Thematische Bibliographien / Low wind

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Auswahl der wissenschaftlichen Literatur zum Thema „Low wind“

Autor: Grafiati

Veröffentlicht am 24. Mai 2025

Zuletzt aktualisiert am 30. Mai 2025

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Zeitschriftenartikel zum Thema "Low wind"

Khaghaninia, S., S. Mohammadi, A. Srafrazi, K. Nejad und R. Zahiri. „Geometric Morphometric Study on Geographic Dimorphism of Coding Moth Cydia Pomonella (Lepidoptera, Tortricidae) from North West of Iran“. Vestnik Zoologii 45, Nr. 5 (01.01.2011): e-20-e-28. http://dx.doi.org/10.2478/v10058-011-0028-z.

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Geometric Morphometric Study on Geographic Dimorphism of Coding MothCydia Pomonella(Lepidoptera, Tortricidae) from North West of IranDuring years 2003-2004, nine geographical populations of codling moth Cydia pomonella (Linnaeus) from 4 north western provinces of Iran were collected. By preparing 575 images from fore wings and 564 from hind wings, a total of 15 and 11 landmarks were determined for fore and hind wings, respectively. With transforming of landmark's geometrical data into partial warp scores, 26 and 18 scores were obtained for fore and hind wings, respectively. Canonical correlation analysis (CCA) revealed significant correlation between environmental parameters and wing shape variables. Among environmental parameters, wind speed showed the highest correlation with wing shape variables whereas, the correlation between latitude, relative humidity as well as amount of precipitation and wing shape variables was low. Considering the effect of various environmental parameters on wing shape, wind speed was determined as important parameter affecting geographic dimorphism. Among the populations collected from different regions, two geographic population pairs; Meshkinshahr-Mahneshan and Zandjan-Khoramdareh were selected as representative of low and high windy regions, respectively. Relative warp analysis (RWA) of fore and hind wings shape variables in the areas with high and low wind showed shorter and wider fore wings as well as slender and narrower hind wings in populations from high windy regions compared with populations from low wind regions. Centroid size of fore and hind wings in high windy area populations were smaller compared with those from low windy ones as revealed by t-test. The results showed aerodynamic shape and small size of wings are as adapted traits for powerful flight and its control in high windy regions.

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Lawrence, W., D. Langridge und D. Johnston. „Low wind speed wind generation scheme“. Renewable Energy 4, Nr. 5 (Juli 1994): 489–94. http://dx.doi.org/10.1016/0960-1481(94)90211-9.

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Furevik, Birgitte Rugaard, Harald Schyberg, Gunnar Noer, Frank Tveter und Johannes Röhrs. „ASAR and ASCAT in Polar Low Situations“. Journal of Atmospheric and Oceanic Technology 32, Nr. 4 (April 2015): 783–92. http://dx.doi.org/10.1175/jtech-d-14-00154.1.

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AbstractForecasting and monitoring polar lows are, to a large degree, based on satellite observations from passive radiometers and from scatterometer winds in addition to synoptic observations and numerical models. Synthetic aperture radar (SAR) brings higher resolution compared to other remotely sensed sources of ocean wind, such as scatterometer data and passive microwave wind products. The added information in polar low situations from SAR and the increased-resolution scatterometer wind fields are investigated. Statistically, higher variability in the MetOp Advanced Scatterometer (ASCAT) wind is clearly found during polar low situations compared to all situations. Slightly more variability is also seen in the ASCAT 12.5-km wind product compared to the operational European Centre for Medium-Range Weather Forecasts (ECMWF) model surface winds. In two analyzed polar low cases, Environmental Satellite (Envisat) Advanced SAR (ASAR) images reveal numerous interesting features, such as the sharp fronts and the location and strength of the strongest wind field in the polar low. It is likely that if SAR images are available to operational weather forecasting, that it can in some cases lead to earlier detection of polar lows. However, a reliable wind field from SAR is still needed.

