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Dissertations / Theses on the topic 'Low winds'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Anderson, Bruce T. "Investigation of summertime low-level winds over the Gulf of California and the Southwestern United States /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035918.

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2

Dahmer, Marc R. Market Patrick S. "Investigating near-surface wind fields as influenced by low-level jet occurrences in Missouri." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6555.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on November 13, 2009). Thesis advisor: Dr. Patrick S. Market Includes bibliographical references.

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3

Steinhoff, Daniel Frederick. "Cyclogenesis Near the Adélie Coast and Influence of the Low-level Wind Regime." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204812781.

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4

Sridharan, S. "Investigation of middle atmospheric winds, waves and tides from low latitudes." Thesis, IIG, 2002. http://localhost:8080/xmlui/handle/123456789/1604.

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A Thesis submitted to the Moanonmaniam Sundaranar University, Tirunelveli, in partial fulfilment of the requirements for the Ph.D. degree under the guidance of Dr. S. Gurubaran, Equatorial Geophysical Research Laboratory, Tirunelveli and Dr. N. Arunachalam, M.S. University, Tirunelveli

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5

Sridharan, S. "Investigation of middle atmospheric winds, waves and tides from low latitudes." Thesis, Indian Institute of Geomagnetism, Mumbai, 2002. http://localhost:8080/xmlui/handle/123456789/221.

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6

Simon, M. N., I. Pascucci, S. Edwards, et al. "TRACING SLOW WINDS FROM T TAURI STARS VIA LOW-VELOCITY FORBIDDEN LINE EMISSION." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622166.

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Using Keck/HIRES spectra (Delta v similar to 7 km s(-1)) we analyze forbidden lines of [O I] 6300 angstrom, [O I] 5577 angstrom. and [S II] 6731 angstrom. from 33 T Tauri stars covering a range of disk evolutionary stages. After removing a high-velocity component (HVC) associated with microjets, we study the properties of the low-velocity component (LVC). The LVC can be attributed to slow disk winds that could be magnetically (magnetohydrodynamic) or thermally (photoevaporative) driven. Both of these winds play an important role in the evolution and dispersal of protoplanetary material. LVC em

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7

Koleiny, Ali Fox Neil I. "An investigation into the contribution of the low-level jet (LLJ) to the available wind resource in Missouri." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6574.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on November 18, 2009). Thesis advisor: Dr. Neil I. Fox. Includes bibliographical references.

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8

Davila, Ricardo Cruz. "A Study of Magnetic Activity Effects on the Thermospheric Winds in the Low Latitude Ionosphere." DigitalCommons@USU, 1994. https://digitalcommons.usu.edu/etd/6808.

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The purpose of this thesis is to examine the effects of magnetic activity on the low latitude F-region thermospheric winds. The F-region (120-1600 km) is a partially ionized medium where O+ and O are the major ion and neutral species, respectively. The thermospheric winds at these altitudes are driven primarily by pressure gradient forces resulting from the solar heating during the day and cooling at night. For this study, we use measured Fabry-Perot Interferometer (FPD winds at Arequipa (16.5°S, 71.5°W) and measured FPI and Incoherent Scatter Radar (ISR) winds at Arecibo (18.6°N, 66.8°W). Pre

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9

Wannberg, Veronica Elaine. "Quantitative Uncertainty of Chemical Plume Transport in Low Wind Speeds Using Measured Field Data and Stochastic Modeling." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2570.pdf.

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10

Wos, Kenneth A. Davidson Kenneth L. "A climatology of polar low occurrences in the Nordic Seas and an examination of katabatic winds as a triggering mechanism." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School; Available from the National Technical Information Service, 1992. http://edocs.nps.edu/npspubs/scholarly/theses/1992/Dec/92Dec_Wos.pdf.

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11

Wos, Kenneth A. "A climatology of polar low occurrences in the Nordic Seas and an examination of katabatic winds as a triggering mechanism." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23831.

