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Relevant bibliographies by topics / Flax spinning

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Academic literature on the topic 'Flax spinning'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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Journal articles on the topic "Flax spinning"

1

Sun, Ying. "Processing Flax/ Bemberg/ Bamboo Charcoal Fiber Blended Yarn." Advanced Materials Research 332-334 (September 2011): 630–33. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.630.

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In order to obtain the lightweight and high quality flax class knitted fabric, Spins the high-count flax class knitting gauze are solves the question key . This thesis from the Spinning and Selection of raw materials, The teclmology of the high quality blended knitting yarn of flax fiber / bemberg fiber/bamboo charcoal fiber were manufactured by rotor spinning process, is diseussedin ,and through the comparison of different options for the optimization of process parameters the optimization of process parameters.

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Sun, Ying, Shu Zhen Gao, and Ji Fang Zhang. "Modification of the Flax Fiber with Acetylation." Advanced Materials Research 189-193 (February 2011): 1238–41. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1238.

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The effect of acetylation modifying pretreatment of the flax fiber properties was researched．By the acetylation, the property and spinning ability of flax technical fiber have been largely improved．It can be used in cotton system processing to develop superior quality and diversified flax products．In this paper, it uses the orthogonal experiment to modify the flax fiber with acetylating. Through testing the physical mechanical properties of the flax fiber，the influences of the modified condition, such as the caustic soda density，infusion time，acetate density and acetylating time are optimized[1]. So that the fiber can be modified to improve spinning performance to meet high-production high-end linen and meet the requirements of thin fabric.

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Wang, Rui, and Yi Ping Ji. "Application of FXL Series High-Speed Gilling Machine on Flax Short Spinning." Advanced Materials Research 298 (July 2011): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.298.113.

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Selection and configuration of equipments in flax short spinning, performances of FXL series gilling machine, and its main parameters during processing were introduced in this paper. Discussion was also made on quality of sliver, machine operation and its deficiencies. Results show FXL series gilling machine could be used to produce flax short spinning generation-change products.

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Foulk, Jonn A., Danny E. Akin, and Roy B. Dodd. "Miniature Spinning Enzyme-Retted Flax Fibers." Journal of Natural Fibers 6, no. 1 (March 6, 2009): 1–13. http://dx.doi.org/10.1080/15440470802700238.

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Rudovsky, Pavel Hikolayevich, Mahammadali Nuraddin Nuriyev, and Ilqar Saleh Recebov. "Preparation of Flax Roving for Spinning in Electro-Chemical Activated Solutions." Fibres and Textiles in Eastern Europe 27, no. 6(138) (December 31, 2019): 34–38. http://dx.doi.org/10.5604/01.3001.0013.4465.

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A number of environmentally hazardous substances are used in the process of flax roving preparation for spinning. An alternative to them can be the use of electrochemical activated aqueous solutions. However, the metastability of such solutions requires time tracking of their properties’ relaxation. This article pre-sents experimental data on the relaxation of relevant solutions that can be used for a well-founded selection of flax roving treatment procedures to ensure a re-quired quality of flax yarn. It has been experimentally proven that the use of ECA solutions for preparing rovings for spinning allows to obtain high quality yarn as well as significantly reduce wastewater pollution and improve the envi-ronmental situation in the places of their emissions.

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Zhang, Xinyue, Rongjia Zhang, Minen Cao, and Tingxuan Yang. "Analysis on the Development Feasibility of a High Quality Antibacterial Medical Material." Insight - Material Science 3, no. 1 (March 20, 2020): 16. http://dx.doi.org/10.18282/ims.v3i1.322.

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<p>The wet process antibacterial yarn and wet process. Knitted fabric of flax are made by using wet spinning technology and knitting manufacturing technology of flax, test the main properties of yarn and fabric, the research progress of the application of flax products in medical textiles was reviewed. This paper mainly analyzes the feasibility of flax wet process, antibacterial yarn and flax wet process and knitted fabric as flax wet process antibacterial medical materials from two aspects of strength and knitted structure.</p>

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Kimmel, Linda B., Eileen K. Boylston, Wilton R. Goynes, Danny E. Akin, Gunnar Henriksson, and Karl-Erik L. Eriksson. "Nontraditionally Retted Flax for Dry Cotton Blend Spinning." Textile Research Journal 71, no. 5 (May 2001): 375–80. http://dx.doi.org/10.1177/004051750107100501.

