ABSTRACT

Four kinds of microchannels with round grooves and ribs were designed: round grooves (round), round grooves and single–sided ribs (round–single), round grooves and odd-symmetric ribs (round–odd), and round grooves and doubly symmetric ribs (round–double). The effects of rib arrangement on the heat transfer performance of microchannels with round grooves and ribs were numerically investigated and then compared with the microchannel with no grooves or ribs. The heat transfer characteristics were analyzed and compared in accordance with the field synergy principle and entropy production. Results indicate that the heat transfer field of round and round–double microchannels exhibited the smallest synergy angle (α) and the best field synergy. The round–double microchannel produced the lowest entropy caused by heat transfer and had a minimal irreversible loss; thus, it exhibited the best heat transfer performance.

摘要

设计了四种圆槽加肋微通道：圆槽（round）、圆槽单面肋（round-single）、圆槽奇对称肋（round-odd）、圆槽双对称肋骨（圆形 - 双）。数值研究了肋排列对带有圆槽和肋的微通道传热性能的影响，然后与没有槽或肋的微通道进行了比较。根据场协同原理和熵产原理对传热特性进行了分析比较。结果表明，圆形和圆形-双微通道的传热场表现出最小的协同角（α）和最好的场协同。圆双微通道产生的热传递熵最低，不可逆损失最小；因此，它表现出最好的传热性能。