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.
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Showing 1 to 20 of 26 for “"scaling effects"”.
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Numerical Investigation of Scaling Effects of a Ramjet-Powered Projectile
<p>Ramjet flowpath miniaturization is a potentially useful technology for integration into munitions to increase range, accuracy, and lethality. The emphasis of this effort is to numerically characterize the performance of a miniature hydrogen-fueled and ethylene-fueled ramjet flowpath during Mach …
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Scaling Effects on the Hydrodynamics and Performance of Current Turbines
… and make it challenging to isolate the effects of individual parameters on turbine performance. Furthermore, the influence of certain parameters on turbine hydrodynamics and performance is not fully understood. Therefore, the aim of this work is to investigate the effects of certain …
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Control Driven Scaling Effects of Motor and Rotors for Urban Air Mobility Design
… controllability and propulsion associated with scaling-up consumer drones to vehicles that may carry significantly larger payloads, including passenger will be analyzed and tested. Controllability is mainly compromised due to the increasing response time of a larger rpm controlled rotor. This …
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Numerical study on scaling effects and decoupled network-based simulation of gaseous explosion
<p>"This research seeks to improve the prediction efficiency of gaseous explosions realized by numerical simulations in a full-scale underground network using a decoupled method. To provide quick predictions of overpressure distribution of methane explosions in underground airway networks, a …
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Scaling effects in the static and dynamic response of graphite- epoxy beam-columns
… is to characterize these limitations, or scaling effects, in the large deflection response and failure of composite beams. Scale model beams were loaded with an eccentric axial compressive load designed to produce large bending deflections and global failure.
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Investigation of Scaling Effects for a Synthetic Jet Actuator Using High and Low Fidelity Analyses
<p>This research presents an investigation on the scaling effects for synthetic jet actuators using Ansys-CFX and a Lumped Element Model (LEM). Synthetic jets or zero net mass-flux devices use a vibrating diaphragm to generate an oscillatory flow through a small orifice. A synthetic jet actuator …
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Fabrication of silicon-based nano-structures and their scaling effects on mechanical and electrical properties
… behavior of SiNLs depended on the combined effects of load, line geometry, and the friction at contact. This study demonstrated a valuable approach to fabrication of well-defined Si nanoline structures and the application of the nanoindentation method for investigation of their mechanical …
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Scaling Effects on Damage Development, Strength, and Stress-Rupture Life on Laminated Composites in Tension
The damage development and strength of ply-level scaled carbon/epoxy composite laminates having stacking sequence of [+Tn/-Tn/902n]s where constraint ply angle, T, was 0, 15, 30, 45, 60, and 75 degrees, and size was scaled as n=1,2,3, and 4, is reported in Part I. X-radiography was used to monitor …
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Algorithms for three-dimensional free-form object matching
… correspondence or initial transformation and no scaling effects, namely the KH and the umbilic method. The KH method establishes a correspondence between two objects by utilizing the Gaussian and mean curvatures. The umbilic method uses the qualitative properties of umbilical points to find …
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The effect of specimen size on the mechanical response of laminated composite coupons loaded in tension and flexure
… where n = 1, 2, 4. Ply- and sublaminate-level scaling were used to increase specimen thickness. All flexure specimens were of AS4/3502 graphite/epoxy. Enhanced X-ray radiography and edge photomicroscopy were used to examine damage development in specimens loaded to various fractions of their …
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Experimental and numerical study of primary consolidation of soft clay
… is subjected to different strain rates, 2) the effects of hydraulic gradient on consolidation behavior, and 3) the scaling effects based on ... from oedometer tests with varying drainage heights. This research is separated into two main parts including the experimental program and the numerical …
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Flow of [phi] mesons in pPb collisions at the LHC with the CMS detector
… to study the mass ordering and quark number scaling effects in measurements of elliptic flow.
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Progressive Failure Analysis of Double-Notched Composite Laminates
… results. Finally, the notch-size and ply-level scaling effects of the notched quasi-isotropic laminate are investigated. It is found that a strength reduction with increasing size of the specimens has been obtained in experiment and this trend has been captured computationally. The ply-level …
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Revealing Socially Undesirable Information: A Comparison of Bipolar Adjective Scaling Methods
… the present study examined two bipolar adjective scaling methods (paired-comparison and semantic differential) to determine scaling effects on test taker reports of socially undesirable information on a self-report personality measure of conscientiousness. Results indicate that no differences …
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Simulating the performance of the 24 ft. installed MinWaterCSP axial flow fan
… standardized tests, due to geometric and scaling effects. Furthermore, in large ACC installations it is often not feasible to install the instrumentation required to analyse the fans installed performance and resulting flow field, which brings about more uncertainty regarding their …
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Evaluation of Scale Effects in Load-Displacement Response of Drilled Shafts Based on Field Load Tests
… were collected as part of an evaluation of scaling effects in load-displacement response of drilled shaft foundations. Drilled shafts ranging in diameter from 2 to 9.8 feet with lengths of embedment ranging from approximately 13 to 250 feet were collected as part of this study. The dataset …
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Time Aliasing Methods of Spectrum Estimation
… have focused on the elimination of time aliasing effects in the frequency domain in order to improve the representation of reconstructed signals in the time domain and have not addressed the issues associated with spectrum analysis. Proper use of time aliasing methods of spectrum analysis requires …
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Power conversion and scaling for vanishingly small satellites with electric propulsion
… systems. In particular, we discuss the effects of and component requirements necessary for scaling the converter to the size and weight required for a board-level-integrated femtosatellite incorporating several single-emitter thrusters for propulsion and attitude control. This comprises …
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Experimental investigation of optical and electrical properties of various explosive fireballs
… and Nitromethane were utilized to assess the effects of varied carbon content on each of the aforementioned properties. Furthermore, the ambient pressure was manipulated to alter kinetics and simulate blast scaling effects. Lastly, the ambient environment was varied between air and an inert …
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The metabolism of living space : allometric scaling of energy use in UK domestic buildings
… of building geometry and social practices on scaling relationships relating to domestic energy consumption. Scaling relationships relating to the physical building properties have been studied extensively, however none directly assess how total energy usage scales across the domestic building …
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