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Susoeva, Irina V., Tatiana N. Vakhnina, Andrey A. Titunin, and Varvara E. Rumyantseva. "Processing Factors and Properties of Thermal Insulation Boards Made of Plant Fillers." Lesnoy Zhurnal (Forestry Journal), no. 4 (July 5, 2022): 185–97. http://dx.doi.org/10.37482/0536-1036-2022-4-185-197.

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Wood processing soft waste is mainly used in the production of fuel briquettes, irrecoverable (non-recyclable) waste from spinning flax and cotton are incinerated or sent to dump. The development of methods for recycling non-recyclable cellulosic waste through the product manufacturing is relevant, both from the resource conservation perspective, as well as the environmental point of view. The issues of plant waste recycling through the manufacturing of various types of products are widely developed in the Russian and foreign scientific research practice. Researchers deal with the processing of wheat, rice straw, bamboo stalks, and other cellulosic materials. There is a plenty of published information on methods of soft wood waste recycling. However, no research on recycling irrecoverable waste of spinning flax and cotton fibers had been carried out before this paper. We propose to produce thermal insulation boards based on phenol-formaldehyde resol binder using flax and cotton spinning waste and soft wood processing waste. The wet production method used here involves mixing the filler with water, a precipitant solution and a binder. After spinning the material is dried. The paper presents the results of determining the physical and mechanical properties and thermal conductivity coefficient of boards made of plant waste. The research was carried out according to the B-plan of the second order. Adequate regression mathematical models of the dependences of physical and mechanical parameters of the boards on the varying factors of the production process were developed according to the experimental data processing results. Using the developed regression models we built the response surfaces of the composite parameters: the bending strength of the boards, the thickness swelling of the boards after 24 h of exposure in water and the thermal conductivity coefficient. Nomograms of the dependencies of board parameters on the values of varying factors have been developed based on the mathematical models analysis. The nomograms are the basis for the development of practical recommendations for determining the rational values of the parameters of insulation board materials production from irrecoverable waste of spinning flax and cotton and soft wood processing waste.

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Kuznetsova, Natal′ya S., and Anastasiya G. Shutova. "INTRODUCTION OF DIGITAL MANAGEMENT METHODS IN THE TECHNOLOGICAL PROCESSES OF FLAX TOW YARN PRODUCTION." Technologies & Quality 51, no. 1 (April 29, 2021): 22–27. http://dx.doi.org/10.34216/2587-6147-2021-1-51-22-27.

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The ways of automating the process chain in a short spinning system, when producing combed yarn, are described in the article. The degree of automation of all stages of the process chain is the subject of the article. In particular, the introduction of digital control methods, when using an automatic layer forming hopper of the production line (the device is protected by a patent of the Russian Federation), which increases the quality of semi-finished products by reducing long sliver unevenness and, consequently, by aligning the sliver coils by mass; application of the automatic sliver levelling system, which allows to increase the evenness of the formed sliver, on the card; possibility to equip the spinning rotor with breakage sensors and the pneumatic autolevelling system, which allows to increase the productivity and to reduce the down time, increasing the ratio of the useful time of the spinning machine.

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Liu, Shu Qiang, Jin Ming Dai, Hu Sheng Jia, Xu Guang Liu, and Bing She Xu. "Effect of Siro-Spun Processing Parameters on Properties of 55/45 Flax/Cotton Blended Yarn." Advanced Materials Research 331 (September 2011): 502–11. http://dx.doi.org/10.4028/www.scientific.net/amr.331.502.

