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针对大涵道比风扇静叶尖、根稠度不匹配问题,为补偿静叶叶尖稠度、增大叶尖载荷、抑制叶尖的气流分离,提出一种在静叶叶尖引入低叶片结构的新型高低静叶结构,并通过相应数值模拟分析检验高低静叶结构在大涵道比风扇静子应用的有效性。结果表明:低叶片的引入有效抑制静叶叶尖的气流分离,改善流道内的流场结构,在单静子环境下,静叶级的扩压能力提升1.52%,总压损失降低23.6%;在级环境下,静叶级的扩压能力提升0.93%,总压损失降低15.0%;并且高低静叶结构在级环境下表现出较好的扩稳能力,流量裕度可提高53.8%;低叶片长度影响高低静叶结构性能,存在最优的低叶片长度。
In order to compensate the mismatch of root tip consistency and root consistency of large bypass ratio fan, in order to compensate the tip consistency, increase the tip load and restrain the air flow separation, a new method of introducing low leaf structure New high and low static leaf structure, and through the corresponding numerical simulation analysis to verify the effectiveness of high and low vane structure in large bypass ratio fan stator application. The results showed that the introduction of low blade effectively restrained the air flow separation at the tip of the stationary blade and improved the flow field structure. Under the single static condition, the static pressure at the vane stage increased by 1.52% and the total pressure loss decreased by 23.6% Class environment, the vane-level diffuser capacity increased by 0.93%, the total pressure loss decreased by 15.0%; and the high and low static leaf structure in the grade environment showed better ability to stabilize, flow margin can be increased 53.8%; low blade Length affects the structure of high and low vane structure, there is the optimal low blade length.