Academic literature on the topic 'Shroud pins'

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Journal articles on the topic "Shroud pins"

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Jubran, B. A., M. A. Hamdan, and R. M. Abdualh. "Enhanced Heat Transfer, Missing Pin, and Optimization for Cylindrical Pin Fin Arrays." Journal of Heat Transfer 115, no. 3 (1993): 576–83. http://dx.doi.org/10.1115/1.2910727.

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This paper reports an experimental investigation on the effects of interfin spacing, shroud clearance, and missing pin on the heat transfer from cylindrical pin fins arranged in staggered and in-line arrays. The interfin spacing in the span wise direction was so small that the pins were almost touching each other. It was found that the optimum interfin spacing in both spanwise and streamwise directions is 2.5 D regardless of both type of array and shroud clearance used. The effect of missing pin for various interfin spacing arrays was found to be negligible for the in-line array but more signi
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Saxena, Vikrant, Hasan Nasir, and Srinath V. Ekkad. "Effect of Blade Tip Geometry on Tip Flow and Heat Transfer for a Blade in a Low-Speed Cascade." Journal of Turbomachinery 126, no. 1 (2004): 130–38. http://dx.doi.org/10.1115/1.1643385.

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A comprehensive investigation of the effect of various tip sealing geometries is presented on the blade tip leakage flow and associated heat transfer of a scaled up HPT turbine blade in a low-speed wind tunnel facility. The linear cascade is made of four blades with the two corner blades acting as guides. The tip section of a HPT first stage rotor blade is used to fabricate the two-dimensional blade. The wind tunnel accommodates an 116 deg turn for the blade cascade. The mainstream Reynolds number based on the axial chord length at cascade exit is 4.83×105. The upstream wake effect is simulate
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Lauer, Dwight K., and Glenn R. Glover. "Early Pine Response to Control of Herbaceous and Shrub Vegetation in the Flatwoods." Southern Journal of Applied Forestry 22, no. 4 (1998): 201–8. http://dx.doi.org/10.1093/sjaf/22.4.201.

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Abstract Herbicide treatments were used at four flatwood locations in north Florida and south Georgia to compare early pine response to control of herbaceous and shrub vegetation following bedding. Treatments consisted of three levels of shrub control (none, first year, repeated) with and without first year herbaceous vegetation control. All studies were located on spodosols planted with either loblolly (Pinus taeda L.) or slash (Pinus elliottii Englem.) pine. Responses due to shrub control were about twice that of herbaceous control with height responses of 2.2, 5.0, and 6.9 ft due to first y
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Dovčiak, Martin, Peter B. Reich, and Lee E. Frelich. "Seed rain, safe sites, competing vegetation, and soil resources spatially structure white pine regeneration and recruitment." Canadian Journal of Forest Research 33, no. 10 (2003): 1892–904. http://dx.doi.org/10.1139/x03-115.

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We tested the effects of seed rain, safe sites, soil depth, overstory, and shrub layer on the establishment and recruitment of white pine (Pinus strobus L.) in aspen mixedwoods of the western Great Lakes region, U.S.A. Germin ant and seedling densities were positively related to seed rain and safe site characteristics that indicate moist conditions: high overstory basal area, decaying wood, and moss cover. Germinant and seedling densities were highest under dense overstory (>16 m2/ha) and were unrelated to shrub cover. Sapling recruitment was greatest under low overstory density (<16 m2/
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Harrington, Timothy B. "Overstory and understory relationships in longleaf pine plantations 14 years after thinning and woody control." Canadian Journal of Forest Research 41, no. 12 (2011): 2301–14. http://dx.doi.org/10.1139/x11-140.

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To develop silvicultural strategies for restoring longleaf pine ( Pinus palustris Mill.) savannas, mortality and growth of overstory pines and midstory hardwoods and abundance and species richness of herbs were studied for 14 years after pine thinning and nonpine woody control. Pine cover in thinned stands was about half of that in nonthinned stands through year 5, but it lagged by only 8% and 3% in years 9 and 14, respectively, because of vigorous crown responses. Despite a cumulative mortality of 64% of hardwood stems from prescribed fires in years 0, 4, and 9, hardwood basal area in thinned
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Нуреева, Tatyana Nureeva, Мифтахов, Timur Miftakhov, Пуряев, and Aynur Puryaev. "STRUCTURE OF AN ARTIFICIAL PINE STANDS IN THE FRESH SURAMEN OF THE KAMA REGION OF REPUBLIC OF TATARSTAN." Vestnik of Kazan State Agrarian University 10, no. 2 (2015): 117–22. http://dx.doi.org/10.12737/12515.

