A5029396096- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Aerodynamics and Fluid Dynamics Research
- Gas Dynamics and Kinetic Theory
- Wind and Air Flow Studies
- Atmospheric Ozone and Climate
- Advanced Aircraft Design and Technologies
- Ionosphere and magnetosphere dynamics
- Aerodynamics and Acoustics in Jet Flows
- Turbomachinery Performance and Optimization
- Aerospace Engineering and Control Systems
- Vehicle emissions and performance
- Atomic and Subatomic Physics Research
- Fluid Dynamics and Vibration Analysis
- Combustion and flame dynamics
- Model Reduction and Neural Networks
- Advanced Multi-Objective Optimization Algorithms
- Aerospace and Aviation Technology
- Solar and Space Plasma Dynamics
- Meteorological Phenomena and Simulations
- Fluid dynamics and aerodynamics studies
- Methane Hydrates and Related Phenomena
University of Maryland, College Park
2020-2024
University of Glasgow
2016-2018
Aerodynamic optimisation has become an indispensable component for any aerodynamic design over the past 60 years, with applications to aircraft, cars, trains, bridges, wind turbines, internal pipe flows, and cavities, among others, is thus relevant in many facets of technology. With advancements computational power, automated procedures have more competent, however, there ambiguity bias throughout literature regards relative performance architectures employed algorithms. This paper provides...
Wingtip vortices are an important phenomenon in fluid dynamics due to their complex and negative impacts. Despite numerous studies, the current understanding of inner vortex is very limited; thus, a basis for design effective wingtip geometry manipulation narrow. This work examines structure trailing shed from swept-tapered wing, analogous commercial aircraft topology. Stereoscopic particle imaging velocimetry has been utilized compare development through several angles attack at various...
View Video Presentation: https://doi.org/10.2514/6.2022-0734.vid In this paper, a Q-FLDI system was constructed to correlate disturbances inside and outside of the boundary layer over blunted cone in high-enthalpy, hypersonic flow at T5, free- piston-driven reflected-shock tunnel California Institute Technology. We present results for three shots representing fully-turbulent case with 5 mm nose-tip radius, an unstable radius moderate enthalpy (6 MJ/kg), 2 higher (10.5 MJ/kg). case, spectra...
<div class="section abstract"><div class="htmlview paragraph">The Ford Motor Company Rolling Road Wind Tunnel (RRWT) is a state-of-the-art aerodynamic wind tunnel test facility in Allen Park, Michigan. The RRWT has operated since January 2022 and designed for passenger motorsport vehicle development. includes an office area, three secure customer preparation bays, garage frontal area measurement system, full-scale ¾ open jet tunnel. features interchangeable single belt 5-belt...
Low-speed wind tunnel tests of a flexible wing semi-span model have been implemented in the $$9\times 7$$ ft de Havilland at University Glasgow. The main objective this investigation is to quantify effect removing traditional peniche boundary layer spacer utilised type testing. Removal results stand-off gap between wall and model’s symmetry plane. This offers advantage preventing development horseshoe vortex front model, peniche/wall juncture. formation known influence flow structures around...
<div class="section abstract"><div class="htmlview paragraph">Common aerodynamic research models have been used in throughout the years to assist with development and correlation of new testing numerical techniques, addition being excellent tools for gathering fundamental knowledge about physics around vehicle. The generic truck utility (GTU) was introduced by Woodiga et al. [<span class="xref">1</span>] 2020 following successful adoption DrivAer (Heft...
A novel population structured genetic algorithm (sGA) with embedded potential flow vortex ring panel method (VRM) has been developed to minimise induced and parasitic drag subject constraints on lift, root bending moment, longitudinal static stability.The optimisation architecture can activate up four independent wing segments allowing 28 design variables.Minimum of tip extensions winglet configurations are compared using the non-linear stochastic method.The optimiser identified joined box...
This paper presents an experimental study of the effect wall cooling on boundary-layer structures a sharp-nosed, 5° half-angle cone in Mach 6 flow. An methodology was developed that allowed quantitative measurements second-mode disturbance growth over range wall-temperature ratios from [Formula: see text] without modifying freestream environment. The system comprised probe cooling, liquid nitrogen injection, and thermal insulation. model temperature monitored before each run, with...
View Video Presentation: https://doi.org/10.2514/6.2021-2866.vid The effect of wall cooling is investigated on the boundary layer a 5◦ -half-angle cone in Mach-6 flow. combination active and passive thermal management decreases model temperature Tw by up to 85◦ C. Schlieren imagery used compare cooled uncooled cases, with wall-to-edge ratios 1.67 ≤ /Te 2.35 at Re∞ = 5.3 × 10^6 m−1 . structure, spectral content, growth second-mode wavepackets identified these levels are compared one another....
View Video Presentation: https://doi.org/10.2514/6.2022-1709.vid This paper presents an extended study of the effect cooling on boundary-layer structures and thermal topology a slender cone in Mach-6 flow. A range wall-to-edge temperature ratios 1.64-2.34 was established with active passive management. These conditions were tested at freestream unit Reynolds number Re = 5.2 x 10^6 /m angles attack 0d 4d. In all cases, schlieren imagery utilized to evaluate instabilities within boundary...
High frequency and resolution turbulent velocity, temperature, acoustic fluctuations have been measured using the University of Maryland's stratospheric turbulence observation platform, FiSH (Fluctuations in Stratosphere Hot-wire). The objective is to establish capability for characterizing/profiling turbulence. Such data represents a fundamental gap knowledge which necessary aid prediction boundary-layer transition hypersonic vehicles. equipped with hot-/cold-wire probes unsteady velocity...
This study presents the experimental techniques and analysis utilized to characterize boundary-layer instability mechanisms on a slender cone under cooled-wall conditions. Simulations indicated that, with cooler probe inserted, model would reach thermal equilibrium at -56C. A final configuration, utilizing passive anti-icing management, achieved temperatures as low -58C in region of interest. As high-degree cooling precluded use conventional surface-mounted high-frequency instrumentation,...
A campaign of hypervelocity experiments was conducted with a blunted 5d-half-angle cone in the T5 shock tunnel. modified Z-type schlieren setup utilized to image boundary-layer total enthalpies around 10 MJ/kg and freestream-to-wall temperature ratios approximately 5. Second-mode instabilities transitional behavior boundary layer were identified imaged within field view between x/L = 0.57 0.73. wavepackets manifested as alternating dark/light waves beginning right at wall permeating up 30%...
View Video Presentation: https://doi.org/10.2514/6.2023-3544.vid A modified version of the custom payload FiSH (Fluctuations in Stratosphere using Hot-wire) for high-altitude turbulent fluctuation measurements has been successfully flown multiple times with meteorological balloons 2022 to investigate enhanced turbulence due breaking gravity waves. The utilizes hot-wire, cold-wire, and microphones characterize high frequency resolution velocity, temperature, acoustic pressure fluctuations...
Cosmogenic beryllium-10 and beryllium-7, the ratio of two (10Be/7Be), are powerful atmospheric tracers stratosphere–troposphere exchange (STE) processes; however, measurements sparse for altitudes well above tropopause. We present a novel high-altitude balloon campaign aimed to measure these isotopes in mid-stratosphere called Beryllium Isotopes Resolving Dynamics Stratosphere (BIRDIES). BIRDIES targeted gravity waves produced by tropopause-overshooting convection study their propagation...