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Limited studies exist related to the siro-spun spinning of flax ( Linum usitatissimum L.) and cotton (Gossypium hirsutum) blends. The purpose of this study was to determine the influence of various siro-spun processing parameters, including twist factor, space between two rovings and specification of traveler, on yarn qualities, such as yarn hairiness, tenacity and evenness. Results show that both specification of traveler and space between two rovings significantly influenced yarn hairiness and evenness, and heavier traveler and greater space led to decreased hairiness, but bad evenness. Twist factor influenced yarn evenness highly significantly, and smaller twist factor led to worse yarn evenness. Results also indicate the optimum levels of siro-spun process parameters as follows: twist factor αm = 150, space between two rovings 8 mm, traveler Fo 5/0. In relation to the general ring-spinning yarn, the siro-spun spinning yarns had decreased hairiness, little increased tenacity and similar evenness.

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Dissertations / Theses on the topic "Flax spinning"

1

Fitzgerald, Maria Amelia. "Textile production in prehistoric and early medieval Ireland." Thesis, Manchester Metropolitan University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326250.

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Dolan, Alice Claire. "The fabric of life : linen and life cycle in England, 1678-1810." Thesis, University of Hertfordshire, 2016. http://hdl.handle.net/2299/17196.

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'The Fabric of Life: Linen and Life Cycle in England, 1678-1810' is structured around the human life cycle to draw out the social and cultural importance of linen for all ranks of society. Human and object life cycles are juxtaposed in the thesis to analyse co-dependent activities and processes rather than focusing on one facet of daily life. For thousands of years flax was a staple fibre, used for textile production in many parts of the globe. Cotton only overtook linen as the most popular textile in England at home and on the body during the nineteenth century. This thesis examines the preceding century to reveal why linen remained a daily necessity in England between 1678 and 1810, a period which encompassed a series of significant changes in the production, trade and use of linen. Linen was ubiquitous as underwear, sheets, table linens and for logistical purposes therefore it provides a unique insight into the early-modern world; a means of understanding the multifaceted experiences of daily life, of integrating understandings of the body, domestic, social, cultural and commercial activities. This thesis is social history through the lens of linen, reading a society through its interactions with a textile.

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Doki-Thonon, Thomas. "Thermal effects in elastohydrodynamic spinning circular contacts." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00749882.

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This thesis is devoted to the study of spinning contacts located in bearing between the roller-end and the ring flange. The main direction of the lubricant flow may change when the contact is subjected to skew. This complex kinematics influences the contact behaviour. A dual experimental-numerical approach is proposed to study this problem. The Tribogyr test-rig allows the experimentation of the contact at the 1:1 scale. A film thickness measurement method, based on white light interferometry, was developed on Tribogyr. This method allows the measurement of film thickness between 0 and 800 nm with an accuracy of a few nanometres. The measurement of forces in the main flow direction shows similarities with classical rolling-sliding contacts. However, the friction coefficient is globally lower as soon as spin is involved. Transverse forces are of the same order of magnitude as the longitudinal forces. This is due to transverse shearing caused by the spin. A numerical model has been developed for the simulation of these spinning contacts. The finite element model, which is based on a fully-coupled solving strategy, takes into account the temperature calculation and the lubricant non-Newtonian rheology. Its validation with Tribogyr experimental results in terms of film thickness and friction has been conducted. Spin and skew effects induce high shear-thinning and thermal-thinning of the lubricant that lead to a decrease of the film thickness. Under high spinning condition, the lubricant exiting the contact may be re-injected to the contact inlet. Consequently, the heat transfers between the lubricant and the solids in contact are modified. In contact subjected to high skew, a local increase (dimple) of the film thickness may occur. Important skew may also lead to starvation conditions. Many experimental campaigns, coupled with an intensive use of the numerical model, allowed to understand the physical phenomena involved as well as to predict the efficiency, in terms of power losses, of the spinning contacts.

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Nguyen, Minh Tuan. "Contribution à l'optimisation des processus de filature des fibres libériennes." Mulhouse, 1996. http://www.theses.fr/1996MULH0440.

