Application and development of end-wall profiling in turbomachinery

Reviewed was the evolution of a new design technology-end-wall profiling technology, which can reduce secondary flow losses in the zones around end-walls. The technology may enhance the thermal efficiency of a turbine, and has been widely verified with relevant conclusions being adopted directly in engineering projects. Although the research for applying the above technology in compressors is somehow delayed in comparison with that in turbines, the latest research findings show that the technology has played a definite role in such efforts as changing the shock wave structure of a transonic compressor, improving its stable operating margin and reducing the separation of flows in the corners of stationary blades. The technology in question reflects the research tendency of utilizing complex profiles to enhance turbomachine performance, and merits further study and investigation in the future by researchers.