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The article deals with the problem forest husbrandy of artificial pine forest, growing in rich, atypical for the Scots pine soil and environmental conditions. This question is particularly relevant for the Republic of Tatarstan, because there are large areas of pine forest plantations grow, and forest sites are represented mainly by heavy loamy and clayey soils. Thus, the purpose of the study was to evaluate the structure of artificial pine plantations growing under fresh surameney. The object of research was the plotted electronic database of forest and taxation indicators stands. The methodo
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Gómez, José M., José A. Hódar, Regino Zamora, Jorge Castro, and Daniel García. "Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs." Canadian Journal of Botany 79, no. 6 (2001): 739–46. http://dx.doi.org/10.1139/b01-055.

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The spatial structure of plant communities as well as the quality and abundance of neighbours can strongly influence the intensity of herbivory suffered by a plant. In this paper, we study the effect of the association with shrubs on the ungulate herbivory suffered by Scots pine (Pinus sylvestris var. nevadensis Christ., Pinaceae) saplings in two isolated, fragmented populations in southeastern Spain. For this, we monitored herbivory on saplings with regard to the microhabitat in which they grew. We distinguished pines growing in open interspaces, on the edge of shrubs and within the canopy of
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Yager, Lisa Y., Deborah L. Miller, and Jeanne Jones. "Woody Shrubs as a Barrier to Invasion by Cogongrass (Imperata cylindrica)." Invasive Plant Science and Management 4, no. 2 (2011): 207–11. http://dx.doi.org/10.1614/ipsm-d-10-00052.1.

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AbstractCogongrass invades forests through rhizomatous growth and wind-dispersed seeds. Increased density and abundance of woody vegetation along forest edges may strengthen biotic resistance to invasion by creating a vegetative barrier to dispersal, growth, or establishment of cogongrass. We evaluated differences in dispersal of cogongrass spikelets experimentally released from road edges into tallgrass-dominated and shrub-encroached longleaf pine forests (Pinus palustris). Average maximum dispersal distances were greater in the pine–tallgrass forest (17.3 m) compared to the pine–shrub forest
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Tyukavina, Olga, Nikolay Neverov, and Alexander Mineev. "Variations in the length of Scots pine (Pinus sylvestris L.) needles under the influence of climatic factors and solar activity in different conditions of northern taiga." Journal of Forest Science 65, No. 8 (2019): 313–20. http://dx.doi.org/10.17221/47/2019-jfs.

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The aim of the study was to assess the influence of climatic factors on the growth of pine needles in different conditions of the water regime of soil. Studies were conducted in lichen pine forests, cowberry pine forests, blueberry pine forests, shrub-sphagnum pine forest and pine on swamp in the Arkhangelsk forestry regions (northern taiga). The needle length is influenced by solar activity (the Wolf number). The effect of solar activity on increasing the needle length is greatest in optimal growing conditions. In northern taiga conditions, air temperature is the main climatic factor affectin
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Lauer, Dwight K., and Glenn R. Glover. "Stand level pine response to occupancy of woody shrub and herbaceous vegetation." Canadian Journal of Forest Research 29, no. 7 (1999): 979–84. http://dx.doi.org/10.1139/x99-068.

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The relationship between age-5 pine height and vegetation cover was estimated for loblolly pine (Pinus taeda L.) and slash pine (Pinus elliottii Engelm.) stands using regression analysis. This paper utilizes results from four locations of a vegetation control study that included herbicide treatments to control woody shrub and herbaceous vegetation. Age-5 average dominant height was predicted from first-year herbaceous cover, untreated first-year shrub cover, and fifth-year shrub cover. Dominant height increased 0.5 m for each decrease of about 30% in either first year herbaceous cover, untreat
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Dissertations / Theses on the topic "Shroud pins"

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Svensson, Jennilie. "Knappnålar som gravmarkörer : En studie av knappnålar påträffade i Bunge kyrka år 1971-1972." Thesis, Uppsala universitet, Institutionen för arkeologi och antik historia, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-274162.

