Browsing AE Research Publications by Title
Now showing items 114-133 of 182
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Neural network based adaptive controller for attitude control of all-electric satellites
(Univelt Inc., 2015)This paper considers the attitude control problem for an all-electric spacecraft during its transfer to the Geostationary Earth orbit. During the transfer, the spacecraft's solar arrays need to point towards the Sun, except ... -
A novel methodology for fast and robust computation of low-thrust orbit-raising trajectories
(Univelt, Inc., 2017)All-electric spacecraft makes numerous revolutions during the orbit-raising to the geosynchronous equatorial orbit. This paper presents a new mathematical formulation to describe the dynamics of the spacecraft under the ... -
Numerical Analysis of Effects of Leading-Edge Protuberances on Aircraft Wing Performance
(American Institute of Aeronautics and Astronautics, 2012-09)The effects of biologically inspired leading-edge protuberances on aircraft wings were investigated by using a numerical scheme. Simulations were performed at a Reynolds number of 5.7 x 10(5) on wings with leading-edge ... -
Numerical assessment of pulsatile flow through diverging tees with a sharp- and round-edge junction
(Elsevier, 2019-04)Unsteady flow through diverging tees is of interest in many industrial systems and physiological applications. In this study, the characteristics of the transient flow behaviors at the junctions of diverging tees with ... -
A numerical investigation of the onset of flow separation in round-edge diverging tees
(ASME, 2018-03)The onset condition of flow separation in diverging tee junctions was investigated numerically. Flow separation and recirculation at the proximal region of a bypass graft can contribute to early phase graft failure in ... -
Numerical simulation and experimental comparison of the R12, R22 and R134a flow inside straight and coiled helical capillary tubes
(© Springer International Publishing AG, Part of Springer Science+Business Media, 2016-03)This paper presents a numerical simulation for adiabatic condition of the R12, R22 and R134a flow through straight and helically capillary tubes and also an experimental investigation of the R134a flow inside straight and ... -
Numerical simulation of wall-pressure fluctuations due to a turbulent boundary layer
(AMER INST AERONAUT ASTRONAUT, 2012)In this investigation, wall-pressure fluctuations due to a turbulent boundary layer are estimated by various numerical methods. Four different turbulence models, including one- and two-equation models and a recently developed ... -
Numerical simulations of pulsatile flow in an end-to-side anastomosis model
(Tech Science Press, 2007-03)A potential interaction between the local hemodynamics and the artery wall response has been suggested for vascular graft failure by intimal hyperplasia (IH). Among the various hemodynamic factors, wall shear stress has ... -
Numerical-based comparison among critical flow properties of HFC-134a and its new alternatives HFO-1234yf and HFO-1234ze through short-tube orifices
(American Society of Mechanical Engineers, 2015)Although HFC-134a is a common refrigerant for residential and mobile refrigeration systems, investigators are dealing with replacing it with new alternatives because of its harmful environmental and global warming effects. ... -
Numerical-based non-dimensional analysis of critical flow of R-12, R-22, and R-134a through horizontal capillary tubes
(Elsevier B.V., 2015-10)Development of correlations predicting critical mass flow rate and critical pressure distribution through capillary tubes is presented. In order to accomplish such a work, the critical mass flow rate and pressure distribution ... -
Objective function weight selection for sequential low-thrust orbit-raising optimization problem
(Univelt Inc., 2019-01)In this paper, we consider the low-thrust orbit-raising problem formulated as a sequence of optimal control sub-problems. This formulation is helpful in rapid and robust generation of geocentric electric orbit-raising ... -
Operational assessment of heavy air tankers
(American Institute of Aeronautics and Astronautics, 2014-01)Flight data collected by various P2V and P3A air tankers in actual operation over several seasons have been used to construct statistical information on aircraft usage and maneuver load spectra in this role. The data used ... -
Optimal aircraft trajectories for wind energy extraction
(American Institute of Aeronautics and Astronautics, Inc., 2018-02)It is well known that birds and air vehicles are capable of extracting energy from atmospheric winds. Land birds such as condors and vultures remain aloft for hours at a time without flapping their wings. In straight and ... -
Optimal and decentralized controller designs for an elastically shaped aircraft
(American Institute for Aeronautics and Astronautics, Inc., 2014-01-17)In this paper, control design of an elastically shaped aircraft with highly flexible wings is discussed. The aircraft has the capability to actively change the wing twist and bending in flight so as to achieve a local angle ... -
Optimal scheduling of multispacecraft refueling based on cooperative maneuver
(Elsevier B.V., 2015-06-15)The scheduling of multispacecraft refueling based on cooperative maneuver in a circular orbit is studied in this paper. In the proposed scheme, both of the single service vehicle (SSV) and the target satellite (TS) perform ... -
An overview of Cube-Satellite propulsion technologies and trends
(MDPI Multidisciplinary Digital Publishing Institute, 2017-12-09)CubeSats provide a cost effective means to perform scientific and technological studies in space. Due to their affordability, CubeSat technologies have been diversely studied and developed by educational institutions, ... -
Overview of data-driven hazard detection research at WSU's disaster resilience analytics center for enhancing community resilience
(CEUR-WS, 2022-07-06)Early detection of hazards as well as the identification of geographical regions affected by a disaster play a substantial role in timely intervention and planning of disaster relief operations. We provide an overview of ... -
Parallel implementation for a mhd solver with equilibrium chemistry
(American Institute of Aeronautics and Astronautics Inc, 2020-06-08)A parallel implementation for a hypersonic MHD solver was developed. The original serial code utilizes a 4th-order modified Runge-Kutta scheme with TVD to solve the MHD equations for hypersonic flow regimes. To extend the ... -
Parametric exploration of wing-body junction flow using computational fluid dynamics
(American Institute of Aeronautics and Astronautics, 2015-09)The wing-body junction flow is investigated parametrically using computational fluid dynamics in an attempt to understand the effects of junction flow on aircraft drag, with a focus on application to large business jet or ... -
PDE-based analysis of automotive cyber-attacks on highways
(IEEE, 2017-05)This paper considers scenarios wherein a group of malicious vehicles on a highway perform a cooperative attack with the motive of creating undesirable wave effects among other vehicles on the highway. The two species of ...