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This study examines polar low formation frequency, origin region and storm tracks in the entire Nordic Sea region for a complete polar low season and identifies the prevailing synoptic situation common to polar low formation. The number of polar lows detected through TIROS-N satellite imagery between September 1988 and May 1989 was significantly greater than one would expect from previous studies. Many polar lows were detected over the land areas of Greenland, Iceland and Svalbard away from a direct surface heat source. The storms detected over Greenland generally formed at the outflows of gla

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12

Planella, Morató Jesús. "Intermittency of turbulence in natural waters: patchiness in the thermocline of a lake under low winds and small-scale intermittency in the bottom boundary layer of a tidal flow." Doctoral thesis, Universitat de Girona, 2015. http://hdl.handle.net/10803/320432.

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Turbulence intermittency influences so many processes in natural waters on a wide range of scales. This work analyzes intermittency, both internal and external, by considering two cases: the thermocline of a small lake under low winds and the bottom boundary layer of a tidal flow. External intermittency in Lake Banyoles is studied based on patches. Variability of their sizes and turbulent scales is described using probability models, which are consistent with marine turbulence results. Dynamics of mixing depends on the phase of the dominant internal seiche. Episodic and powerful wind gusts ge

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13

Zelenke, Brian Christopher. "An empirical statistical model relating winds and ocean surface currents : implications for short-term current forecasts." Thesis, Connect to the title online, 2005. http://hdl.handle.net/1957/2166.

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14

Calderon, Dario. "Plunging low aspect ratio wings in low Reynolds number flows." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616645.

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A growing desire exists to develop Micro Air Vehicles (MA Vs) that fall within a 15cm span. Their small scale and low operating flight speeds encourage a low Reynolds Number (Re) regime, in the order of Re - 104 - 105 . Wings under these conditions are highly susceptible to separated flows, posing a significant challenge for the MA V. Natural flyers are able to confront these issues through flapping flight, which has inspired an entire research field on the aerodynamics of oscillating wings. While the number of parameters that govern the problem is exhaustive, studies are required to explain t

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15

Sathaye, Sagar Sanjeev. "Lift distributions on low aspect ratio wings at low Reynolds numbers." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0427104-091112.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: Low Reynolds Number; Micro Air Vehicle; Low Aspect Ratio; Spanwise pressure measurements; Spanwise Lift Distributions. Includes bibliographical references (p. 84-85).

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16

Frith, Steven Pierre. "Flapless control for low aspect ratio wings." Thesis, University of Manchester, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577239.

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17

Rullan, Jose Miguel. "The Aerodynamics of Low Sweep Delta Wings." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29386.

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The aerodynamics of wings with moderately swept wings continues to be a challenging and important problem due to the current and future use in military aircraft. And yet, there is very little work devoted to the understanding of the aerodynamics of such wings. The problem is that such wings may be able to sustain attached flow next to broken-down delta-wing vortices, or stall like two-dimensional wings, while shedding vortices with generators parallel to their leading edge. To address this situation we studied the flow field over diamond-shaped planforms and sharp-edged finite wings. Possible

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18

Tregidgo, Luke. "Low aspect-ratio rigid, flexible and membrane wings at low Reynolds numbers." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577740.

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The interest in developing small, payload-carrying Micro Air Vehicles (MAVs) with a maximum linear dimension of six inches or below is as strong as ever, with both military and civilian bodies interested in the remote sensing capabilities such a vehicle would provide. However significant challenges remain in developing such aircraft and the research presented here addresses specific issues in the field of fluid-structure interactions for flexible wings. Wind tunnel tests were conducted on rectangular, aspect-ratio-two, rigid and flexible wings (including membrane wings) in an open-jet, closed-

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19

Marchenko, S. V. "Wind inhomogeneities in low-Z environment : observations." Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1776/.

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We discuss the results of time-resolved spectroscopy of three presumably single Population I Wolf-Rayet stars in the Small Magellanic Cloud, where the ambient metallicity is $sim 1/5 Z_odot$. We were able to detect and follow numerous small-scale wind-embedded inhomogeneities in all observed stars. The general properties of the moving features, such as their velocity dispersions, emissivities and average accelerations, closely match the corresponding characteristics of small-scale inhomogeneities in the winds of Galactic Wolf-Rayet stars.

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20

Harvey, Scott A. "Low-speed wind tunnel flow quality determination." Thesis, Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/5584.

