高温气体密封技术研究进展与变马赫数喷管应用分析

A comprehensive review of high-temperature gas sealing technologies in the aerospace industry， encompassing high-temperature-resistant adhesives， high-temperature static seals， and high-temperature dynamic sealing technologies， along with their associated leakage theories and performance testing methodologies， was performed. It synthesized the principal research findings on high-temperature gas sealing from both domestic and international sources， and evaluated their suitability and potential for optimization in large-scale sealing systems for high-temperature variable Mach-number nozzles under extreme operating conditions. Over recent years， there has been notable progress in several areas: enhancing the heat resistance of high-temperature-resistant adhesives， refining the structures of high-temperature gas seals， conducting experimental research on the resilience， leakage performance， and abrasion resistance of seals， establishing leakage models for high-temperature gas seals， and developing platforms for testing sealing performance. Despite these advancements， research on large-scale sealing systems under extreme conditions was still in a development phase. Future research on sealing systems for high-temperature variable Mach number nozzles should concentrate on resilience of the sealing system，maintenance of sealing effectiveness，motion characteristics，failure mechanisms，and life prediction. These focal points are crucial for advancing technologies in related fields.