Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 391 for “"rocket"”.
-
Hybrid Rocket Motor Scaling Process
<p>Hybrid rocket propulsion technology shows promise for the next generation of sounding rockets and small launch vehicles. This paper seeks to provide details on the process of developing hybrid propulsion systems to the academic and amateur rocket communities to assist in future research and …
-
Aerospike Rocket Motor Structural Webbing
<p>A labscale hybrid rocket motor test stand has been developed for research at Cal Poly. The primary focus of research using this rig has been the development of regenerative cooling techniques using nitrous oxide as coolant and oxidizer, as well as validation of technologies relating to the …
-
Singular optimal atmospheric rocket trajectories
… for time-range-fuel problems of an ascending rocket, using the modelling of Zlatskiy and Kiforenko. The short-term optimality of the singular subarcs has been checked in terms of certain necessary conditions: the classical Clebsch condition, the Kelley condition or the Generalized …
-
The development and implementation of a hybrid rocket motor thrust stand to investigate the relationship between combustion chamber pressure and graphite rocket nozzle erosion in hybrid rocket motors
Rocket motors frequently implement carbon-based nozzle inserts to insulate the motor from the heat produced by combustion. Over time these inserts will erode due to oxidation at the surface wherein oxidizing species found in the combustion products react with the carbon to form carbon monoxide. It …
-
Unsteady Internal Ballistics of a Hybrid Rocket
… made in the field of space tourism, hybrid rocket engines have gained a renewed interest due to their simplicity, low cost, operational flexibility, and safety. The flow in the ports of a hybrid rocket motor involves several coupled unsteady phenomena like moving walls, combustion in a …
-
Experimental investigation of microfabricated bipropellant rocket engines
… thrusters of reduced mass will be required. Microrocket engines could provide a low mass, high specific impulse, modular answer to these needs. These small rocket engines would produce thrust of order of 10's of Newtons at a thrust-to-weight of over 1000, over 10 times the thrust-to-weight of …
-
Towards Electrical Control Over Rocket Propellant Combustion
… of various propulsion systems. In solid rocket motors, active burn rate modulation has the potential to enable throttling. In spacecraft propulsion systems, electrolysis of propellants may provide a means to reduce energy requirements and eliminate the need for expensive catalysts. The …
-
Mechanisms Controlling Non-Steady Plume-Wall Interactions in Rocket Launch-Tubes (Gas, Fluid Dynamics, Rocket Systems, Base Flows, Supersonic Flows)
… effective critical flow conditions within rocket launch tubes due to friction and/or cross-sectional obstruction are studied here in detail. The analytical treatment by the flow component approach using one- and two-dimensional techniques is corroborated by a comprehensive experimental …
-
MODIFICATION OF COMMERCIAL ROCKET MOTORS FOR TACTICAL APPLICATIONS
… modifications to commercial off-the-shelf solid rocket motors have been evaluated in support of the Naval Postgraduate School tactical rapid-response payload delivery vehicle. The modifications include a novel head-end ignition system and a tailorable nozzle end cap designed to provide reliable …
-
Contaminated Sweeping Langmuir Probes on Sounding Rocket Platforms
… one of the most commonly used probes on sounding rocket missions. They offer measurements of plasma density, electron temperature, and both relative and absolute payload charging. One of the major implementation challenges, however, is contamination on the surface of the probe such that collected …
-
Optimal Sizing and Control of Hybrid Rocket Vehicles
… a genetic algorithm is used to optimize a hybrid rocket engine in order to minimize the propellant required for a specific mission. In a hybrid rocket engine, the mass flow rate of the oxidizer can be throttled to enhance the performance of the rocket. First, an analysis of the internal ballistics …
-
Rocket states - an analysis of US missile culture
This thesis emerges out of a study of Thomas Pynchon’s work, from certain qualities and attributes that recur in his writing, notably the forces and hauntings of technology; the project is, further, alert to these phenomena as it is to Pynchon’s prose technique which exemplifies these aspects in …
-
Gyro-Interaction Rocket Experiments in the Lower Ionosphere
Made available in DSpace on 2014-12-08T22:23:34Z (GMT). No. of bitstreams: 1 6500835.pdf: 3150213 bytes, checksum: a58080881421c40acf54943ae23b48dd (MD5) Previous issue date: 1964
-
Design development of a vertically landed model rocket
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
-
Design of a silicon microfabricated rocket engine turbopump
… of a silicon demonstration turbopump for a micro-rocket engine, and the analysis and experimental investigation of liquid bearings that may be implemented in a future turbopump. Liquid micro-scale lubrication is investigated. Models are developed to predict the performance of hydrostatic liquid …
-
The design of a small interceptor rocket system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1961.
-
Effect of chemical structure on rocket fuel impulse
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1951.
-
Investigation of suction recirculation in rocket pump inducers
Rocket pump inducers are studied with a Navier-Stokes solver, the Moore Elliptic Flow Program, MEFP. Two redesigns of the Rocketdyne ADP inducer are performed. The first redesign changes the hub-tip ratio from 0.3 to 0.4. The second redesign influences the leading edge tip region. This part of the …
Page 1 of 20