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Works (54)
Updated: June 3rd, 2024 08:14
2024 journal article
Lift tailoring on unsteady airfoils with leading-edge vortex shedding using an inverse aerodynamic approach
PHYSICS OF FLUIDS, 36(5).
open access via pubs.aip.org (publisher PDF)
Source: Web Of Science
Added: May 28, 2024
2023 article
Discrete vortex modeling of perching and hovering maneuvers
Narsipur, S., Ramesh, K., Gopalarathnam, A., & Edwards, J. R. (2023, May 31). THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS, Vol. 5.
author keywords: Aerodynamics; Unsteady flows; LESP; Vortex dynamics
Sources: Web Of Science, NC State University Libraries
Added: June 19, 2023
2023 article
Modulation and Annihilation of Aeroelastic Limit-Cycle Oscillations Using a Variable-Frequency Disturbance Generator
Hughes, M. T., Gopalarathnam, A., & Bryant, M. (2023, February 7). AIAA JOURNAL.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: February 27, 2023
2023 article
Numerical Study of Circular-Cylinder Disturbance Generators with Rigid Splitter Plates
Jenkins, M., Babu, A. V. S., Bryant, M., & Gopalarathnam, A. (2023, October 31). AIAA JOURNAL.
author keywords: Vortex Induced Vibrations; Unsteady Reynolds Averaged Navier Stokes; Numerical Simulation; Computational Fluid Dynamics; Vortex Shedding; Unsteady Flows; Bluff Body Aerodynamics; Vortex Generators; Shear Layers; Vortex Wake
Source: Web Of Science
Added: November 13, 2023
2023 article
Prediction of leading-edge-vortex initiation using criticality of the boundary layer
Ramanathan, H., & Gopalarathnam, A. (2023, May 13). THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS, Vol. 5.
author keywords: Unsteady aerodynamics; LESP; Separated flows; Boundary layer separation; Vortical flows
Sources: Web Of Science, ORCID, NC State University Libraries
Added: May 22, 2023
2022 journal article
Leading-Edge Suction Behavior of Unsteady Airfoils in Forward and Reverse Flows
JOURNAL OF THE AMERICAN HELICOPTER SOCIETY, 68(2).
Source: Web Of Science
Added: August 21, 2023
2022 journal article
Leading-edge-vortex tailoring on unsteady airfoils using an inverse aerodynamic approach
PHYSICS OF FLUIDS, 34(5).
Source: Web Of Science
Added: May 31, 2022
2022 article
Low-Order Modeling of Dynamic Stall on Airfoils in Incompressible Flow
Narsipur, S., Gopalarathnam, A., & Edwards, J. R. (2022, September 7). AIAA JOURNAL, Vol. 9.
Sources: Web Of Science, NC State University Libraries
Added: November 28, 2022
2022 article
Novel Surface Flow-Reversal Sensor Applied to Detection of Airfoil Stall
Aleman, M. A., Gopalarathnam, A., & Granlund, K. (2022, May 13). JOURNAL OF AIRCRAFT, Vol. 5.
Sources: Web Of Science, ORCID, NC State University Libraries
Added: May 16, 2022
2021 journal article
Flow criticality governs leading-edge-vortex initiation on finite wings in unsteady flow
JOURNAL OF FLUID MECHANICS, 910.
author keywords: swimming; flying; vortex shedding; boundary layer separation
Sources: Web Of Science, NC State University Libraries
Added: February 1, 2021
2021 journal article
Leading-edge flow sensing for detection of vortex shedding from airfoils in unsteady flows
PHYSICS OF FLUIDS, 33(8).
Source: Web Of Science
Added: September 20, 2021
2021 journal article
Low-Order Modeling of Wingtip Vortices in a Vortex Lattice Method
AIAA JOURNAL, 60(3), 1708–1720.