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Berkovic, Sigalit, und Pinhas Alpert. „A Synoptic Study of Low Troposphere Wind at the Israeli Coast“. Open Atmospheric Science Journal 12, Nr. 1 (13.08.2018): 80–106. http://dx.doi.org/10.2174/1874282301812010080.

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Objective:This research is dedicated to the study of the feasibility of surface wind downscaling from 925 or 850 hPa winds according to synoptic class, season and hour.Methods:Two aspects are examined: low tropospheric wind veering and wind speed correlation and verification of the ERA-Interim analysis wind by comparison to radiosonde data at Beit Dagan, a station on the Israeli coast.Results:Relatively small (< 60°) cross angles between the 1000 hPa wind vector and the 925 hPa or 850 hPa wind vector at 12Z and high correlation (0.6-0.8) between the wind speed at the two levels were found only under winter lows. Relatively small cross angles and small wind speed correlation were found under highs to the west and Persian troughs.The verification of ERA-Interim analysis in comparison with radiosonde data has shown good prediction of wind direction at 12Z at 1000, 925 and 850 hPa levels (RMSE 20°-60°) and lower prediction quality at 1000 hPa at 0Z (RMSE 60°-90°). The analysis under-predicts the wind speed, especially at 1000 hPa. The wind speed RMSE is 1-2 m/s, except for winter lows with 2-3 m/s RMSE at 0Z, 12Z at all levels.Conclusion:Inference of surface wind may be possible at 12Z from 925 or 825 hPa winds under winter lows. Inference of wind direction from 925 hPa winds may be possible under highs to the west and Persian troughs. Wind speed should be inferred by interpolation, according to historical data of measurements or high resolution model.

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Song, Hai Hui, Jian Jun Wang, Zhi Hua Hu und Jin Zhou. „Research on Low-Wind-Speed Wind Power“. Applied Mechanics and Materials 448-453 (Oktober 2013): 1811–14. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1811.

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For high-wind-speed wind power development and problems, propose development and application of low-wind-speed wind power (LWSP). Analysis of the characteristics of LWSP , advantages and necessity of development and application of it. Research the key technologies of LWSP development. It ultimately lay the foundation for research, development and application of LWSP technologies.

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Nasrul, Muhammad, und Illa Rizianiza. „Shrouded wind turbine for low wind speed“. IOP Conference Series: Materials Science and Engineering 1034, Nr. 1 (01.02.2021): 012042. http://dx.doi.org/10.1088/1757-899x/1034/1/012042.

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Conley, Stephen A., Ian C. Faloona, Donald H. Lenschow, Anna Karion und Colm Sweeney. „A Low-Cost System for Measuring Horizontal Winds from Single-Engine Aircraft“. Journal of Atmospheric and Oceanic Technology 31, Nr. 6 (01.06.2014): 1312–20. http://dx.doi.org/10.1175/jtech-d-13-00143.1.

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Abstract The implementation and accuracy of a low-rate (~1 Hz) horizontal wind measurement system is described for a fixed-wing aircraft without modification to the airframe. The system is based on a global positioning system (GPS) compass that provides aircraft heading and a ground-referenced velocity, which, when subtracted from the standard true airspeed, provides estimates of the horizontal wind velocity. A series of tests was performed flying “L”-shaped patterns above the boundary layer, where the winds were assumed to be horizontally homogeneous over the area bounded by the flight (approximately 25 km2). Four headings were flown at each altitude at a constant airspeed. Scaling corrections for both heading and airspeed were found by minimizing the variance in the 1-s wind measurements; an upper limit to the error was then computed by calculating the variance of the corrected wind measurements on each of the four headings. A typical uncertainty found in this manner tends to be less than 0.2 m s−1. The measurement system described herein is inexpensive and relatively easy to implement on single-engine aircraft.

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Mohd Hafiz, Mohd Noh, Abdul Hamid Ahmad Hussein, Rashid Helmi, Wisnoe Wirachman und Syahmi Nasir Mohd. „Wind Tunnel Experiment for Low Wind Speed Wind Turbine Blade“. Applied Mechanics and Materials 110-116 (Oktober 2011): 1589–93. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.1589.