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La régularité de masse linéique (titre) des structures textiles linéaires produites en filature constitue le critère de qualité le plus important. En se basant sur les théories stochastiques classiques de l'étirage en grappes des fibres textiles individualisées, l'auteur a proposé une modélisation originale et très générale applicable à toutes les fibres, individualisées ou agglomérées sous forme de faisceaux fibreux ; cette théorie concerne tout particulièrement les fibres libériennes telles que le jute et le lin qui se présentent toujours sous forme de «faisceaux techniques» dissociables au cours du processus de filature. Les développements théoriques ont été totalement validés par une expérimentation industrielle approfondie réalisée dans le centre d'essais N. Schlumberger, premier constructeur français de matériel de filature. Enfin, la limite de filabilité a été discutée

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Jaroš, Patrik. "Sportovní centrum." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227820.

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The subject of my thesis is the design of new sports center in Hlučín. The sports center has three squash courts, a gym, spinning, two exercise rooms, a sauna and a bowling alley with a bar. The building is a basement, has two floors and is covered by a single casing flat roof. The structural system of brick Porotherm. The proposal respects the sports center city plan Hlučín existing street and buildings. Further emphasizes the layout including wheelchair access, collateral design for the static, architectural, energy conservation, fire safety and safety in use of the object.

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Švačková, Tereza. "Sportovní centrum." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227645.

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Diploma thesis „Sport centre“ is made as a project documentation. The designed building structure is detached on a plane terrain in Lipník nad Bečvou. It has two floors and a basement. This building construction is based on the footings. The load-bearing walls are bricked up by Porotherm blocks. The ceilings are made up of panels Spiroll and PZD. The roof construction is designed as a single-flat. In building is squash, dance hall, gym, spinning, massages, snack bar and bowling with two lanes. Car park is next to the building.

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Fridrich, Michal. "Sportovní centrum s restaurací v Holešově." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265438.

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The diploma thesis called ,,Sports center with restaurant in Holesov” is written in form of implementing project documentation and contains all requirements according to current laws. Proposed object is located on a plot 461/1 in Partyzanska street, Holesov. The object is separate building situated into north part of the plot. The designed building has two floors, no basement and is covered with flat roof. Foundations of the building are design as foundations strips with concrete slabs under column. Vertical carrier system, non-carrier constructions and separating constructions of the building contain ceramic clay block Porotherm. The carrier system is supported by reinforced concrete. Ceiling construction is made of ceiling panels Spiroll. The flat roof contains heat-insulation wedges and roof drains and overflows insurance for drainage. Main walls are covered with contact insulation system and the visual part of facade is made of facade blocks Cembrit Solid mounted to wooden grate which are attached to metal anchors. The object is divided into two main parts with shared entrance. First part is located in the ground floor and is designated for restaurant, bowling centre and back office including kitchen and bar. The other part of the building is designated for sports use. The ground floor contains two squash courts with facilities and first floor is divided into parts prepared for a gym and group lessons like spinning. This separate part has its own changing rooms and toilets with showers. The designed object is barrier-free. There is also a parking with 65 lots for vehicles. Four of them are designated for disabled visitors.

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Pourová, Veronika. "Sportovní centrum v Hradci Králové." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226685.

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Sports center in Hradec Králové. The Sports center area accommodates various sport opportunities such as: squash, fitness area, climbing wall, sauna, massages and a possibility for other activities. The Sports center also includes refreshments – a with summer garden overlooking the grounds. It is two stories high, climbing wall is three stories high and squash is 1,5 m below the ground made with brick system Heluz with flat roof. There is a comfort for the visitors thanks to the air-conditioning in the object.

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Books on the topic "Flax spinning"

1

Linder, Olive. Handspinning flax. Phoenix, AZ: Bizarre Butterfly Pub., 1986.

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Baines, Patricia. Flax Spinning: A Practical Guide for Hand Spinners. (Great Britain): P. Baines, 1995.

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Zinzendorf, Christian. The big book of flax: A compendium of flax facts, art, lore, projects and song. Atglen, Pa: Schiffer Pub., 2011.

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4

Čepaitienė, Auksuolė. Verpimas Lietuvoje: Liaudies kultūros likimas = Spinning in Lithuania : the fate of folk culture. Vilnius: Diemedžio leidykla, 2001.

