Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizen kinja for the clue delivery! CTOnews.com news on October 26, according to Xi'an Aerospace Power Research Institute, at noon on October 23, China's first high-altitude pump rear high-thrust liquid oxygen kerosene engine carried out a 300s long-distance test run, which was a complete success. The engine has the characteristics of high specific impulse and low starting inlet pressure, and will be used in the two-stage power plant of the new generation of manned launch vehicle in China.

Since September 28, the engine has completed three 650s test runs, three battles and three victories, and each index of the engine basically meets the overall requirements, indicating that all the key technologies of the engine have been broken through.

According to reports, the scheme of the extension section of the large-size titanium alloy nozzle is a core key technology of the high-altitude pump rear swing high-thrust liquid oxygen kerosene engine, and it is also the first application of the large-size regenerative cooling titanium alloy nozzle in the model. compared with the traditional copper-steel nozzle, it has the outstanding advantage of light weight, which can greatly improve the thrust-to-mass ratio of the engine, but also brings challenges such as easy deformation, difficult cooling, difficult brazing and so on.

From 2017 to 2022, the team of Xi'an Aerospace Power Research Institute joined hands with craftsmen and workers to innovate independently and search up and down. It took five years of arduous technical research, and successively broke through many key technologies such as the design, forming, dissimilar metal brazing and titanium-titanium brazing of large-size titanium alloy nozzles, and turned the drawings into reality in this test run. The scheme successfully passed the examination of 105% high operating conditions and high mixing ratio, and was equipped with the newly developed high-performance kerosene, indicating that the team has fully mastered the extension technology of large-size titanium alloy nozzles.

The low inlet pressure starting technology is another key technology of the high-altitude pump rear pendulum high-thrust liquid oxygen kerosene engine. Adhering to the development strategy of "small step and fast run", the development team gradually explored the assessment index in the three thermal tests of the engine. Taking into account the development progress and risk control, the low inlet pressure starting technology has been further verified.

The main working characteristics of the high-altitude pump rear pendulum high-thrust liquid oxygen kerosene engine were successfully obtained after three test runs, and the annual test run task was successfully concluded. The research and development team cleared the biggest "obstacle" in the development of the new generation of manned launch vehicles and laid a solid foundation for the smooth development of the new generation of manned rockets in China.

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