关键词: 动静混合气体轴承;有限差分法;牛顿迭代;承载能力

Abstract: The performance of high-speed hybrid gas bearings for rotating ramjet was studied theoretically and numerically to fulfill the requirement of bearing support for rotating ramjet.The gas supply pressure was determined firstly by the work condition of the rotating ramjet.By employing the Newton method and finite difference method,the Reynolds equations for the gas flow in the bearings were solved.The pressure distributions of the hybrid bearings with different eccentricities and rotating speed were obtained and the coupling mechanics of aerostatic and aerodynamic was analyzed.And also the number of orifices sets,which has effect on the pressure distribution and load capacity,was discussed.The maximum rotor weights for different rotating speeds and orifices set numbers,which the hybrid gas bearings could provide,were listed to establish the foundation for the design of rotating ramjet rotor system.

Key words: Hybrid gas bearings;Finite difference method;Newton method;Load capacity