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Godunov, B. N. Lʹni͡a︡nai͡a︡ nitʹ dlinoĭ v tysi͡a︡cheletii͡a︡. Kostroma: Kostromskoĭ gos. tekhnologicheskiĭ universitet, 1995.

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Jacobson, Mark D. A spinning flat reflector for millimeter-wave radiometry. Boulder, Colo: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Environmental Technology Laboratory, 1994.

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Colonial Flax Spinning Wheel Plans. Unicorn, 1988.

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Marshall, Leslie C. Practical Flax Spinner: Being a Description of the Growth, Manipulation, and Spinning of Flax and Tow. Creative Media Partners, LLC, 2018.

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Marshall, Leslie C. The Practical Flax Spinner: Being a Description of the Growth, Manipulation, and Spinning of Flax and Tow. Franklin Classics, 2018.

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10

Gaustad, Stephenie. The practical spinner's guide: Cotton, flax, hemp. 2014.

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Book chapters on the topic "Flax spinning"

1

Das, Brojeswari, Sreenivasa, Y. C. Radhalakshmi, S. K. Som, and A. T. Bindu. "Development of Flax and Silk Blended Yarn in the Wet Spinning System and Comfort Characterization of Blended Fabrics." In Functional Textiles and Clothing 2023, 265–76. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-9983-5_18.

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Todorov, Ivan T. "Twistor Flag Manifolds and SU(2,2) Orbits." In Conformal Description of Spinning Particles, 21–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82868-3_4.

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Todorov, Ivan T. "The Conformal Group of a Conformally Flat Space Time and Its Twistor Representations." In Conformal Description of Spinning Particles, 5–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82868-3_3.

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Engelhardt, Dieter, and Irmela Bues. "Macroscopic Flux of Spinning Photons in Hot Layers of High Gravity Stars." In White Dwarfs: Advances in Observation and Theory, 229–35. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2020-3_30.

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"FLAX-SPINNING." In The Linen Trade, Ancient and Modern, 699–715. Routledge, 2013. http://dx.doi.org/10.4324/9780203041413-22.

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MacFadyen, Joshua. "Spinning Flax in Mills, Households, and the Canadian State, 1850–1870." In Subsistence under Capitalism, 76–102. McGill-Queen's University Press, 2016. http://dx.doi.org/10.1515/9780773598775-006.

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Taylor, Colleen. "Introduction." In Irish Materialisms, 1–23. Oxford University PressOxford, 2024. http://dx.doi.org/10.1093/oso/9780198894834.003.0001.

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Abstract This book claims that in the absence of written documents, the colonial past can be retrieved, piecemeal, through material objects. Using new materialist theory, I approach eighteenth-century everyday Irish objects as resources of narrativity, as holding, via their unique material processes and properties, stories and ideas that can illustrate the peasant Irish who handled and interacted with them. Coins, flax, spinning wheels, mud, and pigs impacted both imperial and nationalist ways of writing about Ireland and Irish character. Theories accounting for the material roots of metaphoric thought evince how these objects formulated both Irish stereotypes and nationalist ideas of resistance. Together, these five objects broaden and add complexity to our portrait of Irish tenant life in the eighteenth century. This book’s integration of new materialist theory and postcolonial cultural analysis is a previously under-explored interdisciplinary approach; as such, it models and invites further postcolonial new materialisms in other fields.

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"LETTER V. THE SAME.—Condition of women and children working in factories—wages—treatment of infants—immorality—wet flax spinning, its effects on health, &c." In Factory System Illustrated, 48–55. Routledge, 2014. http://dx.doi.org/10.4324/9780203041727-11.

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Conference papers on the topic "Flax spinning"

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Titunin, Andrey, Tat'yana Vahnina, and Irina Susoeva. "THE USE OF THERMAL INSULATION MATERIALS FROM LIGNOCELLULOSE INDUSTRIAL WASTE IN SOLVING THE PROBLEM OF MAINTAINING THE CARBON BALANCE." In Ecological and resource-saving technologies in science and technology. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2022. http://dx.doi.org/10.34220/erstst2021_207-212.

