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Showing 1 to 20 of 21 for “"solid rocket motor"”.
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Design Optimization Of Solid Rocket Motor Grains For Internal Ballistic Performance
… of optimization tools to the design of solid rocket motor grains per internal ballistic requirements. Research concentrated on the development of an optimization strategy capable of efficiently and consistently optimizing virtually an unlimited range of radial burning solid rocket motor …
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Direct Numerical Simulation of Turbulence in a Model Solid Rocket Motor
The direct numerical simulation database is also used to make a priori estimates of the relative magnitudes of subgrid terms in the filtered evolution equations. It is found that in the equations for mean momentum and resolved scale Reynolds stress, the dominant subgrid terms are the subgrid stress …
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Characterization of Shear Strengths and Microstructures for Solid Rocket Motor Insulation Materials
As advances in solid rocket technology push rocket motors to more extreme operating speeds and temperatures, it becomes increasingly important to have well-designed material systems capable of surviving these harsh conditions. One common component in these systems is the use of a fiber- and …
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A parametric study on the contained burning of solid rocket motor propellant
Outmoded solid rocket motor propellant is being destroyed by burning as part of the worldwide demilitarization process. Many of these bums have been performed in spaces where the combustion products are contained within a sealed chamber. There is currently no accepted method to predict the gas …
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Combustion of Single and Agglomerated Aluminum Particles in Solid Rocket Motor Flows
Lastly, a model was developed to describe the oxide cap accumulation on the droplet surface from the oxide smoke cloud surrounding the droplet. Results suggest that less oxide accumulates in high-pressure SRMs when considering mass burning rates for different relative cap sizes. The thermophoretic …
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Manufacturing methods for a solid rocket motor propelling a small, fast flight vehicle
… configured around a long-endurance, end-burning solid rocket motor that provides 2-3 minutes of powered flight. Challenges exist for manufacturing solid rocket motors for small, fast aircraft such as Firefly. Achieving desired motor performance requires a void-free propellant grain and thermal …
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Flow study of the nozzle region of the space shuttle solid rocket motor
… to analyze flow characteristics inside the solid rocket motor (SRM) used on the NASA space shuttle. The objective of this investigation was to determine whether the internal flow structure could adversely affect the nozzle/case joint and the surrounding casing. Also, it was hoped to learn …
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Internal flow investigation of an aft finocyl grain configuration in a solid rocket motor
… flow field about the nozzle region of a proposed solid rocket motor (SRM) configuration that would potentially replace the current external boosters on NASA's Space Shuttle. One-eighth-scale clear acrylic models of the proposed submerged aft-dome and aft finned grain elements were constructed to …
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Flow field investigation in pulse 1 motor of a two-pulse solid rocket motor
… investigation of the flow field in the pulse I motor of a two-pulse solid rocket motor. A full scale model of clear acrylic material was constructed to allow direct visual access of the flow field. The experiment, which was conducted with one of the VPI water analogy rigs, simulated the flow in …
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Modeling, and classical and advanced control of a solid rocket motor thrust vector control system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Reduction Of Vortex-driven Oscillations In A Solid Rocket Motor Cold Flow Simulation Through Active Control
… airplane engine, controlled and powered by a DC motor. The use of open-loop only active control was not highly effective in reducing the amplitude of the first longitudinal acoustic mode, near 93 Hz, when the secondary injection was pulsed at the same modal frequency. This was due to the …
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Integrated Design of Solid Rocket Powered Vehicles Including Exhaust Plume Radiant Emission
For aircraft and rockets where vehicle visibility is a concern, exhaust plume radiant emission is an important aspect of solid rocket powered vehicle performance. However, it is often not considered during the design phase, despite significant couplings with other vehicle disciplines, especially …
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Vehicle performance optimization utilizing the Air Turbo-Ramjet propulsion system; Methodology development and applications
<p>"The ATR (Air TurboRocket) is an air breathing propulsion system in which the turbocompressor turbine is powered by a hot drive gas which is generated independently of the air flow through the compressor. The ATR has a lower specific impulse (Isp) and higher thrust compared to a similar size …
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Estimation of evaporation of previously condensed hydrocarbons in a tunnel burn experiment
… the worldwide demilitarization efforts, outmoded solid rocket motor propellant is being destroyed by burning. Often this is done on a repeated basis in a closed chamber. There is concern whether or not previously condensed materials on the chamber wall might be re-evaporated during a new burn; The …
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Implementation of Microwave Transmissions for Rocket Exhaust Plume Diagnostics
<p>Rocket-launched vehicles produce a trail of exhaust that contains ions, free electrons, and soot. The exhaust plume increases the effective conductor length of the rocket. A conductor in the presence of an electric field (e.g. near the electric charge stored within a cloud) can channel an …
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Development and modeling of a dual-frequency microwave burn rate measurement system for solid rocket propellant
… microwave bum rate measurement system for solid rocket motors has been developed and is described. The system operates in the X-band (8.2-12.4 Ghz) and uses two independent frequencies operating simultaneously to measure the instantaneous bum rate in a solid rocket motor. Modeling of the …
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Development, modeling and testing of a slow-burning solid rocket propulsion system
… do not meet. To meet this need, a slow-burning solid rocket motor has been developed. Such motors require slow-burning solid propellants with tailorable burn rate. This thesis reports experimental results and combustion theory for a slow-burning solid propellant. It also describes a rocket motor …
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Development, modeling and testing of thermal protection systems in small, slow-burning solid rocket motors
… such a regime requires the use of a slow-burning solid rocket motor. To achieve long burn times, an end-burning grain configuration is required in addition to a burn rate suppressant. Such a propulsion system presents unique thermal challenges due to the long exposure times and the close proximity …
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Effect of propellant morphology on the acoustics of the BATES motor
… (Ballistic Test and Evaluation System) 15 pound motor. The injection boundary conditions for the motor are defined by the velocity-temperature temporal correlations. Three different propellant morphologies are modeled and tested along with a random white noise model that represents the current …
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