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The purpose of this thesis is to analyse the pins from Bunge church, in order to investigate how what they can tell us about the burials inside the church. During the post medieval and early modern period pins were used to fasten the burial shrouds, and to stabilize the fabric on the inside of the coffin lids. Therefore these pins appear in grave contexts, and thus offer possibilities for interpretation of burials. The pins have been ordered according to the shape of the needlehead. A total of 697 pins have been analysed, amongst which four main pin types have been detected. The next step in t
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Dell'Orfano, Michael E. "Fire Behavior and Fuel Modeling of Flammable Shrub Understories in Northeastern Pine-Oak Forests." Digital WPI, 2004. https://digitalcommons.wpi.edu/etd-theses/1070.

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"This thesis evaluates the effectiveness of BEHAVE: Fire Behavior Prediction and Fuel Modeling System in predicting fire behavior in the Northeastern pine-oak forest. This fuel complex is composed primarily of a litter and huckleberry shrub understory with a pitch pine and oak overstory. Measurements of fuel bed physical characteristics, weather and fire behavior are taken from a series of prescribed burn studies in Cape Cod National Seashore in Massachusetts. Site-specific fuel models are constructed which provide the necessary inputs for fire predictions. Observed spread rates and flame leng
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Shively, Monica Margaret Riegler. "Wisconsin pine-shrub-grassland ecosystems (pine barrens) an ecosystem recovery plan /." 1994. http://catalog.hathitrust.org/api/volumes/oclc/33070931.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1994.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 152-164).
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Pipkin, Ashley. "The Influence of Fire and Other Disturbance on Ericaceous Shrubs in Xeric Pine-Oak Forests of the Appalachian Mountains." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9450.

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Fire suppression in the southern and central Appalachian Mountains has resulted in an alteration to vegetation structure and composition. For this research the dominant species, abundance, density and age structure of the ericaceous shrub layer is characterized on four sites across the southern and central Appalachian Mountains. Fire histories for each of the sites varied, and were determined in previous research using dendroecological techniques. Over 800 ericaceous shrubs were collected, species included Pieris floribunda (Pursh) Bentham & Hooker f., Rhododendron maximum L. and Kalmia lati
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Simard, Suzanne W. "Competition among lodgepole pine seedlings and plant species in a Sitka-alder dominated shrub community in the southern interior of British Columbia /." 1988. http://hdl.handle.net/1957/11107.

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Books on the topic "Shroud pins"

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McDonald, Philip M. Development of a mixed shrub-ponderosa pine community in a natural and treated condition. U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station, 1995.

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2

Stransky, John J. Net community production dynamics in the herb-shrub stratum of a loblolly pine-hardwood forest: Effects of clearcutting and site preparation. U.S. Dept. of Agriculture, Forest Service, Southern Forest Experiment Station, 1986.

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Hall, Frederick C. Variation in shrub and herb cover and production on ungrazed pine and sagebrush sites in eastern Oregon: A 27-year photomonitoring study. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2007.

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4

Pretty Pink Shroud. Severn House Publishers, 1992.

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Ferrars, Elizabeth. The Pretty Pink Shroud. Ulverscroft Large Print, 1990.

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(Narrator), Sheila Mitchell, ed. The Pretty Pink Shroud. ISIS Audio Books, 1996.

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Origgi, Gloria. Reputation. Translated by Stephen Holmes and Noga Arikha. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691196329.001.0001.

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Reputation touches almost everything, guiding our behavior and choices in countless ways. But it is also shrouded in mystery. Why is it so powerful when the criteria by which people and things are defined as good or bad often appear to be arbitrary? Why do we care so much about how others see us that we may even do irrational and harmful things to try to influence their opinion? The author of this book draws on philosophy, social psychology, sociology, economics, literature, and history to offer an illuminating account of an important yet oddly neglected subject. Filled with surprising insight
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Tree and Shrub Gardening for Michigan (Lone Pine Guide). Lone Pine Publishing, 2003.

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Simard, Suzanne W. Competition among lodgepole pine seedlings and plant species in a Sitka-alder dominated shrub community in the southern interior of British Columbia. 1988.

