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Showing 1 to 19 of 19 for “"Ammonium perchlorate"”.
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Investigation on Ammonium Perchlorate Based Electrically Controlled Propellants
… liquid polymer (polyethylene glycol) and ammonium perchlorate (AP) was conducted. Complexation of AP with PEG enabled ion transport when a voltage was applied resulting in ignition. Although the propellant was manufactures by solution casting, the final product contained no solvent as …
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Low flux radiative ignition studies of ammonium perchlorate composite propellants
The vast majority of propellant ignition data has been collected and studied for heat fluxes in the typical, intentional ignition range. However, when a propellant contained within a rocket motor case is exposed to low fluxes in hazardous situations, such as close proximity to a fire, unwanted …
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Catalytic Role of Boron Nitride in the Thermal Decomposition of Ammonium Perchlorate
The decomposition of Ammonium Perchlorate (AP), a strong oxidizer used in solid rocket propellant, is widely studied in an attempt to increase the burn characteristics of propellants. Many materials have been shown to catalyze its decomposition, but little is known about the mechanism by which AP …
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Growth and developmental effects of exposure to ammonium perchlorate during gestation, lactation, and post-lactation in deer mice
… following in utero and lactational exposure to ammonium perchlorate (AP), a thyroid toxicant. Breeding pairs were dosed continuously wUh either 0, 1 nM, 1 liM, or 1 mM concentrations of AP in drinking water, from cohabitation until pups from the third litter were weaned. Pups from the first …
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Effects of ammonium perchlorate exposure on the thyroid function and the expression of thyroid-responsive genes in Japanese quail embryos and post hatch chicks
Perchlorate ion interferes with thyroid function by competitively inhibiting the sodium-iodide symporter, thus blocking iodide uptake into the thyroid gland. In this study, the effect of perchlorate exposure on thyroid function and thyroid-responsive gene expression were examined in (1) embryos …
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The development of an optically active laser Schlieren system with application to high pressure solid propellant combustion
… and limitations of the system are discussed. Ammonium perchlorate deflagration was observed to pressures of 2500 psi. Distinct surface reaction sites were evidenced in the gas phase at high and low pressures by alternating density gradients across the surface. These sites were found to be very …
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Examination of the small scale slow cookoff behavior of a cast modified double base propellant
… was also applied to traditional double base, ammonium nitrate, and ammonium perchlorate propellants for comparison. The physical behavior of the propellant was captured using pressure diagnostics during the cookoff of confined samples in a sealed blast chamber and was compared to HMX and RDX …
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Towards Electrical Control Over Rocket Propellant Combustion
… and extinction characteristics of lithium perchlorate-based propellants. Particular attention is paid to the relative importance of electrochemistry and ohmic heating during ignition and steady-state combustion as well as the relative influence of pressure and voltage during steady …
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Solid propellant slow cookoff experiments with advanced diagnostics
… to yield mechanical displacement. Single base ammonium nitrate propellant was the first propellant composition used in developing the test apparatus. Following successful implementation and testing of the diagnostics, a series of tests were conducted to establish repeatability of all developed …
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In Situ Flame Structure Imaging of Composite Propellants using High-Speed Planar Laser-Induced Fluorescence
Ammonium perchlorate (AP) is the most commonly used oxidizer in solid rocket propellants due to its availability, high oxygen balance, and combustion characteristics. Models of AP composite propellants have been made since the 1950s and have become highly advanced in recent years. However, …
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Piezoresistivity Characterization of Polymer Bonded Energetic Nanocomposites under Cyclic Load Cases for Structural Health Monitoring Applications
… composites were experimentally investigated. Ammonium perchlorate (AP) crystals served as the inert energetic and atomized aluminum as the metallic fuel, both of which were combined to create a representative fuel-oxidizer filler often used for aerospace propulsive applications. MWCNTs were …
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Design And Implementation Of An Emission Spectroscopy Diagnostic In A High-pressure Strand Burner For The Study Of Solid Propell
… aluminum powder, acting as a fuel, mixed with ammonium perchlorate (AP), an oxidizer. The powders were held together with Hydroxyl-Terminated-Polybutadiene (HTPB), a hydrocarbon polymer that is solidified using a curative after all components are homogeneously mixed. The other two propellants …
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Composite propellant combustion with low aluminum agglomeration
… studied in a unique, wide-distribution, ammonium perchlorate/hydroxyl-terminated polybutadiene (AP/HTPB) propellant formulation that results in low Al agglomeration, even at low pressures (1-30 atm). Variations in formulation—such as fine-AP/binder ratio, Al particle size, Al loading, …
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The effects of induced hypothyroidism on the glucocorticoid stress response in Japanese quail (Coturnix japonica)
… axes of control. I used the thyroid inhibitor ammonium perchlorate (AP) for 2 weeks and 5 weeks to induce two states of decreased thyroid function: a thyroid challenged state, in which birds have depleted thyroidal T4 content, but still maintain euthyroid (normal) concentrations of plasma T4, …
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Two-Dimensional Modeling of AP/HTPB Utilizing a Vorticity Formulation and One-Dimensional Modeling of AP and ADN
… author pertaining to the propellant oxidizer, ammonium perchlorate (AP). Detailed kinetic mechanisms have been utilized to model the combustion of the monopropellants AP and ADN, and a two-dimensional diffusion flame model has been developed to examine the flame structure above an AP/HTPB …
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Integrated Design of Solid Rocket Powered Vehicles Including Exhaust Plume Radiant Emission
… operated at approximately 1 MPa to 2 MPa with ammonium perchlorate composite propellants that were doped with 0 or 8% oxamide. An end-to-end differentiable model for exhaust plume radiant emission was developed and implemented in the flexible AeroSandbox design optimization framework. The …
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Modifying burning rate and agglomeration size in aluminized composite solid propellants using mechanically activated metals
… of composite modified double base (CMDB) and ammonium perchlorate (AP) composite propellants. However, the ignition temperature is larger than the comparable mechanically activated (MA) Al-Mg powder.</p> <p>Mechanical milling was performed on magnalium powders and modifications of structure …
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Leveraging Carbon Based Nanoparticle Dispersions for Fracture Toughness Enhancement and Electro-mechanical Sensing in Multifunctional Composites
… the optimal MWCNT dispersion. In chapter seven, Ammonium Perchlorate (AP) crystals as the oxidizer, Aluminum grains as the metallic fuel, and Polydimethylsiloxane (PDMS) as the binder are used as the constituents for fabricating PBEs. To study the effect of each constituent on the MWCNT network's …