摘要
为提高航空发动机内、外涵分流环在多工况条件下的环境适应能力,基于Isight优化设计平台,对某缩比双涵风扇-增压级试验件的分流环模型进行气动优化设计研究。采用贝塞尔曲线参数化方法,设置多工况条件对分流环模型进行气动计算,通过拉丁超立方采样生成样本点,进行试验设计(design of experiment,DoE)分析,筛选关键变量;基于自适应模拟退火算法对关键变量自动寻优,获得综合流动损失最小的分流环优化模型,分析3种分流环型线的内外涵道在设计工况下的静压和气流速度分布。仿真结果表明:控制分流环上壁面厚度的3个设计变量对优化结果起主导作用,优化曲线呈现下凹的扁平化趋势,曲线前缘与后端曲率增大,分流环攻角减小,能够有效抑制气流分离、减小流动损失。通过贝塞尔曲线参数化与多工况优化设计,可显著改善分流环的气动性能,提高其在多工况下的适应能力。
To enhance the adaptability of the inner and outer bypass splitter ring of aero-engines under multicondition operating scenarios,a pneumatic optimization design study is conducted on the inner splitter ring model of a scaled dual-bypass fan-compressor stage test piece based on the Isight optimization design platform.The Bezier curve parameterization method is adopted to perform pneumatic calculations on the splitter ring model under set multi-condition operating conditions.Sample points are generated via Latin hypercube sampling,followed by design of experiment(DoE)analysis to screen key variables.The adaptive simulated annealing algorithm is then used for automatic optimization of these key variables,yielding an optimized splitter ring model with the minimum comprehensive flow loss.The static pressure and airflow velocity distributions in the inner and outer bypass ducts of three splitter ring profiles are analyzed under design conditions.Simulation results indicate that three design variables controlling the upper wall thickness of the splitter ring play a dominant role in the optimization outcomes.The optimized curve exhibits a concave and flattened trend,with increased curvatures at the leading and trailing edges,a reduced angle of attack of the splitter ring,which effectively suppresses flow separation and reduces flow loss.Through Bezier curve parameterization and multi-condition optimization design,the pneumatic performance of the splitter ring can be significantly improved,along with its adaptability under multi-condition operating conditions.
作者
陈德铭
马海腾
吴亚东
CHEN Deming;MA Haiteng;WU Yadong(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《内燃机与动力装置》
2026年第1期1-10,共10页
Internal Combustion Engine & Powerplant
基金
国家科技重大专项项目(2019-Ⅱ-0004-0024)。
关键词
分流环
贝塞尔曲线
多工况条件
DOE
气动优化
splitter ring
Bezier curve
multiple oprating conditions
DoE
aerodynamic optimization