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Approved for public release; distribution is unlimited.<br>lected points. Incorporated instrumentation includes pressure transducers attached to a pitot-static tube, wall static pressure taps, and a pressure rake; a hotwire anemometry system, and a linear traverse system. These were integrated with a data acquisition (DAQ) processor with analog to digital conversion and digital I/O boards, and controlled using in-house developed LabVIEW software. Testing showed a maximum axial velocity of 38 m/s, which is 84% of the tunnel?s rated speed. The 2-D flow uniformity was within Â±7% by pressure rake

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21

Usui, Michiko. "AEROMECHANICS OF LOW REYNOLDS NUMBER INFLATABLE/RIGIDIZABLE WINGS." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_theses/321.

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Use of an inflatable/rigidizable wing is explored for Mars airplane designs. The BIG BLUE (Baseline Inflatable-wing Glider Balloon Launched Unmanned airplane Experiment) project was developed at the University of Kentucky, with an objective to demonstrate feasibility of this technology with a flight-test of an high-altitude glider with inflatable/rigidizable wings. The focus of this thesis research was to design and analyze the wing for this project. The wings are stowed in the fuselage, inflate during ascent, and rigidize with exposure to UV light. The design of wings was evaluated by using a

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22

Keeli, Anupama. "Low frequency transmission for remote power generating systems." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41190.

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The goal of this Masters Thesis research is to evaluate alternative transmission systems from remote wind farms to the main grid using low-frequency AC technology. Low frequency means a frequency lower than nominal frequency (60/50Hz). The low-frequency AC network can be connected to the power grid at major substations via cyclo-converters that provide a low-cost interconnection and synchronization with the main grid. Cyclo-converter technology is utilized to minimize costs which result in systems of 20/16.66 Hz (for 60/50Hz systems respectively). Low frequency transmission has the potential t

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23

Alam, Muhammad Mahbubul. "Wind-driven rotodynamic pumps for low-lift applications." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359007.

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24

Prevezer, Tanya. "Wind pressure fluctuations on a low-rise building." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287236.

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25

Wang, Shuai. "The low-level wind structure of tropical cyclones." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44564.

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The main effects of tropical cyclones include high winds, extensive storm surges, and widespread flooding. These main effects are all closely related to the low-level wind structure, the height of which is about 2 km from the underlying surface. A physically based analytic model (λ model) is presented to describe the low-level wind structure of tropical cyclones in terms of one intensity measure, one size measure, and the storm meridional position. The λ model provides an accurate fit of the near-surface azimuthal wind field simulated with an idealized full-physics numerical model. This numeri

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26

Feldman, Michael A. "Efficient Low-Speed Flight in a Wind Field." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/36527.

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A new software tool was needed for flight planning of a high altitude, low speed unmanned aerial vehicle which would be flying in winds close to the actual airspeed of the vehicle. An energy modeled NLP formulation was used to obtain results for a variety of missions and wind profiles. The energy constraint derived included terms due to the wind field and the performance index was a weighted combination of the amount of fuel used and the final time. With no emphasis on time and with no winds the vehicle was found to fly at maximum lift to drag velocity, V<sub>md</sub>. When flying in tail wind

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27

Carrion, Marina. "Low mach number CFD for wind turbine analysis." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/2005639/.

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To maximise the amount of energy extracted from wind turbines, the rotor diameter has increased, reaching values of 160m in some cases. Large scale wind turbines are working at high Reynolds numbers and a wide range of flow conditions, with virtually incompressible flow present at the root and mildly compressible near the blade tips, where the Mach numbers can reach locally 0.48 for the largest wind turbines employed to date. In traditional aerodynamics, most CFD methods were designed to cope with high Mach number flows and consequently solve the compressible Navier-Stokes equations. This is t

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28

Erten, Huseyin. "The production of low alcohol wines by aerobic yeasts." Thesis, Heriot-Watt University, 1997. http://hdl.handle.net/10399/702.

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29

Gresham, Nicholas T. "Free-to-roll oscillations of low aspect ratio wings." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538123.

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30

Abtahi, Ali A. "Aspect ratio effects on wings at low Reynolds numbers." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/52330.

