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 73 for “"solidity"”.
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The effect of blade solidity on the aerodynamic loss of a transonic turbine cascade
… the loss of the VPI blade for different axial solidity ratios near the design point. Ten percent changes in the solidity ratio were accomplished by varying the blade pitch and changing the blade stagger to maintain a constant throat to spacing ratio. Reaction, exit angle and exit Mach number …
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The effect of solidity on the pre- and post-stall flow in a linear compressor cascade
… blade row configuration parameters stagger and solidity on the pre-and post-stall behavior of the flow in the cascade. Tests were conducted at a solidity of 1.5, and for two stagger angles, 36.4 degrees and 25 degrees. The investigation included the use of high speed motion pictures with smoke …
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A Fundamental Study of Advance Ratio, Solidity, Turbine Radius, and Blade Profile on the Performance Characteristics of Vertical Axis Turbines (VATs)
… Specifically, the effect of advance ratio, solidity, and wake interactions were investigated. Simulations were completed in OpenFOAM using the k-ω SST turbulence model at a nominal Reynolds number of 500,000 using a NACA 0015 airfoil. To simulate the motion of the turbine, Arbitrary Mesh …
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Local and global numerical analysis of a porous screen in free-stream flow
… gaps between them decreases, which increases the solidity of the screen. The use of a free-space domain removes any artificial numerical blockage effects, consistent with a free-stream flow. Our analysis provides insights in the variation of the mean force coefficients as a function of the screen …
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Application of electrospun fiber membranes in water purification
… membranes because they are low in solidity and have open, highly interconnected porous structures. Nevertheless, liquid filtration processes are pressure driven; hence, it is crucial to understand the compressive behaviors of electrospun membranes. Compressive properties of …
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Evaluation of Barley (Hordeum vulgare L.) Stem and Root Traits that Influence Lodging
… of field-collected root systems revealed that solidity, the ratio of network area to convex area, also had a strong correlation to lodging score (r = 0.47). The SEM demonstrated that solidity was a central trait that encapsulated information from numerous other root traits. To address the …
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Towards understanding a tower: the design of the Staten Island Ferry Terminal
… certain issues of circularity, permanence, and solidity which have become recurrent pursuits of the author. This entire inquiry is presented through the utilization of photographs, drawings, and text.
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Aerodynamic broadband noise from contra-rotating open rotors
… at constant engine power, torque split and solidity. The validity of two widely used approximations for fan broadband noise predictions is also studied: Amiet's approximate BRTE model and the use of isolated airfoil theory for turbulence-cascade interaction noise. Criteria for the validity …
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An experimental method for the investigation of subsonic stall flutter in gas turbine engine fans and compressors
… of blade stagger angle, flow incidence angle and solidity on flutter speed was determined.
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Extended Momentum Model for Single and Multiple Hydrokinetic Turbines in Subcritical Flows
… is validated with experimental data of a high-solidity cross-flow hydrokinetic turbine that was previously tested at increasing rotor speeds. Turbine arrays are investigated by integrating the previous turbine model with wake sub-models to predict the plant layout maximizing the array power. An …
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A study of supersonic flow past vibrating shells and cascades
… with subsonic leading edge locus for arbitrary solidity, stagger angle, frequency, and interblade phase angle. For comparison, a two-blade solution is developed using the method of singularities. Good agreement is obtained for this special case.
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Evaluating theories of liberal hegemony and small states in U.S.-Jordanian relations since 2000
… as its main object of study the features and solidity of U.S.- Jordanian relations in the 2000s. While the power disparity between the U.S.A, as the sole superpower in the current international system, and Jordan, as a small state, is undeniably huge, it is claimed that the relations between …
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Contributions to permanent magnet wind generator design including the application of soft magnetic composites
… low speed operation with a new multi-blade, high solidity turbine. An analytical model is formulated and then used to examine the effect of several changes to the design of the wind generator. A new specification of the redesigned machine is then set. The overall performance of the redesigned …
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Wind loads for petrochemical structures
… of the wind force coefficient for higher-solidity open frame structures with respect to solidity ratio and plan aspect ratio. The model reproduced trends in experimental data from previous researchers and provided insight into the development of upper-bound wind loads for open frame …
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Tempus fugit : music and the ephemeral in architecture
I am interested in the relationship between solidity and transparency, between permanence and ephemerality, in the context of the modern city. This thesis is an exploration of transience and of social and phenomenal exchange, using music, and, more generally, sound, as a vehicle. The project is an …
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Adrift at home: National belonging and narrative form in the rooms of twentieth-century British fiction
… was once considered the sphere of fixity and solidity, in contrast to time, which was conceived as boundless and unstable; in the last few decades, human geography has countered these assumptions to show that space is also a sphere of heterogeneity. The novels I read both anticipate and …
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The effect of reaction on compressor performance
… the surprising result that, depending on how the solidity of the stage is set, 50% reaction can either result in the maximum, or the minimum, profile loss. When the solidity is set by the shape factor of the suction-surface boundary layer at the blade trailing-edge, and conventional levels of …
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Social engineering : a discourse in applied social science
… The patterns were expanded until they achieved solidity, at which point attempts were made to destroy them by bombarding them with data. To the writer's gratification, they did not collapse under the onslaught. Rather they gained in weight and explanatory power. The patterns were then pruned so …
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An architecture of a wall
… functions can create an experience of both solidity of a wall as well as the possibility of inhabiting a wall. The creation of a "place". A wall also possesses the ability to create a sense of place. This can occur not only through the provision of habitable space, but also through the …
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An Improved Streamline Curvature Approach for Off-Design Analysis of Transonic Compression Systems
… number, blade section loading (flow turning), solidity, leading edge radius, and suction surface profile. Other improvements included incorporation of loading effects on the tip secondary loss model, use of radial blockage factors to model tip leakage effects, and an improved estimate of the …
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