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Soft wood waste is mainly used for fuel purposes. Non-returnable vegetable spinning waste is currently not used in the production of products, disposed of by incineration or disposal to landfill. Emissions of carbon-containing gases are the dominant source of anthropogenic emissions into the atmosphere, which leads to disruption of the natural carbon cycle. The aim of the study is to develop a method for recycling waste spinning flax and cotton fibers and soft wood waste by producing composite thermal insulation material. Physical and mechanical parameters and thermal conductivity coefficient of composites are determined.

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Guo, Zhaosheng, Xin Huo, Xiaoming Zhang, Weishan Chen, and Yu Yao. "Vibration analysis of flex-gimbal system with high spinning velocity." In 2016 Chinese Control and Decision Conference (CCDC). IEEE, 2016. http://dx.doi.org/10.1109/ccdc.2016.7531314.

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Khorasany, Ramin M. H., and Stanley G. Hutton. "On the Frequency Response of an Axisymmetric Non-Flat Spinning Disk." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23708.

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For rotating disks, the effect of axisymmetric runout is of interest. This study examines the frequency characteristics of thin rotating discs subjected to axisymmetric non-flatness. The equations of motion used are based on Von Karman’s plate theory. First, the eigenfunctions of the stationary disk problem corresponding to the stress function and transverse displacement are found. These eigenfunctions produce an equation that can be used in the Gelrkin’s method. The initial nonflatness is assumed to be a linear combination of the eigenfunctions of the transverse displacement of the stationary disk problem. Since the initial non-flatness is assumed to be axisymmetric, only eigenfunctions with no nodal diameters are considered to approximate the initial runout. It is supposed that the disk bending deflection is small compared to disk thickness, so we can ignore the second-order terms in the governing equations corresponding to transverse displacement and stress function. After simplifying and discretizing the governing equations of motion, we can obtain a set of coupled equations of motion which takes the effect of initial axisymmetric runout into account. These equations are then used to study the effect of initial runout on the frequency response of the stationary disk. It is found that the initial runout increases the frequencies of the oscillations of a stationary disk. In the next step, we study the effect of initial non-flatness on the critical speed behavior of a spinning disk.

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Velazquez, A., R. Andrew Swartz, Qingli Dai, and Xiao Sun. "Modeling stability of flap-enabled HAWT blades using spinning finite elements." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by H. Felix Wu, Tzu-Yang Yu, Andrew L. Gyekenyesi, and Peter J. Shull. SPIE, 2014. http://dx.doi.org/10.1117/12.2045135.

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Li, Nailu, and Mark J. Balas. "Aeroelastic Suppression of Wind Turbine Blade Using Trailing-Edge Flap." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3014.

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The variation of aeroelastic system dynamics is treated as the change of time-varying aerodynamic loads along the operation trajectory of a spinning wind turbine. An Adaptive Control scheme is introduced to suppress flutter based on the proposed model. The robustness and effectiveness of Adaptive Control is shown by simulation results. For stability analysis, Adaptive Stability Theorem is proved theoretically by Kalman-Yacubovic Lemma and demonstrated numerically by certain cases.

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Yamada, Takafumi, Mochamad Mamun, and Yoshiaki Nakamura. "Analysis and control of the flow field around spinning flat plate wing." In 39th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-692.

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Yousuf, Louay S., and Dan B. Marghitu. "Dynamic Simulations of a Cam Planar Mechanism With Impacts and Clearance." In ASME 2023 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/imece2023-113227.

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Abstract The dynamic simulation of flat-faced follower, spinning cam, and a slider with different clearances are analyzed at distinctive speeds. There is a concentric joint between the flat-faced follower and connecting rod. The follower impacts with friction the spinning cam at various contact points of the cam profile. The simulation is done using SolidWorks. The cause of the chaotic phenomenon is the impact and clearance. The impact parameters are the sliding contact velocity, kinetic coefficient of friction, contact stiffness, exponent, and coefficient of restitution. The nonlinear analysis of the midpoint of the connecting rod is considered in time delay, global, the local embedding dimensions, and Lyapunov exponent calculations. The system’s motion is examined for different coefficients of restitution and additional clearances of the slider. Phase plane and Poincaré maps are developed for nonlinear analysis.