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Swearingen, Kurt A. Competitive relations for soil water in an experiment of soil compaction and organic residues in a young ponderosa pine-mixed shrub community. 1999.

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Book chapters on the topic "Shroud pins"

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Weka, Rebecca, Dauda Bwala, Yinka Adedeji, et al. "Tracing the Domestic Pigs in Africa." In Tracing the Domestic Pig [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95077.

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Pigs are vital to the economy and critical in meeting the ever increasing demand for livestock and livestock products in most parts of the world. Pig is one of the oldest domesticated animals, though their ancestory is still shrouded in controversy due to lack of sufficient archaeological and genetic information. However, most of the breeds are thought to have descended from the Eurasian Wild Boar (Sus scrofa). This chapter will therefore look at the African pig under the following headings: Introduction, origin of pigs – genetic and historical/archaeological evidences, pig breeds in Africa, economic importance of pig production in Africa, marketing of pigs in Africa, herd health management of pigs in Africa, and challenges affecting pig production in Africa.
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Conference papers on the topic "Shroud pins"

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Schriener, Timothy M., and Mohamed S. El-Genk. "Neutronics Optimization of UN Fuel Pin Assemblies for a Sodium-Cooled, Small Modular Reactor." In ASME 2011 Small Modular Reactors Symposium. ASMEDC, 2011. http://dx.doi.org/10.1115/smr2011-6631.

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This paper presents preliminary results of neutronics and thermal-hydraulics design analysis of a sodium cooled, small modular reactor (SMR). The reactor’s nominal thermal power is 150 MWth at sodium inlet and exit temperatures of 630 and 780 K. The reactor core is comprised of three rings of shrouded hexagonal assemblies of 19.8% enriched UN fuel pins and a hexagonal assembly of enriched B4C pins in the central cavity for a coarse reactivity control. The objectives are to provide enough excess reactivity for achieving a refueling cycle &gt; 5 year, maintaining a more even coolant flow in the
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Rizzi, Massimiliano, and Ivan Catton. "An Experimental Study of Pin Fin Heat Sinks and Determination of End Wall Heat Transfer." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47124.

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An experimental study of a pin fin heat sink was carried out in support of the development of heat sink optimization methods requiring more detailed measurements be made. Measurements of heat flux and temperature are used to separately determine heat transfer coefficients for the pins and the base region between the pins. Three pitch to diameter ratios (distance from pin center to pin center measured diagonally) were studied: P/d = 3/1, 9/4, 3/2. Heat generation was accomplished using cartridge heaters inserted into a copper block. The high thermal conductivity of the copper ensured that the s
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Gowreesan, Vamadevan, Armando Guzman, and Wayne Greaves. "Blade Damping Mechanisms and Some Recent Failures." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14007.

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Abstract The rotating blades of a steam turbine perform the important task of converting the thermal energy of the steam into rotating mechanical work or torque. Hence, these blades have to be very robust and they need to be installed properly in the discs of the turbine. Damping mechanisms are used to improve the stiffness of the blades and to minimize the vibrations of the blades. Different types of blade damping mechanisms are used in steam turbines. Shroud bands, lashing or damping wires, pins, tie-bolts and lashing stubs/ snubbers are the most common types of damping mechanisms used in st
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Saxena, Vikrant, Hasan Nasir, and Srinath V. Ekkad. "Effect of Blade Tip Geometry on Tip Flow and Heat Transfer for a Blade in a Low Speed Cascade." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38176.

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A comprehensive investigation of the effect of various tip sealing geometries is presented on the blade tip leakage flow and associated heat transfer of a scaled up HPT turbine blade in a low-speed wind tunnel facility. The linear cascade is made of four blades with the two corner blades acting as guides. The tip section of a HPT first stage rotor blade is used to fabricate the 2-D blade. The wind tunnel accommodates an 116° turn for the blade cascade. The mainstream Reynolds number based on the axial chord length at cascade exit is 4.83 × 105. The upstream wake effect is simulated with a spok
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Dubois, P. K., A. Landry-Blais, R. Gazzah, S. Sivić, V. Brailovski, and M. Picard. "Cooling Performance of Additively Manufactured Pin Fins in Stacked Microchannels for the Inside-Out Ceramic Turbine Shroud-Cooling Ring." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-60100.

