A5058395498- High-Velocity Impact and Material Behavior
- Fluid Dynamics and Heat Transfer
- Radiation Therapy and Dosimetry
- Energetic Materials and Combustion
- Particle Dynamics in Fluid Flows
- Plasma and Flow Control in Aerodynamics
- Rocket and propulsion systems research
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Structural Response to Dynamic Loads
- Laser-Plasma Interactions and Diagnostics
- Computational Fluid Dynamics and Aerodynamics
- Planetary Science and Exploration
- Nuclear Physics and Applications
- Thermal and Kinetic Analysis
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Combustion and flame dynamics
- Electromagnetic Launch and Propulsion Technology
- Polymer crystallization and properties
- Laser-induced spectroscopy and plasma
- High-pressure geophysics and materials
- Particle physics theoretical and experimental studies
- Advanced Radiotherapy Techniques
- Combustion and Detonation Processes
Texas A&M University
2021-2025
Mitchell Institute
2021-2025
Walker (United States)
2021-2024
European Organization for Nuclear Research
2008-2010
Metal fuels, such as aluminum (Al) and iron (Fe), can be added to composite solid propellants improve their performance, specific impulse, density, burning rate. In comparison aluminum, theoretically provide improved density impulse higher flame temperatures; reduce condensed combustion product (CCP) concentration the associated two-phase flow losses; eliminate hydrochloric acid (HCl) in exhaust products. A fundamental quantitative understanding of metal particle aggregation agglomeration...
Novel engineering materials and structures are increasingly designed for use in severe environments involving extreme transient variations temperature loading rates, chemically reactive flows, other conditions. The Texas A&M University Hypervelocity Impact Laboratory (HVIL) enables unique ultrahigh-rate characterization, testing, modeling capabilities by tightly integrating expertise high-rate behavior, computational polymer chemistry, multi-physics multiscale numerical algorithm...
An ultrahigh-speed spectrometer has been used to capture and analyze the transient light emission induced by hypervelocity impact (HVI) events with sub-microsecond (i.e., megahertz-rate) temporal resolution. For many projectile target material combinations, HVIs are generally known cause sudden intense flashes of light, commonly referred as “impact flash”. Stop-motion or relatively low-rate systems have employed measure HVI-induced providing some limited spectral information related dynamic...
FLUKA is a multipurpose Monte Carto code describing transport and interaction with matter of a, large variety particles over wide energy range ill complex geometries. successfully applied several fields, including, but not only particle physics, cosmic-ray dosimetry, radioprotection, hadron therapy. space radiation, accelerator design neutronics. Here we briefly review recent model developments provide examples applications to therapy, including calculation physical biological dose for...
For vehicles traveling at hypersonic speeds through the atmosphere, impact with rain droplets and particulates can be catastrophic. At these conditions, spatially temporally resolved data of particle events are scarce because experimental challenges in ground tests probing phenomena objects droplet fields. To address this need, we employed a two-stage light gas gun (2SLGG) to accelerate projectiles 2–3 km/s (~Mach 6–9) ambient conditions. A MHz-rate schlieren system was used provide images...
View Video Presentation: https://doi.org/10.2514/6.2021-0725.vid The study of hypervelocity impacts (HVIs) is increasing interest in numerous engineering applications involving micrometeoroids, orbital debris, hypersonic vehicles, and weapons systems. associated relative velocities are typically excess several kilometers per second. experimental modeling studies HVIs instrumental damage estimation designing protective armor for personnel hardware. In typical HVIs, debris clouds formed at the...
When developing protective structures to defend against hypervelocity impacts (HVIs), optimizing specific energy dissipation is critical. Incorporation of lightweight materials, such as polymers, into novel layered shielding concepts could improve HVI performance in space and military applications without compromising cost or weight. One key challenge a fundamental understanding the effects molecular architecture on macroscopic dynamic material response damage formation. In this work, two...
Implementing metal fuels, such as aluminum (Al), boron (B), and iron (Fe), into composite solid propellants can improve their performance (e.g., burning rate, specific impulse, density etc.). In the current study, AP/HTPB propellant strands loaded with micro-aluminum, iron, boron, nano-aluminum were burned in an optically accessible strand bomb over a pressure range of 500–2,175 psia (3.45–15.0 MPa). Metal loadings optimized for maximum using NASA’s Chemical Equilibrium Applications (CEA)...
As hypersonic flight vehicles become more prevalent, a robust understanding of aerodynamic and structural effects resulting from numerous weather interactions becomes increasingly important. Addressing this need involves conducting ground tests that lead to quantitative data on the behavior complex flow fields surrounding objects. In general, shock waves vehicle interact with local environment (e.g., rain droplets, dust, ice). These are inherently three-dimensional (3D), necessitating 3D...
MHz-rate schlieren imaging was employed to investigate impact characteristics and shock-droplet interactions between spherical, cylindrical, ogive shaped hypersonic projectiles traveling at 2–3 km/s speeds.