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首页> 外文期刊>International Journal of Rotating Machinery >Design Optimization of a Transonic-Fan Rotor Using Numerical Computations of the Full Compressible Navier-Stokes Equations and Simplex Algorithm
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Design Optimization of a Transonic-Fan Rotor Using Numerical Computations of the Full Compressible Navier-Stokes Equations and Simplex Algorithm

机译：基于完全可压缩Navier-Stokes方程数值计算和单纯形算法的跨音速风扇转子的设计优化

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摘要

The design of a transonic-fan rotor is optimized using numerical computations of the full three-dimensional Navier-Stokes equations. The CFDRC-ACE multiphysics module, which is a pressure-based solver, is used for the numerical simulation. The code is coupled with simplex optimization algorithm. The optimization process is started from a suitable design point obtained using low fidelity analytical methods that is based on experimental correlations for the pressure losses and blade deviation angle. The fan blade shape is defined by its stacking line and airfoil shape which are considered the optimization parameters. The stacking line is defined by lean, sweep, and skews, while blade airfoil shape is modified considering the thickness and camber distributions. The optimization has been performed to maximize the rotor total pressure ratio while keeping the rotor efficiency and surge margin above certain required values. The results obtained are verified with the experimental data of Rotor 67. In addition, the results of the optimized fan indicate that the optimum design is found to be leaned in the direction of rotation and has a forward sweep from the hub to mean section and backward sweep to the tip. The pressure ratio increases from 1.427 to 1.627 at the design speed and mass flow rate.
机译：使用完整的三维Navier-Stokes方程的数值计算来优化跨音速风扇转子的设计。 CFDRC-ACE多物理场模块是基于压力的求解器，用于数值模拟。该代码结合了单纯形优化算法。优化过程从使用低保真度分析方法获得的合适设计点开始，该方法基于压力损失和叶片偏角的实验相关性。风扇叶片的形状由其堆叠线和翼型形状定义，它们被认为是最优化参数。堆积线由倾斜，后掠和倾斜定义，而叶片的翼型形状则根据厚度和弧度分布进行修改。已经进行了优化，以使转子总压力比最大，同时将转子效率和喘振裕度保持在某些要求值以上。转子67的实验数据验证了所获得的结果。此外，优化风扇的结果表明，发现最佳设计沿旋转方向倾斜，并且具有从轮毂到平均截面的前掠和向后的掠掠。扫到尖端。在设计速度和质量流率下，压力比从1.427增加到1.627。

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