Heat transfer and aerodynamics of complicated profiled heat transfer surfaces

In tubular recuperative heat exchangers such as "gas-gas", "gas-liquid" are mainly used heat transfer of circular tubes. However, circular tubes, as part of the heat transfer surface, in terms of improving their heat and aerodynamic performances to date have exhausted themselves. Now, technically and economically the most accessible and reasonable by reducing weight and improving energy efficiency and resource saving heat exchange equipment is application in heat exchangers surfaces that have high heat and aerodynamic efficiency, low cost and ease of production.