水下航行器小通道内蒸汽换热实验研究

为研究水下航行器小通道内的蒸汽换热特性，对采用矩形通道设计的冷凝通道进行实验研究，分析不同蒸汽入口温度对通道换热特性的影响。实验结果表明：矩形小通道具有较好的冷凝换热效果，通道总平均换热量、热流密度以及通道出口冷凝液温度均随通道入口蒸汽温度升高而升高。但总传热系数和蒸汽侧换热系数随通道入口蒸汽温度升高而降低。最后在实验数据基础上，将实验值与仿真值进行对比分析，修正仿真模型，确定过热蒸汽冷凝成水的过程中相变点位置，为后续闭式循环动力系统壳体冷凝器的设计提供依据和参考。

Experimental investigation of the heat transfer in small channels of the underwater vehicle

In order to study the characteristics of steam heat transfer in a small channel of the underwater vehicle. This article researched the experimental investigation of the condensation heart transfer in small channels, and analyzed the different steam inlet temperatures on heat transfer characteristics of channels. The experimental results show that the small rectangular channel has good condensing heat transfer effect, the channel overall average heat transfer, heat flux and export condensate temperature were increased with the channel inlet steam temperature become high, but the total heat transfer coefficient and steam side heat transfer coefficient were decreasedwith the channel inlet steam temperature were increased. Finally, the paper compared the experimental value and simulation analysison the basis of experimental data, and verified the simulation model, and the superheated steam condensation water was determined in the process of phase transformation point location, being provided for the design of power system shell condenser of the subsequent closed cycle power system shell condenser.