Source: Web Of Science
Added: July 5, 2022
2021 journal article
Theoretical and experimental investigation of an unsteady airfoil in the presence of external flow disturbances
JOURNAL OF FLUID MECHANICS, 921.
author keywords: vortex dynamics
UN Sustainable Development Goal Categories
13. Climate Action
(OpenAlex)
Source: Web Of Science
Added: July 19, 2021
2020 journal article
Aeroelastic inverse: Estimation of aerodynamic loads during large amplitude limit cycle oscillations
JOURNAL OF FLUIDS AND STRUCTURES, 98.
author keywords: Nonlinear aeroelasticity; Limit cycle oscillation; Aeroelastic inverse; Power analysis
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: October 26, 2020
2020 journal article
Amplitude Annihilation in Wake-Influenced Aeroelastic Limit-Cycle Oscillations
AIAA JOURNAL, 58(9), 4117–4127.
Source: Web Of Science
Added: September 28, 2020
2020 journal article
Artificial Lumbered Flight for Autonomous Soaring
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS, 43(3), 553–566.
TL;DR:
This paper presents an autonomous soaring strategy that exploits updraft energy indepenence for small-class fixed-wing unmanned aerial vehicles.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: March 10, 2020
2020 journal article
Limit cycle characterization of an aeroelastic wing in a bluff body wake
JOURNAL OF FLUIDS AND STRUCTURES, 95(0).
Source: Web Of Science
Added: May 26, 2020
2020 journal article
Low-Order Method for Prediction of Separation and Stall on Unswept Wings
JOURNAL OF AIRCRAFT, 58(3), 420–435.
TL;DR:
Results from the method, presented for unswept wings having various airfoils, aspect ratios, taper ratios, and small, quasi-steady roll rates, are shown to agree well with experimental results in the literature, and computational solutions obtained as part of the current work.
(via Semantic Scholar)
Source: Web Of Science
Added: January 10, 2022
2020 journal article
Variation of leading-edge suction during stall for unsteady aerofoil motions
JOURNAL OF FLUID MECHANICS, 900.
author keywords: boundary layer separation; vortex dynamics; vortex shedding
UN Sustainable Development Goal Categories
13. Climate Action
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 31, 2020
2019 journal article
Aerodynamic Sails for Passive Guidance of High-Altitude Balloons: Static-Stability and Equilibrium Performance
JOURNAL OF AIRCRAFT, 56(5), 1849–1857.
TL;DR:
This work presents a trajectory control system capable of passively guiding a high-altitude balloo guided by a computer model of balloon trajectory control.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: October 28, 2019
2019 article
Model Reduction in Discrete-Vortex Methods for Unsteady Airfoil Flows
SureshBabu, A. V., Ramesh, K., & Gopalarathnam, A. (2019, April). AIAA JOURNAL, Vol. 57, pp. 1409–1422.
TL;DR:
Discrete-vortex methods are a class of low-order methods widely used to study unsteady aerodynamic phenomena, however, these methods demand high computational costs when subject to large number of ...
(via Semantic Scholar)
Source: Web Of Science
Added: May 28, 2019
2019 journal article
Vortex-Sheet Representation of Leading-Edge Vortex Shedding from Finite Wings
JOURNAL OF AIRCRAFT, 56(4), 1626–1640.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: September 16, 2019
2018 journal article
Leading-Edge Flow Sensing for Aerodynamic Parameter Estimation
AIAA JOURNAL, 56(12), 4706–4718.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: December 31, 2018
2018 journal article
Low-Order Model for Prediction of Trailing-Edge Separation in Unsteady Flow
AIAA JOURNAL, 57(1), 191–207.
