Research on structures and welding methods of primary surface heat exchangers

Abstract Primary surface heat exchangers (PSHEs) are used more and more all over the world in aerospace, power, and airplane areas due to their micro-size and excellent heat transfer efficiency. In this paper, at first, the development of different structures of (PSHEs) was summarized. Then, the advantages and disadvantages and application of different structures of PSHEs were analyzed. Finally, the different welding methods of the ultra-thin stainless plate were researched in this paper, the results show that the three kinds of methods, micro-beam plasma arc welding, laser welding, and pulsed TIG filling wire welding, can be used to weld (PSHEs).