Aerospace Engineering Scholarly Works: Recent submissions
Now showing items 1-20 of 49
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Proper orthogonal decomposition and recurrence map for the identification of spatial–temporal patterns in a low-Re wake downstream of two cylinders
(American Institute of Physics, 2020-03-20)Flow decomposition methods provide systematic ways to extract the flow modes, which can be regarded as the spatial distribution of a coherent structure. They have been successfully used in the study of wake, boundary layer, ... -
Robust numerical analysis of fibrous composites from X-ray computed tomography image data enabling low resolutions
(Elsevier, 2022-06-16)X-ray computed tomography scans can provide detailed information about the state of the material after manufacture and in service. X-ray computed tomography aided engineering (XAE) was recently introduced as an automated ... -
A semi-analytical solution and AI-based reconstruction algorithms for magnetic particle tracking
(Public Library of Science, 2021-07-09)Magnetic particle tracking is a recently developed technology that can measure the translation and rotation of a particle in an opaque environment like a turbidity flow and fluidized-bed flow. The trajectory reconstruction ... -
Measuring vorticity vector from the spinning of micro-sized mirror-encapsulated spherical particles in the flow
(American Institute of Physics, 2019-11-13)We demonstrate a nonintrusive technique that is capable of measuring all three-components of vorticity following small tracer particles in the flow. The vorticity is measured by resolving the instantaneous spin of the ... -
A new development in magnetic particle tracking technology and its application in a sheared dense granular flow
(American Institute of Physics, 2019-06-26)This paper presents a new development in the magnetic particle tracking (MPT) technology that measures the translational and rotational motions of a small particle. A main advantage of MPT is that it is able to track objects ... -
Sensor driven preliminary wing-ground plane sizing approach and applications
(Hindawi, 2018-07-02)Structurally integrated antenna arrays provide synergies allowing the integration of large apertures onto airborne platforms. However, the surrounding airframe can greatly impact the performance of the antenna array. This ... -
Time-domain simulation of ultrasound propagation with fractional Laplacians for lossy-medium biological tissues with complicated geometries
(Acoustical Society of America, 2019-01-03)Simulations of ultrasound wave propagation inside biological tissues have a wide range of practical applications. In previous studies, wave propagation equations in lossy biological media are solved either with convolutions, ... -
Relations of POD modes and Lyapunov exponents to the nonlinear dynamic states in flow over oscillating tandem cylinders
(AIP Publishing, 2018-12-21)Nonlinear dynamic states of flow field are analyzed using the Proper Orthogonal Decomposition (POD) to extract spatial coherent structures, and the temporal development of these spatial structures is further investigated ... -
HF/VHF Radar Sounding of Ice from Manned and Unmanned Airborne Platforms
(MDPI, 2018-05-16)Ice thickness and bed topography of fast-flowing outlet glaciers are large sources of uncertainty for the current ice sheet models used to predict future contributions to sea-level rise. Due to a lack of coverage and ... -
The effect of variations in first- and second-order derivatives on airfoil aerodynamic performance
(Taylor & Francis, 2016-12-04)The geometric factors which influence airfoil aerodynamic performance are attributed to variations in local first- and second-order curvature derivatives. Based on a self-developed computational fluid dynamics (CFD) program ... -
Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica
(European Geosciences Union, 2017)We present a compilation of radio-echo sounding (RES) measurements of five radar systems (AWI, BAS, CReSIS, INGV and UTIG) around the EPICA Dome C (EDC) drill site, East Antarctica. The aim of our study is to investigate ... -
Rectangular jet with shear layer swirl: Rotation & mixing enhancement
(Multi-Science Publishing, 2016-04-07)A rectangular jet emerging from a nozzle with embedded swirl vanes in its exit boundary layer is studied. The swirling shear layer imposes an external torque on the jet boundary where it causes jet rotation in the direction ... -
Self-Invention in the Realm of Production: Craft, Beauty, and Community in the American Counterculture, 1964–1978
(University of California Press, 2016-08)In the 1960s and 1970s, self-avowed members of the counterculture, often based on the west coast and in the Rocky Mountain West, eschewed critics’ stereotypical notions of stoned and indolent hippies and struggled to build ... -
Autonomous Close Formation Flight Control with Fixed Wing and Quadrotor Test Beds
(Hindawi Publishing Corporation, 2016-05-11)Autonomous formation flight is a key approach for reducing energy cost and managing traffic in future high density airspace. The use of Unmanned Aerial Vehicles (UAVs) has allowed low-budget and low-risk validation of ... -
Thermally adaptive building covering field test
(Elsevier, 2016)This paper represents the first public exhibition of Thermadapt™ building coverings which were invented more than eight years ago. The paper starts with a brief overview of the field of adaptive materials and their ... -
Localized Artificial Viscosity Stabilization of Discontinuous Galerkin Methods for Nonhydrostatic Mesoscale Atmospheric Modeling
(http://journals.ametsoc.org/doi/10.1175/MWR-D-15-0134.1, 2015-11-24)Gibbs oscillation can show up near flow regions with strong temperature gradients in the numerical simulation of nonhydrostatic mesoscale atmospheric flows when using the high-order discontinuous Galerkin (DG) method. The ... -
Research on energy extraction characteristics of an adaptive deformation oscillating-wing
(Journal of Renewable and Sustainable Energy, 2015-03-02)Oscillating foil machines represent a type of flow energy harvesters which perform pitching and plunging motions simultaneously to harness the energy from incoming stream. In this paper, a new adaptive deformation oscillating ... -
Simulation of sound propagation over porous barriers of arbitrary shapes
(Acoustical Society of America, 2014-11-25)A time-domain solver using an immersed boundary method is investigated for simulating sound propagation over porous and rigid barriers of arbitrary shapes. In this study, acoustic propagation in the air from an impulse ... -
Unmanned Aerial Vehicle Navigation Using Wide-Field Optical Flow and Intertial Sensors
(Hindawi Publishing Corporation, 2015-01)This paper offers a set of novel navigation techniques that rely on the use of inertial sensors and wide-field optical flow information. The aircraft ground velocity and attitude states are estimated with an Unscented ... -
Design, Manufacturing and Test of a High Lift Secondary Flight Control Surface with Shape Memory Alloy Post-Buckled Precompressed Actuators
(MDPI, 2015-07-28)The use of morphing components on aerospace structures can greatly increase the versatility of an aircraft. This paper presents the design, manufacturing and testing of a new kind of adaptive airfoil with actuation through ...