The improvement and development of sealing technology is an area with great potential; with the improvement of engine thermal cycle parameters, the sealing working conditions have also increased significantly, and the current sealing technology can no longer meet the requirements. Reducing the sealing leakage of the secondary flow path can greatly improve the performance of the engine.
IHPTET plans to reduce the leakage of the secondary flow path by 65% in the target phase. After entering the mid-1980s, several countries with advanced aero engine technology have listed the development of new sealing technology as the “frontline force for the development of the next generation of high-performance aero-engines.” “It has invested a lot of manpower and financial resources, and development activities have been extremely active.
The brush seal has been recognized as the most simple, practical and effective replacement product for the tooth seal. The British R.R Company first proposed the concept of brush seal in 1970, and took the lead in applying it to the RB199 engine based on research and development. The United States introduced British brush seal technology in 1984, pushing the research and development of brush seals into full swing.
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