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Environment and green energy awareness are two main factors why this study has been carried out. This research is focused on aerodynamics study for airfoil structure modification based on NACA 0044 and NACA 0063 by using wind tunnel experiment. Aerodynamic characteristics such as lift coefficient, CL, drag coefficient, CD, lift to drag ratio and cell relative velocity has been investigated in this study. CFD simulation has been carried out at the early stage of the investigation (for NACA 0044 and NACA 0063), and a new airfoil profile had been created (0044-63) by modified the chord length and the location of maximum thickness of the airfoil by using the modified NACA Four-Digit Series. Wind tunnel experiment has been take place for three different wind speeds from 25m/s, 35m/s and 45m/s at various angles of attack from 0o to 40o with 5o incremental for the respective airfoil. The results show that the modified 0044-63 produced the better lift coefficient and this airfoil has been fabricated and tested in the wind tunnel experiment in order to validate the CFD result. This paper reports the result of aerodynamics characteristics for respective new airfoil and it shows that at angle of attack between 5 o to 15 o, this airfoil produced good lift to drag ratio value. Also, by modified the location of maximum thickness 30% to the trailing edge give the increment of lift to drag ratio produced approximately 15% and at the same time, give insignificant changes to the drag coefficient value.

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Bowen, Brent M. „Improved Wind and Turbulence Measurements Using a Low-Cost 3-D Sonic Anemometer at a Low-Wind Site“. Open Atmospheric Science Journal 2, Nr. 1 (09.07.2008): 131–38. http://dx.doi.org/10.2174/1874282300802010131.

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A year of data from sonic anemometer and mechanical wind sensors was analyzed and compared at a low-wind site. Results indicate that 15-minute average and peak 1-second wind speeds (u) from the sonic agree well with data derived from a co-located cup anemometer over a wide range of speeds. Wind direction data derived from the sonic also agree closely with those from a wind vane except for very low wind speeds. Values of standard deviation of longitudinal wind speed (σu) and wind direction fluctuations (σø) from the sonic and mechanical sensors agree well for times with u > 2 ms-1 but show significant differences with lower u values. The most significant differences are associated with the standard deviation of vertical wind fluctuations (σw): the co-located vertical propeller anemometer yields values increasingly less than those measured by the sonic anemometer as u decreases from 2.5 approaching 0 ms-1. The combination of u over-estimation and under-estimation of σw from the mechanical sensors at low wind speeds causes considerable underestimation of the standard deviation of vertical wind angle fluctuations (σø), an indicator of vertical dispersion. Calculations of σø from sonic anemometer measurements are typically 5° to 10° greater than from the mechanical sensors when the mechanical instruments indicate that σø < 5° or so. The errors with the propeller anemometer, cup anemometer and wind vane, caused by their inability to respond to higher frequency (smaller scale) turbulent fluctuations, can therefore lead to large (factors of 2 to 10 or more) errors in both the vertical and horizontal dispersion during stable conditions with light winds. The sonic anemometer clearly provides more accurate and reliable wind data than the mechanical wind sensor with u < 2.5 ms-1

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Chen, Sina, Ari Laor, Ehud Behar, Ranieri D. Baldi, Joseph D. Gelfand, Amy E. Kimball, Ian M. McHardy, Gabor Orosz und Zsolt Paragi. „Windy or Not: Radio Parsec-scale Evidence for a Broad-line Region Wind in Radio-quiet Quasars“. Astrophysical Journal 975, Nr. 1 (23.10.2024): 35. http://dx.doi.org/10.3847/1538-4357/ad74fc.