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Abstract The Inside-out ceramic turbine (ICT), a novel microturbine rotor architecture, has an air-cooled ring which keeps its composite rotating structural shroud within operating temperature. The cooling ring must achieve a significant radial temperature gradient with a minimal amount of cooling. The cooling ring is made through additive manufacturing, which opens the design space to tailored cooling geometries. Additively manufactured pin fin heat transfer enhancers are explored in this work to assess whether they hold any significant performance benefit over current rectangular cross-secti
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Khan, Waqar, Rick Culham, and Milan Yovanovich. "Performance of Shrouded Pin-Fin Heat Sinks for Electronic Cooling." In 38th AIAA Thermophysics Conference. American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-5071.

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Shyu, Jin-Cherng, and Ying-Hui Lai. "Performance of shrouded pin-fin and plate-fin heat sinks with a concentrated heat source." In 2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). IEEE, 2011. http://dx.doi.org/10.1109/impact.2011.6117270.

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Kosar, Ali, Chih-Jung Kuo, and Yoav Peles. "Hydoroil-Based Micro Pin Fin Heat Sink." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13257.

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An experimental study on thermal-hydraulic performance of de-ionized water over a bank of shrouded NACA 66-021 hydrofoil micro pin fins with wetted perimeter of 1030-μm and chord thickness of 100 μm has been performed. Average heat transfer coefficients have been obtained over effective heat fluxes ranging from 4.0 to 308 W/cm2 and mass velocities from 134 to 6600 kg/m2s. The experimental data is reduced to the Nusselt numbers, Reynolds numbers, total thermal resistances, and friction factors in order to determine the thermal-hydraulic performance of the heat sink. It has been found that prodi
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Shuaib, Abdel Rahman, Fadi Al-Badour, and Nesar Merah. "Friction Stir Seal Welding (FSSW) Tube-Tubesheet Joints Made of Steel." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45550.

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This paper demonstrates the feasibility of successful seal welding process of tube-tubesheet joints using the relatively new friction stir welding (FSW) process. The purpose of the reported study is to develop the process parameters and to test the feasibility of friction stir welding ASTM 179 seamless cold-drawn carbon steel tube into an ASTM A516 Grade 70 tubesheet. All welds were performed in position control on a fully instrumented experimental friction stir welder using a water-cooled tool holder and a shroud for argon shielding gas. A proprietary tungsten-rhenium pin tool with a 1.54 mm
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Kosar, Ali, and Yoav Peles. "Single-Phase Heat Transfer in Mems-Based Pin Fin Heat Sink." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80412.

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An experimental study has been performed on single-phase heat transfer of de-ionized water over a bank of shrouded micro pin fins 243-μm long with hydraulic diameter of 99.5-μm. Heat transfer coefficients and Nusselt numbers have been obtained over effective heat fluxes ranging from 3.8 to 167 W/cm2 and Reynolds numbers from 14 to 112. The results were used to derive the Nusselt numbers and total thermal resistances. It has been found that endwalls effects are significant at low Reynolds numbers and diminish at higher Reynolds numbers.
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Reports on the topic "Shroud pins"

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McDonald, Philip M., and Gary O. Fiddler. Development of a mixed shrub–ponderosa pine community in a natural and treated condition. U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, 1995. http://dx.doi.org/10.2737/psw-rp-224.

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McDonald, Philip M., and Celeste S. Abbott. Vegetation Trends in a 31-Year-Old Ponderosa Pine Plantation: Effect of Different Shrub Densities. U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, 1997. http://dx.doi.org/10.2737/psw-rp-231.

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McDonald, Philip M. Development of a Mixed-Shrub-Planted Ponderosa Pine Communicty on a Poor Site After Site Preparation and Release. U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, 2003. http://dx.doi.org/10.2737/psw-rp-248.

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Stransky, John J., Jimmy C. Huntley, and Wanda J. Risner. Net community production dynamics in the herb-shrub stratum of a loblolly pine-hardwood forest: effects of clearcutting and site preparation. U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1986. http://dx.doi.org/10.2737/so-gtr-61.

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Hall, Frederick C. Variation in shrub and herb cover and production on ungrazed pine and sagebrush sites in eastern Oregon: a 27-year photomonitoring study. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2007. http://dx.doi.org/10.2737/pnw-gtr-704.

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