Virtual Sensor for the Angle-of-Attack Signal in Small Commercial Aircraft

2006 ◽  
Author(s):  
M. Oosterom ◽  
R. Babuska
Keyword(s):  
Angle Of Attack ◽  
Commercial Aircraft ◽  
Virtual Sensor

Computational analysis of the aerodynamic performance of a jet-flap airfoil in transonic flow

2012 ◽  
Vol 226 (6) ◽  
pp. 664-678 ◽  
Author(s):  
V Mantič-Lugo ◽  
G Doulgeris ◽  
A Gohardani ◽  
R Singh
Keyword(s):  
Flow Control ◽  
Active Flow Control ◽  
Angle Of Attack ◽  
Aircraft Design ◽  
Civil Aviation ◽  
Commercial Aircraft ◽  
Angle Variation ◽  
Distributed Propulsion ◽  
Lift And Drag ◽  
Active Flow

The needed shift in next generation aircraft design is expected to bring novel concepts for civil aviation as the jet-flap wing. The aircraft efficiency improvements with the jet-flap wing directs its use for future aircraft designs reinforced by the tendency for more synergistic systems as active flow control, boundary layer ingestion and distributed propulsion, making the jet-flap wing a very suitable option for the latter concept. The analysis carried out in this paper is aimed at the application of the jet-flap wing concept for manoeuvrability and cruise efficiency improvement of an airliner. A 2D computational model of a jet-flapped transonic airfoil is developed in order to assess the jet-flap wing technology for a commercial aircraft at cruise conditions. This paper provides an insight into the parameters that affect the performance of a jet-flap under various flight conditions. To do this, a general parametrical analysis is performed, studying numerically the influences of main flow parameters like Mach number, Reynolds number, angle of attack, jet deflection angle and jet thickness. Changes in pressure distribution and flow circulation around the airfoil yield strong modifications in lift and drag due to jet angle variation. Improvements are encountered in the performance of an airfoil with a jet-flap system compared with a standard airfoil with no jet. Enhancements in lift and reduction in drag, as well as an increase of the lift-to-drag ratio is possible with a proper combination of the jet deflection and the angle of attack of the airfoil. In summary, this paper shows the conditions under which the benefits of the jet-flapped wing, for lift enhancement and manoeuvrability as an active flow control are promising.

Analysis of the Effects of Using Different Nozzles and Angle of Attack in Miniature Commercial Aircraft with Vertical Lift Using CFD

2014 ◽  
Vol 984-985 ◽  
pp. 1195-1203
Author(s):  
P.T. Aravindhan ◽  
P.T. Anandhan
Keyword(s):  
Free Stream ◽  
Pressure Coefficient ◽  
Angle Of Attack ◽  
Pressure Variation ◽  
Attack Angle ◽  
Cfd Analysis ◽  
Commercial Aircraft ◽  
Convergent Nozzle ◽  
Viscous Forces ◽  
Vertical Lift

— The objective of the work is to compare between convergent, convergent-divergent nozzle and to analyse which has better performance in a miniature aircraft having vertical lift system. Comparison is done by having 2° and 4° attack angle at a free stream mach no 0.8 and to find the variation of pressures around, drag. CFD analysis has been performed for the miniature aircraft. Pressure forces, viscous forces, pressure coefficient and viscous coefficient are found for convergent nozzle and convergent-divergent nozzle. Also pressure variation at 2 ° and 4 ° angle of attack for Airfoil types AIG(smart fish) and NACA(Conventional) are found. It was found convergent-divergent nozzle is best suited with vertical lift having exit jet velocity 2700m/s. It is also found that airfoil produce less drag when attack angle is 4 °

424. Heat Stress During Fuel Tank Entry and Maintenance Activities on U.S. Air Force and Commercial Aircraft

1999 ◽  
Author(s):  
G. Kinnes ◽  
P. Jensen ◽  
K. Mead ◽  
D. Watkins ◽  
L. Smith ◽  
...  
Keyword(s):  
Heat Stress ◽  
Air Force ◽  
Fuel Tank ◽  
Commercial Aircraft ◽  
Maintenance Activities

Positioning the Angle of Attack Sensor on an Unmanned Aerial Vehicle Wing

2016 ◽  
Vol 3 (1) ◽  
pp. 25-33
Author(s):  
Amir Birjandi ◽  
◽  
Valentin Guerry ◽  
Eric Bibeau ◽  
Hamidreza Bolandhemmat ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Angle Of Attack ◽  
Aerial Vehicle

Virtual Sensor Idea-Based Geolocation Using RF Multipath Diversity

2016 ◽  
Vol E99.A (10) ◽  
pp. 1799-1805
Author(s):  
Zhigang CHEN ◽  
Lei WANG ◽  
He HUANG ◽  
Guomei ZHANG
Keyword(s):  
Virtual Sensor ◽  
Multipath Diversity
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