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In this study the primary objective was to determine the effect of aspect ratio in particular and in general the effect of three dimensionality on the flow around wings at low Reynolds numbers. It was seen that the effects observed at high Reynolds number are also present in this Re range. There is the usual increase in lift slope and this increase can even be predicted with reasonable accuracy using Prandtl's lifting line theory. In addition to the change in lift slope the zero lift angle of attack was also influenced by the aspect ratio. Through flow visualization it was ascertained that t

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31

Borujerdi, Javad. "Numerical evaluation of low-slope roofs for wind uplift." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26588.

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This dissertation contributes to an ongoing research project at the National Research Council Canada in the evaluation of roofing systems for wind uplift design. Accomplishments are grouped in two tasks. Task one provides development of a knowledge-based design module for the estimation of wind load distribution on roofs. Task two, numerical modeling using finite element methods and experiments to investigate the performance of roofing systems subjected to wind uplift loads. For the Task one, all the data of wind uplift pressure distribution on roof configurations from open literature, includi

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32

Kumaresannair, Suresh Kumar. "Simulation of fluctuating wind pressures on low building roofs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0007/NQ39782.pdf.

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33

Balaramudu, Vasanth Kumar. "Tornado-induced wind loads on a low-rise building." [Ames, Iowa : Iowa State University], 2007.

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34

Pietrzak, J. D. "Low frequency response of coastal waters to wind forcing." Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638531.

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The low frequency flow dynamics of the N.W. Aegean Sea, are investigated using a barotropic shelf circulation model, and by analysis of data from current meters deployed in Thermaikos Gulf. The performance of Groves (1955) and Lanczos-cosine filters is assessed to provide optimal low-pass filtering for the current meter records. The Lanczos-cosine filter is found to be the most effective in the present study. Time series and spectral analysis are applied to the filtered current meter records and to concurrent meteorological data. The results of these analyses show significant inputs of low fre

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35

Claudepierre, Seth G. "Solar wind driving of magnetospheric ultra-low frequency pulsations." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3315834.

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Thesis (Ph.D.)--University of Colorado at Boulder, 2008.<br>Source: Dissertation Abstracts International, Volume: 69-07, Section: B, page: 4214. Advisers: Scot R. Elkington; Keith Julien. Includes supplementary digital materials.

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36

Jones, Robin. "Aerodynamics of biplane and tandem wings at low Reynolds numbers." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.693328.

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Overcoming the difficulties associated with low Reynolds number flows has recently become a primary goal for aerodynamicists due to the growing importance of micro air vehicles (MAVs). The limiting size requirement of a six-inch wing span for MAVs combined with their inherent tendency to suffer stall due to gusts makes this significantly more challenging. The use of two-wing configurations, inspired by historical aircraft, could prove to be an effective method of overcoming this limitation. This thesis is primarily concerned with the fundamental aerodynamics associated with biplane and tandem

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37

Pitt, Ford Charles William. "Unsteady aerodynamic forces on accelerating wings at low Reynolds numbers." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608219.

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38

Sangpanich, Umarin. "Optimization of wind-solar energy systems using low wind speed turbines to improve rural electrification." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=18944.

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Electricity is significant in improving the quality of life for people in rural and remote areas in developing countries. There are two main options for Rural Electrification (RE), namely grid extension and stand-alone systems. The governments and developers face the challenges of their limitations, namely technical, economic and environmental effects of each RE choice. This thesis intends to improve RE by focusing on renewable energy technologies, namely Wind Turbine (WT) and Photovoltaic (PV) systems. They have been developed and applied to RE because they are simple and environmentally frie

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39

Joseph, Liselle AnnMarie. "Transition Detection for Low Speed Wind Tunnel Testing Using Infrared Thermography." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/78145.

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Transition is an important phenomenon in large scale, commercial, wind tunnel testing at low speeds because it is an excellent indicator of an airfoil performance. It is difficult to estimate transition through numerical techniques because of the complex nature of viscous flow. Therefore experimental techniques can be essential. Over the transition region the rate of heat transfer shows significant increases which can be detected using infrared thermography. This technique has been used predominantly at high speeds, on small models made of insulated materials, and for short test runs. Large sc

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40

Gough, Tim. "Low Reynolds number turbulent boundary layers and wakes." Thesis, University of Surrey, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360949.

