Comparison of nozzle and afterbody surface pressures from wind tunnel and flight test of the YF-17 aircraft

1978 ◽  
Author(s):  
E. LUCAS ◽  
A. FANNING ◽  
L. STEERS
Keyword(s):  
Wind Tunnel ◽  
Flight Test

Post-stall flight dynamics of commercial transport aircraft configuration: A nonlinear bifurcation analysis and validation

2020 ◽  
pp. 095441002094408
Author(s):  
Fei Cen ◽  
Qing Li ◽  
Zhitao Liu ◽  
Lei Zhang ◽  
Yong Jiang
Keyword(s):  
Wind Tunnel ◽  
Bifurcation Analysis ◽  
Large Angle ◽  
Unsteady Aerodynamics ◽  
Time History ◽  
Periodic Oscillation ◽  
Flight Dynamics ◽  
Flight Test ◽  
Loss Of Control ◽  
Transport Aircraft

Loss-of-control has become the largest fatal accident category for worldwide commercial jet accidents, and any initiative aimed at preventing such events requires an understanding of the fundamental aircraft behavior, especially the flight dynamics at post-stall region at which loss-of-control usually occurred. A series of low-speed static and dynamic wind tunnel tests of the Common Research Model over a large angle of attack/sideslip envelope was conducted and a non-linear aerodynamic model was developed. The bifurcation analysis, complemented by time-history simulation was used to understand the post-stall flight dynamics and the numerical analysis results were preliminary validated by wind tunnel virtual flight test. Several representative post-stall behaviors for the transport aircraft have been identified, including departure, periodic oscillation, post-stall gyration and steep spiral, etc. Furthermore, the predicted periodic oscillation in pitch motion has been perfectly duplicated in wind tunnel virtual flight test. The approach used in this work shows a promising way to uncover the flight dynamics of transport aircraft at extreme and loss-of-control flight conditions, as well as to apply to nonlinear unsteady aerodynamics modeling and validation, flight accident investigation, advanced flight control law design or studying initiative for loss-of-control prevention or mitigation.

scholarly journals Design Optimization of Composite Curved Rod for Wind Tunnel Virtual Flight Test Based on Multi-island Genetic Algorithm

2020 ◽  
Vol 1624 ◽  
pp. 042027
Author(s):  
Peng Kong ◽  
Zhenzeng Lian ◽  
Miao He ◽  
Xiaoqiang Peng ◽  
Jin Song ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Wind Tunnel ◽  
Design Optimization ◽  
Flight Test ◽  
Curved Rod
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