新技术破解航空发动机热力处理难题

Core Insights - Dalian University of Technology's mechanical engineering team has developed a rapid cooling technology for high-temperature alloy turbine discs used in next-generation fighter jet engines, addressing significant manufacturing challenges [1][2] - The new technology utilizes a combination of high-speed multi-medium jet and zoned cooling, significantly improving cooling rates and control precision compared to existing methods [1][2] Group 1: Technology Development - The team has innovated a cooling method that injects a small amount of cooling water into an air jet, creating a fine mist that enhances cooling rates and ensures thorough cooling of the disc core [1] - A computer simulation model was established to optimize nozzle layout and jet parameters, allowing for precise temperature control across different zones of the turbine disc [1] Group 2: Performance Metrics - Experimental data shows that during cooling at 1200°C, the maximum cooling rate achieved is 673°C per minute, which is 3.75 times faster than current international technologies [2] - The control range of the cooling process has increased by over 5 times, and the grain size range has improved by more than 4 times, indicating that the cooling rate and organizational control precision have reached an international leading level [2]