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Showing 1 to 20 of 35 for “"Solid propellant"”.
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Solid propellant slow cookoff experiments with advanced diagnostics
Slow cookoff of solid propellant was experimentally studied at the University of Illinois by examining the behavior throughout the cookoff process. The general concept involved preparing axial-symmetric samples of chosen compositions and casting them into carbon fiber cases. The cured samples were …
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Thermal stresses in a finite solid-propellant grain
… to gain a fundamental understanding of actual solid propellant thermal stress problems, the geometry of the solid propellant baa been idealized as a short, circular cylinder with flat ends. It is felt that the consideration of actual curved ends would only unduly have complicated the analysis. …
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Characterization of a green electric solid propellant for electric propulsion
<p>"Electric solid propellants are advanced solid chemical rocket propellants that can be controlled (ignited, throttled and extinguished) through the application and removal of an electric current. These propellants are also being considered for use in ablative pulsed plasma thruster and multimode …
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Investigating Energetic Porous Silicon as a Solid Propellant Micro-Thruster
… and showed energetic porous silicon as a viable solid propellant for propulsion of nano-satellites and micro-robots.
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Radiative heat transfer from aluminum oxide in solid propellant flames
The radiative heat transfer in aluminized propellant flames was determined. Liquid aluminum oxide (Al$\sb2$O$\sb3$) particles, produced from the distributed combustion of aluminum droplets, dominated the optical characteristics of aluminized propellant flames. A laser scattering and extinction …
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A system for the control of burning of a solid propellant
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1962.
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Microwave data reduction technique for calculation of solid propellant burning rates
… continuous burning-rate information from a solid propellant slab-burning rocket motor is described. A previous derivative-based method for reducing the microwave data is reviewed and an improved data reduction technique is introduced. The improved microwave modeling technique is analyzed …
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Implementation of ImageActionplus software for improved image analysis of solid propellant combustion holograms.
This thesis supports computer-aided data analysis of holograms produced from rocket motor firings. The work reported in this thesis modified existing software code to make it compatible with installed upgrades in the microcomputer imaging system. In particular, this involved converting the format …
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Instability of Oscillatory Flow in Ducts and Applications to Solid -Propellant Rocket Aeroacoustics
… of high-amplitude acoustic instability in solid propellant rockets, wherein finite amplitude acoustic motions can produce near-surface turbulence and lead to an enhanced propellant burning rate that couples with the chamber acoustics. Prediction of the threshold acoustic amplitude of …
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Micromechanics Approach to the Study of Constitutive Response and Fracture of Solid Propellant Materials
… the material, the micromechanics of dewetting in solid propellant materials is analyzed at a unit cell containing a single particle imbedded in a linearly viscoelastic matrix. For weakly bonded particle/matrix interfaces, the energetics of dewetting are established and solutions for the dewetting …
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Effects of a Slow Gas-Phase Reaction on the L(*) Instability in Solid-Propellant Rockets
… between the thermal relaxation in the solid propellant and the bulk-mode gas motion inside the combustion chamber is examined theoretically and numerically. The explosion reaction, following the quasisteady fizz reaction occurring near the burning surface, is analyzed for its …
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A Method of Conformal Mapping and the Determination of Stresses in Solid-Propellant Rocket Grains
Made available in DSpace on 2014-12-04T23:11:08Z (GMT). No. of bitstreams: 1 6305160.pdf: 4196593 bytes, checksum: 6907abf19013d776f57d219be8689bba (MD5) Previous issue date: 1963
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Investigation of the Stability of Metallic/Composited-Cased Solid Propellant Rocket Motors under External Pressure
Solid rocket motors consist of a thin metallic or composite shell filled with a soft rubbery propellant. Such motors are vulnerable and prone to buckling due to sudden external pressures produced by nearby detonation. The stability conditions of rocket motors subjected toaxisymmetric, external …
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An experimental study of solid propellant deflagration using high speed motion pictures and postfire residue analysis
Six aluminized propellants were investigated through strand burning in a windowed combustion bomb at 500 psi and 1000 psi. Postfire particle residues were analyzed with a scanning electron microscope and found to have bi-modal size distributions. The mean diameter of the fine particle distribution …
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The development of an optically active laser Schlieren system with application to high pressure solid propellant combustion
… edge, was developed and applied to high pressure solid propellant combustion studies. Advantages 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 …
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An experimental investigation of the effects of acceleration on the combustion characteristics of an aluminized composite solid propellant
The performance characteristics of many solid propellant rocket motors have been drastically affected by the acceleration loads imposed during flight. The two modes of acceleration are spin-induced accelerations due to spin stabilization and longitudinal accelerations due to motor thrusting. The …
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A feasibility study of the use of microwaves to measure radical and differential burning rates in solid propellant rockets
… burning rates ,and differential burning rates in solid propellant rocket motors. A simulator, consisting of a spiral rotating in an oil bath, was used to represent the curved burning surface of a tubular grain of propellant with the outer surface and ends restricted. The radial movement of the …
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Determination of the complex modulus of a solid propellant and random vibration analysis of the layered viscoelastic cylinders with finite element method
… laboratory random vibration testing of sampled solid rocket motors on electromagnetic or hydraulic shakers are routinely performed as an important experiment-oriented quality control strategy. Nevertheless, it is crucial to understand the dynamic structural behavior of these layered viscoelastic …
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Comparison of Cation-Anion Oxidizer Pairings in Electrically Controllable Solid Propellants
Electrically controllable solid propellants are an area of interest as a viable solution to the lack of throttle-ability in solid propellant rocket motors. Existing studies have focused on propellants compositions using hydroxyl-ammonium nitrate, ammonium nitrate, or lithium perchlorate as …
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