Sources: Web Of Science, NC State University Libraries
Added: February 4, 2019
2017 journal article
Leading-edge flow criticality as a governing factor in leading-edge vortex initiation in unsteady airfoil flows
THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS, 32(2), 109–136.
author keywords: LESP; LEV; Vortex dynamics; Unsteady aerodynamics; Low Reynolds number; Flow separation
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018
2016 article
A piezoelectric shear stress sensor
SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2016, Vol. 9803.
author keywords: PMN-33% PT crystal; bimorph piezoelectric structures; floating element; electromechanical symmetry
Source: Web Of Science
Added: August 6, 2018
2016 article
Computational Aerodynamic Modeling Tools for Aircraft Loss of Control
Frink, N. T., Murthy, P. C., Atkins, H. L., Viken, S. A., Petrilli, J. L., Gopalarathnam, A., & Paul, R. C. (2017, April). JOURNAL OF GUIDANCE CONTROL AND DYNAMICS, Vol. 40, pp. 789–803.
TL;DR:
This paper summarizes the status of ongoing NASA research supported over the past eight years to advance computational capabilities for modeling civil aircraft loss of control due to airframe damage or wing stall to create augmented flight simulation models that improve pilot training for such loss-of-control scenarios.
(via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018
2016 journal article
Piezoelectric Floating Element Shear Stress Sensor for the Wind Tunnel Flow Measurement
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 64(9), 7304–7312.
author keywords: Bimorph piezoelectric (PE) structures; electromechanical symmetry; floating element (FE); PMN-33% PT crystal; shear stress
TL;DR:
An analytical model was proposed based on cantilever beam theory with an end-tip-mass for verifying the resonance frequency shift in static stress measurements and the signal-to-noise ratio (SNR) and ambient vibration-filtered pure shear stress sensitivity were obtained through signal processing.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2015 journal article
Development and Testing of a Passive Variable-Pitch Propeller
Journal of Aircraft, 52(3), 748–763.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science; OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2015 journal article
Limit-cycle oscillations in unsteady flows dominated by intermittent leading-edge vortex shedding
Journal of Fluids and Structures, 55, 84–105.
author keywords: Leading-edge vortices; Limit-cycle oscillations; Unsteady aerodynamics; Discrete-vortex method; 2DOF airfoil; Nonlinear aeroelasticity
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2014 journal article
Discrete-vortex method with novel shedding criterion for unsteady aerofoil flows with intermittent leading-edge vortex shedding
Journal of Fluid Mechanics, 751, 500–538.
author keywords: computational methods; separated flows; vortex interactions
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018
2014 journal article
Drag reduction on aircraft configurations with adaptive lifting surfaces
Aerospace Science and Technology, 34, 35–44.
author keywords: Configuration aerodynamics; Drag reduction; Adaptive wings; Aircraft aerodynamics; Aircraft design
Sources: Web Of Science, Crossref
Added: August 6, 2018
2014 journal article
Iteration schemes for rapid post-stall aerodynamic prediction of wings using a decambering approach
International Journal for Numerical Methods in Fluids, 76(4), 199–222.
author keywords: nonlinear aerodynamics; stall; flight dynamics; viscous effects; Newton iteration; wing aerodynamics
Sources: Web Of Science, Crossref
Added: August 6, 2018
2013 journal article
An unsteady airfoil theory applied to pitching motions validated against experiment and computation
Theoretical and Computational Fluid Dynamics, 27(6), 843–864.
author keywords: Unsteady aerodynamics; Airfoil aerodynamics; Leading-edge vortex
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation
(OpenAlex)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018
2012 journal article
Drag Reduction Methodology for Adaptive Tailless Aircraft
Journal of Aircraft, 49(1), 161–172.
Sources: Web Of Science, Crossref
Added: August 6, 2018
2012 journal article
High-Downforce Airfoil Design for Motorsports
SAE International Journal of Materials and Manufacturing, 5(2), 478–489.
Source: Crossref
Added: December 16, 2019
2012 journal article
Investigation of a bio-inspired lift-enhancing effector on a 2D airfoil
Bioinspiration & Biomimetics, 7(3), 036003.