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Funase, Ryu, Masayuki Sugita, Osamu Mori, Yuichi Tsuda, and Junichiro Kawaguchi. "Modeling of Spinning Solar Sail by Multi Particle Model and Its Application to Attitude Control System." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87821.

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In this paper, the attitude motion and attitude control strategy of spinning solar sail are discussed. As the spinning type solar sail does not have any rigid structure to support its membrane, the impulsive torque by the RCS can introduce oscillatory motion of the membrane. Thus, an “oscillation free” attitude controller is needed, which takes into account the flexibility of the membrane and avoid unnecessary oscillatory motion. First, the dynamics model and numerical model were introduced, and the validity of these models and dominant out-of-plane membrane vibration mode is examined by membrane vibration experiment and comparison between both models. Then, based on the analysis of the dynamics of torque-free motion, it was shown that a spinning solar sail has three oscillation modes of nutation, one of which is equal to the spinning rate of the spacecraft. The dominancy of each nutation mode was analytically and numerically discussed. Then, we discussed the spin axis maneuver control using conventional RCS. It was analytically shown that continual impulsive torque synchronizing the spin rate can excite nutation velocity and that a controller is needed to damp the nutation while controlling the spin axis at the same time. The authors proposed new controller named Flex-RLC and improved one. Their effectiveness was verified by numerical simulations using precise multi-particle numerical model which can express higher order oscillatory motion of the flexible membrane, and it was found that the proposed method can control the attitude of spinning solar sail while drastically reduces the nutation velocity compared with conventional control logic. So, it can be said that the proposed method is promising fast and stable controller for spinning solar sail.

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Öztürk, Ayşegül, and Mehmet C. Ece. "Unsteady Mixed Convection Over Spinning Isothermal Bodies With Blowing and Suction." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1410.

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Abstract Initial development of the laminar thermal boundary-layer flow over an impulsively started translating and spinning axisymmetrical isothermal body with blowing and suction in the case of mixed convection is investigated. Velocity components and temperature are expanded in series in powers of the square root of time. Leading, first and second order functions are obtained analytically and the third, forth and fifth order functions are determined numerically. Application of the general results to a sphere shows that buoyancy driven aiding and opposing flows help surface suction in retarding and surface blowing in facilitating the onset of flow separation respectively. Surface heat flux is increased near the front stagnation point due to the axial inflow created by the body spin and enhanced by the circulating flow inside the separated region. Surface suction is found to increase the heat transfer while the surface blowing decreases it. Aiding and opposing flows increase the surface heat flux around the front and rear stagnation points respectively.

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Solano, J. P., G. Paniagua, and A. de la Loma. "Novel 2D Transient Heat Conduction Calculation in a Cooled Rotor: Ventilation Preheating — Blowdown Flux." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51308.

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An alternative to classical data reduction techniques for thin film gauges in short duration facilities is presented. A finite element model of the two-dimensional unsteady heat conduction equation is solved in the cross-sectional area of a metallic airfoil bounded with a polyamide sheet, on which thermal sensors are deposited. As a result, the transient temperature field in the multilayered substrate and the experimental wall heat flux distribution are derived. The methodology allows for capuring all 2D heat conduction effects that are irremediably neglected with the 1D data reduction technique. The application of this technique in a compression tube facility allows an exact evaluation of the initial wall heat flux into cooled rotor blades. During the spinning up period, the rotor of this type of fully rotating transient facilities is spun up to nearly its nominal speed (from 0 RPM to 6200 RPM) resulting in preheating due to drag losses. The long duration of this experiment (∼450 s) and the magnitude of the wall temperature increase result in significant 2D conduction effects that are not accounted for using the 1D approach. In addition, short duration experiments confirm the existence of 2D effects at smaller time scales (∼0.5 s), as well as the influence of the initial non-uniform temperature distribution in the rotor blade. The resulting flux with such an initial condition appears to be the superposition of the wall heat flux at the end of the spinning up before the test and the flux due to the blow-down itself.

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