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Abstract Does a broad-line region (BLR) wind in radio-quiet (RQ) active galactic nuclei (AGN) extend to parsec scales and produce radio emission? We explore the correlations between a parsec-scale radio wind and the BLR wind in a sample of 19 RQ Palomar–Green quasars. The radio wind is defined based on the spectral slope and the compactness of the emission at 1.5–5 GHz, and the BLR wind is defined by the excess blue wing in the C iv emission line profile. The five objects with both radio and BLR wind indicators are found at high Eddington ratios, L/L Edd (≥0.66), and eight of the nine objects with neither radio nor BLR winds reside at low L/L Edd (≤0.28). This suggests that the BLR wind and the radio wind in RQ AGN are related to a radiation-pressure-driven wind. Evidence for free–free absorption by AGN photoionized gas, which flattens the spectral slope, is found in two objects. Radio outflows in three low-L/L Edd (0.05–0.12) objects are likely from a low-power jet, as suggested by additional evidence. The presence of a mild equatorial BLR wind in four intermediate-L/L Edd (0.2–0.4) objects can be tested with future spectropolarimetry.

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Dissertationen zum Thema "Low wind"

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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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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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.
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, and Â±3% with a turbulence intensity ?0.11% at full speed using a CTA, affirming the tunnel?s viability as a demonstration platform. Spectral density plots in the boundary layer exhibit typical behavior of fully developed equilibrium turbulent flow with an intertial sub-range present. Future testing of a flat-plate wake for drag modification is planned.

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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 to provide an attractive solution in terms of economics and technical merits.

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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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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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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 numerical model is further applied to investigate the tropical cyclone low-level wind structure evolution during the mature stage with observations. Three basic features at the mature stage are observed: the outward expansion of eyewall, the reduction of intensity and the increase of tangential wind in the outer spiral bands. Model simulations show that the outer circulation expansion is accompanied by the outward migration of diabatic heating at mid-level in the eyewall. The outward movement of eyewall is caused by the opposing angular momentum transports. Consequently, the intensity decays due to the angular momentum conservation and cyclostrophic adjustment, which is captured in a new analytic pressure-wind relationship derived from the λ model. To investigate the relationship between the tropical cyclone damage and low-level wind structure, the λ model is used to reconstruct the historical wind structure of hurricanes that allows us, for the first time, to calculate the correlation of damage with the integrated wind profile of all hurricanes at landfall since 1988. We find that those metrics, which include the horizontal wind structure, rather than just maximum intensity, are better correlated with the hurricane cost. The vertical wind shear over the main development region of hurricanes plays a more dominant role than the sea surface temperature in controlling these metrics and therefore also ultimately the cost of hurricanes.

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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_md. When flying in tail winds the velocity was less than V_md, while flying in head winds the velocity was higher than Vmd. A family of solutions was found with varying times of flight and varying fuel amounts consumed which will aid the operator in choosing a flight plan depending on a desired landing time. At certain parts of the flight, the turning terms in the energy constraint equation were found to be significant. An analysis of a simpler vertical plane cruise optimal control problem was used to explain some of the characteristics of the vertical plane NLP results.
Master of Science

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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 the case of the Helicopter Multi-Block (HMB2) CFD method from Liverpool University. The present PhD thesis aims to provide an all-Mach-number capability to the HMB2 method, by implementing modified Roe schemes to account for low-Mach flows. For 2D cases, the modified Roe schemes showed great improvement in the convergence and the quality of the solution, when compared with the Original Roe and Osher schemes, and the Low-Mach Roe scheme showed the best performance. With the low-Mach capability included in the compressible solver, both MEXICO and NREL Annex XX experiments were simulated. A detailed analysis of the velocity field behind the MEXICO rotor was performed, where the low-Mach scheme (LM-Roe) showed less sensitivity on the grid size than the Osher scheme. Accurate prediction of wind turbine wake breakdown is also important for the performance analysis of the turbines and their optimal positioning within tightly-spaced wind farms. Using a fine mesh able to preserve the vortices up to 8R downstream the MEXICO rotor plane, the instabilities on the wake leading to vortex pairing were captured. FFTs of the axial velocity component enabled to identify the main harmonics in the wake. In the stable region, the wake was a perfect spiral and the main frequency was the bladepassing one. An approximate exponential growth was then observed and in the region where instabilities were present, higher frequencies dominated, leading an oscillatory pattern. Simple wake models were also investigated and a combination between a kinematic model to account for the wake initial expansion and a field model to account for the far wake decay was proposed, showing good agreement with the CFD solution. With the correct set of constants, it was proved that this simple model can be used to approximate the behaviour of wind turbine wakes with minimal computational cost. Another consequence of the increased size of wind turbines is that their stiffness lowers and aeroelasticity therefore plays an important role, since the blades can suffer great deformations. To account for the blade deformations, a tightly coupled CFD-CSD method was employed to analyse the MEXICO and NREL Annex XX wind turbines. For the latter, the tower and nacelle were considered as stiff bodies and the blades were allowed to deform. As a result of the aeroelastic calculations, the blades showed deformation in bending (towards the tower). The maximum deflections were present after the blades had passed in front of the tower, and maximum amplitudes of 0.59%R, at 20m/s were observed.