MeSH headings : Aircraft; Animals; Biomimetic Materials; Biomimetics / instrumentation; Birds / physiology; Computer Simulation; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Flight, Animal / physiology; Models, Biological; Movement / physiology; Wings, Animal / physiology
TL;DR:
Oil flow visualization on theAirfoil with and without the fixed-angle effectors proved that the effector causes the separation point to move aft on the airfoil, as compared to the clean airfoils, which is thought to be the main mechanism by which an effector improves both lift and drag.
(via Semantic Scholar)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2011 article
Investigations of Lift-Based Pitch-Plunge Equivalence for Airfoils at Low Reynolds Numbers
McGowan, G. Z., Granlund, K., Ol, M. V., Gopalarathnam, A., & Edwards, J. R. (2011, July). AIAA JOURNAL, Vol. 49, pp. 1511–1524.
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018
2010 journal article
Flight Test of Stable Automated Cruise Flap for an Adaptive Wing Aircraft
Journal of Aircraft, 47(4), 1178–1188.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2009 journal article
Computation vs. Experiment for High-Frequency Low-Reynolds Number Airfoil Plunge
International Journal of Micro Air Vehicles, 1(2), 99–119.
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation
(OpenAlex)
Source: Crossref
Added: August 28, 2020
2009 journal article
Development of Stable Automated Cruise Flap for an Aircraft with Adaptive Wing
Journal of Aircraft, 46(1), 301–311.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2009 journal article
Ideal Lift Distributions and Flap Angles for Adaptive Wings
Journal of Aircraft, 46(2), 562–571.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2006 journal article
Poststall Prediction of Multiple-Lifting-Surface Configurations Using a Decambering Approach
Journal of Aircraft, 43(3), 660–668.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Sources: Web Of Science, Crossref
Added: August 6, 2018
2005 article
Ideal aerodynamics of ground effect and formation flight
JOURNAL OF AIRCRAFT, Vol. 42, pp. 1188–1199.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2005 article
Incorporation of aircraft performance considerations in inverse airfoil design
JOURNAL OF AIRCRAFT, Vol. 42, pp. 199–207.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2005 journal article
Inverse design of adaptive airfoils with aircraft performance considerations
Journal of Aircraft, 42(6), 1622–1630.
Source: NC State University Libraries
Added: August 6, 2018
2003 journal article
Design of low Reynolds number airfoils with trips
JOURNAL OF AIRCRAFT, 40(4), 768–775.
Source: Web Of Science
Added: August 6, 2018
2003 journal article
Optimum downwash behind wings in formation flight
JOURNAL OF AIRCRAFT, 40(4), 799–803.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2002 journal article
Automated cruise flap for airfoil drag reduction over a large lift range
JOURNAL OF AIRCRAFT, 39(6), 981–988.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2002 journal article
Effect of airfoil characteristics on aircraft performance
JOURNAL OF AIRCRAFT, 39(3), 427–433.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2002 article
Hybrid inverse airfoil design method for complex three-dimensional lifting surfaces
JOURNAL OF AIRCRAFT, Vol. 39, pp. 409–417.
TL;DR:
A key feature of the design method is a scheme to avoid using the panel method for sensitivity computations for the Newton iterations, which results in significant reductions in computation time and enables the integration of any readily available three-dimensional analysis code in executable form.
(via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018
2002 conference paper
The Effects of Wing Aerodynamics on Race Vehicle Performance
SAE Technical Paper Series. Presented at the Motorsports Engineering Conference & Exhibition.
Event: Motorsports Engineering Conference & Exhibition
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Crossref
Added: August 28, 2020
2001 journal article
Low-speed natural-laminar-flow airfoils: Case study in inverse airfoil design
JOURNAL OF AIRCRAFT, 38(1), 57–63.
Source: Web Of Science
Added: August 6, 2018
1998 journal article
Multipoint Inverse Method for Multielement Airfoil Design
Journal of Aircraft, 35(3), 398–404.
Source: Crossref
Added: August 28, 2020
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