A spline ROM of blade aerodynamic force to upstream wake

作者：Li Li Zhou^*; Yang Minglei; Luo Xiao; Zhang Jun; Yuan Mei Ni

来源：Aerospace Science and Technology, 2019, 84: 650-660.

DOI：10.1016/j.ast.2018.11.004

• Volterra ROM
• Aerodynamic force
• Upstream wake
• Blade
• Spline
• Identification

All related research nowadays are devoted to build ROM of aerodynamic forces induced by vibration of blades or wings. There is no discussion of ROMs of the aerodynamic forces of the blades corresponding to upstream wakes, which is more important to turbine machines' safety. In this paper, a spline Volterra ROM method is proposed to predict the blades' aerodynamic forces induced by the upstream wakes to fasten the blade-wake interaction analysis in turbine machine design. Traveling wave method is applied to simplify the inputs representing the upstream wakes. The kernels of the Volterra ROM are expressed in spline to reduce the number of parameters to be identified. The coefficients of the spline kernels are identified by minimizing the difference between ROM results and CFD data. The ROM method is used to predict a blade's aerodynamic forces under an actual wake. The results show that the ROM can capture most information of the aerodynamic forces due to the wake.

• 出版日期2019-1
• 单位太原学院; 中北大学