TY - JOUR
T1 - Study on the effects of elastic characteristics on transonic buffet onset
AU - Gao, Chuan Qiang
AU - Zhang, Wei Wei
AU - Ye, Zheng Yin
N1 - Publisher Copyright:
© 2017, Engineering Mechanics Press. All right reserved.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Transonic buffet has a negative impact on the structural strength and fatigue life of aircraft, which may lead to flight accidents. For stationary airfoils, transonic buffet characteristics are associated with the freestream conditions, namely, the Mach number, angle of attack and Reynolds number. In this paper, a coupled method is established based on Unsteady Reynolds Averaged Navier-Stokes (URANS), and the effect of the elastic characteristics on buffet onset boundary is studied by releasing the pitching degree of freedom to serve as a variable quantity. It is discovered that the structure natural frequency has a great influence on the buffet onset boundary of the spring suspended airfoil, the system becoming unstable at a smaller angle of attack, while the mass ratio has a weak impact. The buffet onset boundary of the spring suspended airfoil is 1 degree less than that of the rigid stationary airfoil, making the elastic characteristics of the airfoil an important factor in transonic buffet studies.
AB - Transonic buffet has a negative impact on the structural strength and fatigue life of aircraft, which may lead to flight accidents. For stationary airfoils, transonic buffet characteristics are associated with the freestream conditions, namely, the Mach number, angle of attack and Reynolds number. In this paper, a coupled method is established based on Unsteady Reynolds Averaged Navier-Stokes (URANS), and the effect of the elastic characteristics on buffet onset boundary is studied by releasing the pitching degree of freedom to serve as a variable quantity. It is discovered that the structure natural frequency has a great influence on the buffet onset boundary of the spring suspended airfoil, the system becoming unstable at a smaller angle of attack, while the mass ratio has a weak impact. The buffet onset boundary of the spring suspended airfoil is 1 degree less than that of the rigid stationary airfoil, making the elastic characteristics of the airfoil an important factor in transonic buffet studies.
KW - Buffet
KW - Buffet onset
KW - Elastic characteristic
KW - Structure natural frequency
KW - Transonic flow
UR - http://www.scopus.com/inward/record.url?scp=85014474823&partnerID=8YFLogxK
U2 - 10.6052/j.issn.1000-4750.2015.05.0440
DO - 10.6052/j.issn.1000-4750.2015.05.0440
M3 - 文章
AN - SCOPUS:85014474823
SN - 1000-4750
VL - 34
SP - 243
EP - 247
JO - Gongcheng Lixue/Engineering Mechanics
JF - Gongcheng Lixue/Engineering Mechanics
IS - 1
ER -