【摘要】 针对某离心压气机紧凑型通道扩压器，提出一种一体式叶片扩压器设计和优化方法。将轮毂曲线由常规扩压器的“直线-圆弧-直线”的形式，变为由Beizer曲线构造的“鼓包”形状，从而在保持较小的扩压器径向直径的条件下，减小轮毂转弯段的曲率，抑制轮毂处气流分离。同时增大前缘半径以增加转静子之间径向间距，将该扩压器叶片分为前、中、后3段进行优化参数探索，最终选取4类参数对扩压器进行优化。通过数值模拟对比得：优化后，离心压气机设计点压比增加1.84%，设计点效率提升2.5%，喘振裕度增加8.13%。更多还原

【Abstract】 An integrated blade diffuser design and optimization method is developed for a compact channel diffuser of centrifugal compressors. The hub curve, originally in the form of a “straight-arc-straight” configuration as seen in conventional diffusers, is transformed into a “bulged” shape constructed one using Bezier curves. This modification reduces the curvature of the hub’s turning section, suppressing flow separation at the hub while maintaining a small radial diameter for the diffuser. Additionally, the leading-edge radius is increased to expand the radial clearance between the rotor and stator. The diffuser blades are divided into the front, the middle, and the rear sections for optimization parameter exploration. Four sets of parameters are selected for optimization. Numerical simulations reveal that after optimization, the centrifugal compressor’s pressure ratio at the design points increased by 1.84%, the efficiency is improved by 2.5%, and the surge margin is increased by 8.13%.更多还原