HEAT EXCHANGER ARTICLE WITH HOLLOW TUBE HAVING PLURALITY OF VANES

摘要

A heat exchanger article (22) includes a hollow tube (24) that has a tube wall (26) with an interior surface (26a) and an exterior surface (26b). The interior surface (26a) defines a flow passage (28) through the hollow tube (24). The hollow tube (24) also includes a vane cluster (30) in the flow passage (28). The vane cluster (30) includes a plurality of vanes (32) and each of the vanes (32) extends inwardly from the tube wall (26).