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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 friendly. They can be installed as separate units and they are sustainable alternative energy solutions. Installation, cost and performance are crucial issues of WT and PV applications, and are based on the terrain and climate where the renewable are installed. The efficiency of WTs and PV modules has increased, while their cost has declined continuously. However, a PV system still has installatio n costs around two times more expensive per watt than WTs. Most WTs using current technology can be financially worthwhile for high wind speed areas, having wind speeds greater than 6.4 m/s at 10 m hub height, but most rural areas have wind speeds of less than 6 m/s at the same height. Therefore, Low Wind Speed Turbines (LWSTs) have evolved, by increasing rotor diameter and while maintaining similar generator capacity. This is to reduce Levelized Cost of Energy (LCOE) for WTs in low wind speed areas. This thesis proposes simple cost models, namely the Sum-component cost model and the Total-cost model in order to calculate the LCOE of LWSTs. In addition, novel aspects of this thesis are that the optimization processes of stand-alone hybrid WT-PV systems and hybrid WT-PV systems using batteries at peak demand in remote area power systems provide simple, fast and flexible methods, by applying Multi-objective Evolutionary Algorithm (MOEA). The MOEA can analyze complex objective problems a nd provide an accurate multi-objective method. Results from relevant case studies show that the cost models and the optimization processes proposed are novel and are valuable tools for analysis and design, including the approaches for improving the system reliability and for estimating the Initial Capital Cost (ICC) of WTs having different rated wind speeds. The proposed algorithms are generic and can be utilized for other energy planning problems.

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Bücher zum Thema "Low wind"

Barlow, Jewel B. Low-speed wind tunnel testing. 3. Aufl. New York: Wiley, 1999.

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Bell, James H. Contraction design for small low-speed wind tunnels. Stanford, Calif: Stanford University, Department of Aeronautics and Astronautics, 1988.

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S, Walker Betty, Millard Betty F und United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., Hrsg. Experimental results for the Eppler 387 airfoil at low Reynolds numbers in the Langley Low-Turbulence Pressure Tunnel. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Division, 1988.

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United States. National Aeronautics and Space Administration., Hrsg. Integral method of wall interference correction in low-speed wind tunnels. Washington, DC: National Aeronautics and Space Administration, 1987.

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Watmuff, J. H. Design of a new contraction for the ARL low speed wind tunnel (U). Melbourne, Australia: Aeronautical Research Laboratories, 1986.

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United States. National Aeronautics and Space Administration., Hrsg. NASA Lewis 9-by 15-foot low-speed wind tunnel user manual. [Washington, DC]: National Aeronautics and Space Administration, 1993.

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Bell, J. H. Contraction design for small low-speed wind tunnels. [Washington, DC: National Aeronautics and Space Administration, 1988.

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J, Engebretson M., Takahashi K und Scholer M. 1940-, Hrsg. Solar wind sources of magnetospheric ultra-low-frequency waves. Washington, DC, USA: American Geophysical Union, 1994.

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Buchteile zum Thema "Low wind"

Holmes, John D., und Seifu A. Bekele. „Low-rise buildings“. In Wind Loading of Structures, 263–91. Fourth edition. | Boca Raton : CRC Press, 2021. |: CRC Press, 2020. http://dx.doi.org/10.1201/9780429296123-8.

