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Articles 1 - 12 of 12
Full-Text Articles in Physical Sciences and Mathematics
Development Of Boron-Containing Polyimide Materials And Poly(Arylene Ether)S For Radiation Shielding, Brittani May Collins
Development Of Boron-Containing Polyimide Materials And Poly(Arylene Ether)S For Radiation Shielding, Brittani May Collins
Dissertations, Theses, and Masters Projects
No abstract provided.
Polymeric Radiation Shielding For Applications In Space: Polyimide Synthesis And Modeling Of Multi-Layered Polymeric Shields, Clinton Cleveland Schiavone
Polymeric Radiation Shielding For Applications In Space: Polyimide Synthesis And Modeling Of Multi-Layered Polymeric Shields, Clinton Cleveland Schiavone
Dissertations, Theses, and Masters Projects
No abstract provided.
Production Of Cyclohexylene-Containing Diamines In Pursuit Of Novel Radiation Shielding Materials, Norah G. Bate
Production Of Cyclohexylene-Containing Diamines In Pursuit Of Novel Radiation Shielding Materials, Norah G. Bate
Dissertations, Theses, and Masters Projects
No abstract provided.
Advancements In Dual-Pump Broadband Cars For Supersonic Combustion Measurements, Sarah Augusta. Tedder
Advancements In Dual-Pump Broadband Cars For Supersonic Combustion Measurements, Sarah Augusta. Tedder
Dissertations, Theses, and Masters Projects
Space- and time-resolved measurements of temperature and species mole fractions of nitrogen, oxygen, and hydrogen were obtained with a dual-pump coherent anti-Stokes Raman spectroscopy (CARS) system in hydrogen-fueled supersonic combustion free jet flows. These measurements were taken to provide time-resolved fluid properties of turbulent supersonic combustion for use in the creation and verification of computational fluid dynamic (CFD) models. CFD models of turbulent supersonic combustion flow currently facilitate the design of air- breathing supersonic combustion ramjet (scramjet) engines. Measurements were made in supersonic axi-symmetric free jets of two scales. First, the measurement system was tested in a laboratory environment using …
Multifunctional Polymer Synthesis And Incorporation Of Gadolinium Compounds And Modified Tungsten Nanoparticles For Improvement Of Radiation Shielding For Use In Outer Space, Emily Grace Harbert
Multifunctional Polymer Synthesis And Incorporation Of Gadolinium Compounds And Modified Tungsten Nanoparticles For Improvement Of Radiation Shielding For Use In Outer Space, Emily Grace Harbert
Dissertations, Theses, and Masters Projects
No abstract provided.
Parallel Unstructured Grid Generation For Complex Real-World Aerodynamic Simulations, George Zagaris
Parallel Unstructured Grid Generation For Complex Real-World Aerodynamic Simulations, George Zagaris
Dissertations, Theses, and Masters Projects
No abstract provided.
Fluorescence Imaging Study Of Free And Impinging Supersonic Jets: Jet Structure And Turbulent Transition, Jennifer Ann Inman
Fluorescence Imaging Study Of Free And Impinging Supersonic Jets: Jet Structure And Turbulent Transition, Jennifer Ann Inman
Dissertations, Theses, and Masters Projects
A series of experiments into the behavior of underexpanded jet flows has been conducted at NASA Langley Research Center. This work was conducted in support of the Return to Flight effort following the loss of the Columbia. The tests involved simulating flow through a hypothetical breach in the leading edge of the Space Shuttle Orbiter along its reentry trajectory, with the goal of generating a data set with which other researchers can test and validate computational modeling tools. Two nozzles supplied with high-pressure gas were used to generate axisymmetric underexpanded jets exhausting into a low-pressure chamber. These nozzles had exit …
Discrete-Time Linear And Nonlinear Aerodynamic Impulse Responses For Efficient Cfd Analyses, Walter A. Silva
Discrete-Time Linear And Nonlinear Aerodynamic Impulse Responses For Efficient Cfd Analyses, Walter A. Silva
Dissertations, Theses, and Masters Projects
This dissertation discusses the mathematical existence and the numerical identification of linear and nonlinear aerodynamic impulse response functions. Differences between continuous-time and discrete-time system theories, which permit the identification and efficient use of these functions, will be detailed. Important input/output definitions and the concept of linear and nonlinear systems with memory will also be discussed. It will be shown that indicial (step or steady) responses (such as Wagner's function), forced harmonic responses (such as Theodorsen's function or those from doublet lattice theory), and responses to random inputs (such as gusts) can all be obtained from an aerodynamic impulse response function. …
On The Problem Of Radio Signal Attenuation During Hypervelocity Reentry, David Joseph Romeo
On The Problem Of Radio Signal Attenuation During Hypervelocity Reentry, David Joseph Romeo
Dissertations, Theses, and Masters Projects
No abstract provided.
Diurnal And Seasonal Variations Of Satellite Scintillation, John David Martin
Diurnal And Seasonal Variations Of Satellite Scintillation, John David Martin
Dissertations, Theses, and Masters Projects
No abstract provided.
Wind-Tunnel Measurements Of The Aerodynamic Damping And Oscillatory Stability In Pitch Of A Sphere At Mach Numbers From 0.20 To 4.63, Robert Ashworth Kilgore
Wind-Tunnel Measurements Of The Aerodynamic Damping And Oscillatory Stability In Pitch Of A Sphere At Mach Numbers From 0.20 To 4.63, Robert Ashworth Kilgore
Dissertations, Theses, and Masters Projects
No abstract provided.
A Theory Of Space Probe Entry Near The Low-Meteoric Velocity Limit, Frederick Cyril Grant
A Theory Of Space Probe Entry Near The Low-Meteoric Velocity Limit, Frederick Cyril Grant
Dissertations, Theses, and Masters Projects
No abstract provided.