluid channels, but there is a lack of an overview on this topic. In this paper, the current state of additively manufactured products with fluid channels are reviewed. Different functional fluid channels in heat exchangers, fluid power components, bipolar plates of proton exchange membrane fuel cells, and artificial blood vessels are summarized, and the challenges and further direction of additively manufactured products with functional fluid channels are also discussed.

具有功能性流体通道的产品可以传递质量或能量，并且已广泛用于各个领域，包括航空航天，机器人和生物医学应用。这些具有复杂流体通道的产品的制造通常对于传统的制造方法来说是困难的。因此，必须牺牲一部分流体流动功能以实现可行和平滑的制造。增材制造不仅提供了一种制造具有复杂内部通道的产品的新方法，而且还突出了目前具有常规内部方法所限制的具有常规内部通道的现有产品的设计革命。迄今为止，已经报道了许多关于具有功能性流体通道的产品的设计和制造的出版物，但是缺乏对该主题的概述。在本文中，回顾了带有流体通道的增材制造产品的当前状态。总结了换热器中不同的功能性流体通道，流体动力组件，质子交换膜燃料电池的双极板和人造血管，并讨论了具有功能性流体通道的增材制造产品的挑战和进一步的方向。