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Wood, David. „Starting and Low Wind Speed Performance“. In Small Wind Turbines, 101–17. London: Springer London, 2011. http://dx.doi.org/10.1007/978-1-84996-175-2_6.

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Guerrero-Lemus, Ricardo, und Les E. Shephard. „Wind Energy“. In Low-Carbon Energy in Africa and Latin America, 261–78. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52311-8_10.

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Cârsteanu, Alin A., und Jorge J. Castro. „Extreme Events Under Low-Frequency Wind Speed Variability and Wind Energy Generation“. In Wind Energy, 119–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-33866-6_21.

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Batill, Stephen M., und Robert C. Nelson. „Low Speed, Indraft Wind Tunnels“. In Lecture Notes in Engineering, 25–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83831-6_2.

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Cosack, N., Stephen Emeis und M. Kühn. „On the Influence of Low-Level Jets on Energy Production and Loading of Wind Turbines“. In Wind Energy, 325–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-33866-6_61.

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Guo, Hui, Hongxing Yang, Yu Zhou und David Wood. „Unsteady Characteristics of Flow Around an Airfoil at High Angles of Attack and Low Reynolds Numbers“. In Wind Energy, 211–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-33866-6_38.

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Raju, S. V. S. K. Prasad, M. Govindaraju und T. Satish Kumar. „Applicability of Low-Cost Duct-Shaped Wind Turbine for Domestic Purpose and Low Wind Speed“. In Lecture Notes in Mechanical Engineering, 405–14. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1769-0_37.

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Suleiman, Mutaz, und Ahmed Elshaer. „Low-Rise Modular Structure Wind Load Evaluation“. In Lecture Notes in Civil Engineering, 513–24. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-34027-7_34.

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Atlas, David. „Radar Detection of Low-Level Wind Shear“. In Reflections: A Memoir, 113–15. Boston, MA: American Meteorological Society, 2001. http://dx.doi.org/10.1007/978-1-935704-07-2_11.

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Konferenzberichte zum Thema "Low wind"

Radulescu, Andrei Viorel, und Ioan Serban. „Series-Connected Low Power Wind Turbines for Small-Scale Wind Farms“. In 2024 IEEE International Conference And Exposition On Electric And Power Engineering (EPEi), 182–86. IEEE, 2024. http://dx.doi.org/10.1109/epei63510.2024.10758040.

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Bottasso, Carlo L., Alessandro Croce und Luca Sartori. „Free-form Design of Low Induction Rotors“. In 33rd Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0488.

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Teriaca, L. „Solar wind acceleration in low density regions“. In SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP, 2003. http://dx.doi.org/10.1063/1.1618605.

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Watanabe, H., M. Kojima, Y. Kozuka, Y. Yamauchi und H. Misawa. „Source regions of very low speed solar winds“. In Proceedings of the eigth international solar wind conference: Solar wind eight. AIP, 1996. http://dx.doi.org/10.1063/1.51371.

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Giacalone, J., und J. R. Jokipii. „Low-energy ion acceleration at quasi-perpendicular shocks“. In Proceedings of the eigth international solar wind conference: Solar wind eight. AIP, 1996. http://dx.doi.org/10.1063/1.51414.

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Kikuchi, Ryota, Takashi Misaka und Shigeru Obayashi. „Real-Time Flow Prediction of Low-Level Atmospheric Turbulence“. In 33rd Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-1469.

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Noyes, Carlos, Chao Qin und Eric Loth. „Low Mass, Morphing Rotor for Extreme Scale Wind Turbines“. In 35th Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-0924.

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Ohmi, Tomoaki. „Evidences for Low-speed Streams from Small Coronal Hole“. In SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP, 2003. http://dx.doi.org/10.1063/1.1618560.

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Hudson, H. S., A. L. MacKinnon und N. R. Badnell. „Remote sensing of low-energy SEPs via charge exchange“. In SOLAR WIND 13: Proceedings of the Thirteenth International Solar Wind Conference. AIP, 2013. http://dx.doi.org/10.1063/1.4810979.

