TY - GEN
T1 - Sensing unsteady pressure on mav wings
T2 - 5th AEROTECH conference
AU - Marino, Matthew James
AU - Watkins, Simon
AU - Sabatini, Roberto
AU - Gardi, Alessandro
N1 - Publisher Copyright:
© (2014) Trans Tech Publications, Switzerland.
PY - 2014
Y1 - 2014
N2 - Experiments at low Reynolds numbers were performed on a pressure tapped NACA 2313 wing in a 3 × 2 × 9 meter wind tunnel under nominally smooth (Ti = 1.2%) and turbulent (Ti = 7.2%) flows at a mean flow velocity of 8ms-1 (Re -120,000). The NACA 2313 wing is a replica of Micro Air Vehicle (MAV) wing of the Flash 3D aircraft used at RMIT University for research purposes. Unsteady surface pressures were measured to understand if the information could be adopted for resolving turbulence-induced perturbations and to furthermore use it in a turbulence mitigation system. Two span-wise locations of chord-wise pressure were acquired when tested under the two different flow conditions. It was discovered that at both span-wise locations, a local Coefficient of Pressure (Cp) held high correlation to the chord-wise Cp integration and allowed for a linear relationship to be formed between the two variables. The defined relationship provided a 95%) confidence for angles of attack below stall and was used to estimate the integrated chord-wise pressure coefficient at a particular span wise location. The relationship between a single pressure tap and the integrated Cp of that chord-wise section was valid for the two different span-wise locations with similar defining equations. As one pressure tap is sufficient to adequately estimate the integrated Cp on a chord-wise wing section, a limited amount of pressure taps across the wings span approximates the pressure distribution across the span and eventually approximates the flight perturbations. Being a novel method of sensing aircraft disturbance, applications are not restricted to MAV. The methodology presented could very well be applied to larger aircraft to reduce the effects of turbulence within the terminal area and can provide other means of active stabilization.
AB - Experiments at low Reynolds numbers were performed on a pressure tapped NACA 2313 wing in a 3 × 2 × 9 meter wind tunnel under nominally smooth (Ti = 1.2%) and turbulent (Ti = 7.2%) flows at a mean flow velocity of 8ms-1 (Re -120,000). The NACA 2313 wing is a replica of Micro Air Vehicle (MAV) wing of the Flash 3D aircraft used at RMIT University for research purposes. Unsteady surface pressures were measured to understand if the information could be adopted for resolving turbulence-induced perturbations and to furthermore use it in a turbulence mitigation system. Two span-wise locations of chord-wise pressure were acquired when tested under the two different flow conditions. It was discovered that at both span-wise locations, a local Coefficient of Pressure (Cp) held high correlation to the chord-wise Cp integration and allowed for a linear relationship to be formed between the two variables. The defined relationship provided a 95%) confidence for angles of attack below stall and was used to estimate the integrated chord-wise pressure coefficient at a particular span wise location. The relationship between a single pressure tap and the integrated Cp of that chord-wise section was valid for the two different span-wise locations with similar defining equations. As one pressure tap is sufficient to adequately estimate the integrated Cp on a chord-wise wing section, a limited amount of pressure taps across the wings span approximates the pressure distribution across the span and eventually approximates the flight perturbations. Being a novel method of sensing aircraft disturbance, applications are not restricted to MAV. The methodology presented could very well be applied to larger aircraft to reduce the effects of turbulence within the terminal area and can provide other means of active stabilization.
KW - Micro air vehicle (MAV)
KW - Pressure sensing
KW - Turbulence
KW - Unmanned aerial systems (UAS)
KW - Unsteady pressure
UR - http://www.scopus.com/inward/record.url?scp=84921680876&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.629.48
DO - 10.4028/www.scientific.net/AMM.629.48
M3 - Conference contribution
AN - SCOPUS:84921680876
T3 - Applied Mechanics and Materials
SP - 48
EP - 54
BT - AEROTECH V
A2 - Romli, Fairuz I.
A2 - Majid, D.L.
A2 - Mustapha, Faizal
A2 - Romli, Fairuz I.
A2 - Majid, D.L.
A2 - Mustapha, Faizal
A2 - Varatharajoo, Renuganth
A2 - Romli, Fairuz I.
A2 - Ahmad, Kamarul Arifin
A2 - Majid, D.L.
A2 - Mustapha, Faizal
A2 - Varatharajoo, Renuganth
A2 - Romli, Fairuz I.
A2 - Ahmad, Kamarul Arifin
A2 - Majid, D.L.
A2 - Mustapha, Faizal
Y2 - 29 October 2014 through 30 October 2014
ER -