A bionic concept originating from the mechanism of gastric mucosa protecting a gastric wall from corrosion by gastric acid is creatively proposed, with the intention of finding a new way to reduce the corrosion of insulation coatings in liquid metal blankets. A compatible fluid barrier that mimics the function of gastric mucosa is used to prevent the flowing liquid metal from contacting the inner wall of a loop pipeline. The design of the bionic structure and the control of the barrier fluid are the most critical and difficult. A single-channel simulation is performed using Computational Fluid Dynamics (CFD) analysis to evaluate the effect of a compatible fluid barrier on separating the liquid lithium and insulation coating. The results show that the compatible fluid barrier can completely cover the inner wall of the pipeline within which the liquid metal is flowing, indicating that the bionic design can eliminate the corrosion of insulation coatings with flowing liquid lithium. Based on this, a compatible fluid barrier is investigated with multiple conditions, including the coverage area and film thickness, by changing the velocity ratio of the lithium to the barrier fluid, the shape of the inlet port, and the curvature radius of the bend pipes. In addition, an S-shaped pipe is confirmed to be completely corrosion free. This bionic concept is aimed at all corrosive liquid metals, and this work only starts with the extreme case of pure lithium. This work is expected to provide a preliminary feasibility basis for anti-corrosion design for a pipeline with dual fluids.

创造性地提出了源自胃黏膜保护胃壁免受胃酸腐蚀机制的仿生概念，旨在寻找一种新的方法来减少液态金属毯中绝缘涂层的腐蚀。模拟胃粘膜功能的相容流体屏障用于防止流动的液态金属接触回路管道的内壁。仿生结构的设计和阻隔液的控制是最关键和最困难的。使用计算流体动力学 (CFD) 分析进行单通道模拟，以评估相容的流体屏障对分离液态锂和绝缘涂层的影响。结果表明，相容流体屏障可以完全覆盖液态金属在其中流动的管道内壁，表明仿生设计可以消除液态锂对绝缘涂层的腐蚀。在此基础上，通过改变锂与阻隔流体的速度比、入口形状和弯管的曲率半径，研究了覆盖面积和膜厚等多种条件下的兼容流体阻隔。 . 此外，S 形管被证实是完全无腐蚀的。这种仿生概念针对所有腐蚀性液态金属，而这项工作仅从纯锂的极端情况开始。该工作有望为双流体管道的防腐设计提供初步的可行性依据。