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Noughabi, Amir Karimi, und Mehran Tadjfar. „Cross-Wind Influence on Low Aspect Ratio Wings at Low Reynolds Numbers“. In ASME 2013 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fedsm2013-16523.

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Annotation:

The aerodynamics of the low aspect ratio (LAR) wings is of outmost importance in the performance of the fixed-wing micro air vehicles (MAVs). The flow around these wings is widely influenced by three dimensional (3D) phenomena: including wing-tip vortices, formation of laminar bubble, flow separation and reattachment, laminar to turbulent transition or any combination of these phenomena. All the recent studies consider the aerodynamic characteristics of the LAR wings under the effect of the direct wind. Here we focus on the numerical study of the influence of cross-wind on flow over the inverse Zimmerman wings with the aspect ratios (AR) between 1 and 2 at Reynolds numbers between 6×104 and 105. We have considered cross-wind’s angles from 0° to 40° and angle of attack from 0° to 12°. The results show that lift and drag coefficient generally decrease when the angle of the cross-wind is increased.

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Berichte der Organisationen zum Thema "Low wind"

Rasson, Joseph E. Low-Maintenance Wind Power System. Office of Scientific and Technical Information (OSTI), September 2010. http://dx.doi.org/10.2172/1000354.

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Preus, Robert W., und DOE Project Officer - Keith Bennett. ARE660 Wind Generator: Low Wind Speed Technology for Small Turbine Development. Office of Scientific and Technical Information (OSTI), April 2008. http://dx.doi.org/10.2172/927424.

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Todd E. Mills und Judy Tatum. Hi-Q Rotor - Low Wind Speed Technology. Office of Scientific and Technical Information (OSTI), Januar 2010. http://dx.doi.org/10.2172/971423.

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Bowen, B. IMPROVED WIND AND TURBULENCE MEASUREMENTS USING A LOW-COST 3-D SONIC ANEMOMETER AT A LOW-WIND SITE. Office of Scientific and Technical Information (OSTI), Mai 2007. http://dx.doi.org/10.2172/926051.

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Ghee, Terence A., und Nigel J. Taylor. Low-Speed Wind Tunnel Tests on a Diamond Wing High Lift Configuration. Fort Belvoir, VA: Defense Technical Information Center, Juni 2000. http://dx.doi.org/10.21236/ada377908.

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Chobot, Anthony, Debarshi Das, Tyler Mayer, Zach Markey, Tim Martinson, Hayden Reeve, Paul Attridge und Tahany El-Wardany. Novel Low Cost, High Reliability Wind Turbine Drivetrain. Office of Scientific and Technical Information (OSTI), September 2012. http://dx.doi.org/10.2172/1050987.

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Post, Brian K., Phillip C. Chesser, Alex C. Roschli, Lonnie J. Love und Katherine T. Gaul. Large-Scale Additive Manufacturing for Low Cost Small-Scale Wind Turbine Manufacturing. Office of Scientific and Technical Information (OSTI), September 2018. http://dx.doi.org/10.2172/1493993.

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Post, Brian, Phillip Chesser, Alex Roschli, Lonnie Love und Katherine Gaul. Large-Scale Additive Manufacturing for Low Cost Small-Scale Wind Turbine Manufacturing. Office of Scientific and Technical Information (OSTI), Januar 2020. http://dx.doi.org/10.2172/1606760.

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Corgnale, Claudio, Theodore Motyka, Alex Keane und Christopher Capuano. Efficient and low-cost hydrogen production by wind power driven water electrolysis. Office of Scientific and Technical Information (OSTI), Juni 2021. http://dx.doi.org/10.2172/1842337.

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Miller, Nicholas W., Bruno Leonardi, Robert D'Aquila und Kara Clark. Western Wind and Solar Integration Study Phase 3A: Low Levels of Synchronous Generation. Office of Scientific and Technical Information (OSTI), November 2015. http://dx.doi.org/10.2172/1227265.

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