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41

Schmidt, Sarah Ruth. "Computational and wind tunnel studies of shelterbelts for reduction of wind flow and wind-induced loads on low-rise buildings." [Ames, Iowa : Iowa State University], 2008.

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42

Ames, Richard Gene. "On the flowfield and forces generated by a rectangular wing undergoing moderate reduced frequency flapping at low reynolds number." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12468.

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43

Sehn, Kevin. "Aerodynamic mitigation of extreme wind loading on low-rise buildings." [Ames, Iowa : Iowa State University], 2008.

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44

Janajreh, Isam Mustafa II. "Wavelet Analysis of Extreme Wind Loads on Low-Rise Structures." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30414.

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Over the past thirty years, extensive research has been conducted with the objective of reducing wind damage to structures. Wind tunnel simulations of wind loads have been the major source of building codes. However, a simple comparison of pressure coefficients measured in wind tunnel simulations with full-scale measurements show that the simulations, in general, underpredict extreme negative pressure coefficients. One obvious reason is the lack of consensus on wind tunnel simulation parameters. The wind in the atmospheric surface layer is highly turbulent. In simulating wind loads on struc

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45

Saha, Nilanjan. "Gap Size Effect on Low Reynolds Number Wind Tunnel Experiments." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35938.

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A system was designed to measure the effect of gap size on semi-span low Reynolds number wind tunnel experiments. The lift forces on NACA 1412, NACA 2412 and NACA 4412 half wings were measured using a strain gauge balance at chord Reynolds numbers of 100,000 and 200,000 and three different gap sizes including sealed gap. Pressure distributions on both airfoil top and bottom surfaces in the chord-wise direction near the gap were recorded for these airfoils. Also recorded was the span wise pressure distribution on both the airfoil surfaces at the quarter chord section. The results revealed that

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46

Standridge, Zachary Dakotah. "Design and Development of Low-cost Multi-function UAV Suitable for Production and Operation in Low Resource Environments." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83877.

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A new flying wing design has been developed at the Unmanned Systems Lab (USL) at Virginia Tech to serve delivery and remote sensing applications in the developing world. The fully autonomous unmanned aerial vehicle (UAV), named EcoSoar, was designed with the goal of creating a business opportunity for local entrepreneurs in low-resource communities. The system was developed in such a way that local fabrication, operation, and maintenance of the aircraft are all possible. In order to present a competitive financial model for sustained drone services, EcoSoar is made with reliable low-cost mater

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47

Hu, Tianxiang. "Attenuation of self-induced roll oscillations of low-aspect-ratio wings." Thesis, University of Bath, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619294.

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Micro Air Vehicles are currently receiving growing interest because of their broad applications in many fields. However, in MA V flight tests, the onset of unwanted large-amplitude roll oscillations for various designs has been reported, which has eventually led to difficulties in flight control and such undesirable selfinduced roll oscillations were investigated in the current study. More specifically, a common low-aspect-ratio wing, an AR = 2 rectangular flat plate, was researched, with the aim being to attenuate the self-induced roll oscillation of low-aspect-ratio wings by applying various

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48

Disotell, Kevin James. "Low-Frequency Flow Oscillations on Stalled Wings Exhibiting Cellular Separation Topology." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449162356.

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49

Jeyaratnam, Jonathan Jehan. "On the low speed longitudinal stability of hypersonic waveriders." Thesis, The University of Sydney, 2020. https://hdl.handle.net/2123/22456.

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The development of hypersonic civilian transport aircraft requires solutions to a number of challenging problems in the areas of aerothermodynamics, control, aeroelasticity, propulsion and others encountered at high Mach number flight. The desire for good aerodynamic performance at high Mach numbers results in slender vehicle designs called waveriders. The stability and handling of waverider shapes at the low speeds at the take-off and landing phases of flight is not well studied. This thesis covers static and dynamic CFD simulations of the Hexafly-Int glider which have been used to obtain lon

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50

Burton, Melissa Deanne. "Effects of low frequency wind-induced building motion on occupant comfort." online access from Digital Dissertation Consortium, 2006. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3268726.

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