Aeroelastic prediction and analysis for a transonic fan rotor with the"hot"blade shape

• 作者: Di ZHOU Ziliang LU Tongqing GUO Guoping CHEN
• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（7）
• 页码范围: 50-61
• 页数: 12页
• 语种: 英文

摘要

This paper focuses on aeroelastic prediction and analysis for a transonic fan rotor with only its"hot"(running)blade shape available,which is often the case in practical engineering such as in the design stage.Based on an in-house and well-validated CFD solver and a hybrid structural finite element modeling/modal approach,three main aspects are considered with special emphasis on dealing with the"hot"blade shape.First,static aeroelastic analysis is presented for shape trans-formation between"cold"(manufacturing)and"hot"blades,and influence of the dynamic varia-tion of"hot"shape on evaluated aerodynamic performance is investigated.Second,implementation of the energy method for flutter prediction is given and both a regularly used fixed"hot"shape and a variable"hot"shape are considered.Through comparison,influence of the dynamic variation of"hot"shape on evaluated aeroelastic stability is also investigated.Third,another common way to predict flutter,time-domain method,is used for the same concerned case,from which the predicted flutter characteristics are compared with those from the energy method.A well-publicized axial-flow transonic fan rotor,Rotor 67,is selected as a typical example,and the corresponding numerical results and discussions are presented in detail.