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Journal articles on the topic 'Long cylinder'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

DE LANGRE, E., M. P. PAÏDOUSSIS, O. DOARÉ, and Y. MODARRES-SADEGHI. "Flutter of long flexible cylinders in axial flow." Journal of Fluid Mechanics 571 (January 4, 2007): 371–89. http://dx.doi.org/10.1017/s002211200600317x.

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We consider the stability of a thin flexible cylinder considered as a beam, when subjected to axial flow and fixed at the upstream end only. A linear stability analysis of transverse motion aims at determining the risk of flutter as a function of the governing control parameters such as the flow velocity or the length of the cylinder. Stability is analysed applying a finite-difference scheme in space to the equation of motion expressed in the frequency domain. It is found that, contrary to previous predictions based on simplified theories, flutter may exist for very long cylinders, provided th

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2

TUTTY, O. R. "Flow along a long thin cylinder." Journal of Fluid Mechanics 602 (April 25, 2008): 1–37. http://dx.doi.org/10.1017/s0022112008000542.

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Two different approaches have been used to calculate turbulent flow along a long thin cylinder where the flow is aligned with the cylinder. A boundary-layer code is used to predict the mean flow for very long cylinders (length to radius ratio of up to O(106)), with the effects of the turbulence estimated through a turbulence model. Detailed comparison with experimental results shows that the mean properties of the flow are predicted within experimental accuracy. The boundary-layer model predicts that, sufficiently far downstream, the surface shear stress will be (almost) constant. This is cons

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3

Agbaglah, G., and C. Mavriplis. "Three-dimensional wakes behind cylinders of square and circular cross-section: early and long-time dynamics." Journal of Fluid Mechanics 870 (May 10, 2019): 419–32. http://dx.doi.org/10.1017/jfm.2019.265.

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The flow in the near wake of a square cylinder at Reynolds numbers of 205 and 225, corresponding to three-dimensional wake instability modes $A$ and $B$, respectively, and that of the square’s circumscribed circular cylinder are examined by using three-dimensional Navier–Stokes numerical simulations. At small times, prior to the streamwise vortex shedding, a self-similar velocity is observed in the wake and no significant difference is observed in the dynamics of the flows past the square and the circular cylinders. The exponential growth of the three-dimensional instability reaches a saturati

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4

Chang, Shuqi, Luoning Zhang, Zhimeng Zhang, and Chunning Ji. "Dynamics and Wake Interference Mechanism of Long Flexible Circular Cylinders in Side-by-Side Arrangements." Energies 17, no. 11 (2024): 2741. http://dx.doi.org/10.3390/en17112741.

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The vortex-induced vibrations of two side-by-side flexible cylinders in a uniform flow were studied using a three-dimensional direct numerical simulation at Reynolds number Re = 350 with an aspect ratio of 100, and a center-to-center spacing ratio of 2.5. A mixture of standing-traveling wave pattern was induced in the in-line (IL) vibration, while the cross-flow (CF) vibration displayed a standing-wave characteristic. The ninth vibration mode prominently occurred in both IL and CF directions, along with competition between multiple modes. Proximity effects from the neighboring cylinder caused

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5

Xiao, Zhi Quan. "Modeling Study of Long-Stroke Valve-Controlled Asymmetrical Cylinder." Applied Mechanics and Materials 52-54 (March 2011): 291–96. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.291.

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With the consideration of compressibility flow and the redefined load flow and load pressure, the mathematical model of long-stroke valve-controlled asymmetrical cylinder system is presented. The equivalent volume functions, the functions of equivalent volume functions of cylinder's two chambers are introduced, which reflects the influence of piston's positions in its long stroke on the dynamic performance of valve-controlled cylinder. Simulation results show that there exists obvious differences between forward and backward directions of long-stroke valve-controlled asymmetrical cylinder syst

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6

Al-Had, Istabraq Hassan Abed, Farag Mahel Mohammed, and Jamal A.-K. Mohammed. "Modeling and simulation of electro-hydraulic telescopic elevator system controlled by programmable logic controller." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 1 (2022): 71–78. https://doi.org/10.11591/ijeecs.v27.i1.pp71-78.

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Traditional hydraulic cylinders are widely used in industry as load lifting tools. There is difficulty in employing these cylinders in narrow installation space like building elevators as well as they require a long working stroke, so solving this problem requires using the telescopic hydraulic cylinder instead. This cylinder is a unique hydraulic cylinder design that uses a sequence of decreasing diameters to create a long operating stroke in a compact-retracted form. In this work, the Auto Station software is used to build a telescopic hydraulic cylinder model that includes hydraulic element

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7

Cho, H. H., M. Y. Jabbari, and R. J. Goldstein. "Mass Transfer With Flow Through an Array of Rectangular Cylinders." Journal of Heat Transfer 116, no. 4 (1994): 904–11. http://dx.doi.org/10.1115/1.2911465.

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The mass transfer from an array of naphthalene-coated parallel rectangular cylinders, through which air passes in a slitlike flow, has been measured. The local Sherwood numbers indicate that the flow pattern is asymmetric in spite of using an array of two-dimensional, equally spaced identical cylinders. Smoke-wire flow visualization verifies this asymmetry, showing alternate short and long wakes around the cylinders, due probably to the instability of vortex shedding. On the side surfaces of the cylinders with the short wakes, the airflow deflects and reattaches, resulting in a high mass trans

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8

Al-Had, Istabraq Hassan Abed, Farag Mahel Mohammed, and Jamal A. K. Mohammed. "Modeling and simulation of electro-hydraulic telescopic elevator system controlled by programmable logic controller." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 1 (2022): 71. http://dx.doi.org/10.11591/ijeecs.v27.i1.pp71-78.

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Traditional hydraulic <span>cylinders are widely used in industry as load lifting tools. There is difficulty in employing these cylinders in narrow installation space like building elevators as well as they require a long working stroke, so solving this problem requires using the telescopic hydraulic cylinder instead. This cylinder is a unique hydraulic cylinder design that uses a sequence of decreasing diameters to create a long operating stroke in a compact-retracted form. In this work, the Auto Station software is used to build a telescopic hydraulic cylinder model that includes hydra

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9

Dai, Hong-Liang, and Yan-Ni Rao. "Nonlinear dynamic behavior of a long temperature-dependent FGM hollow cylinder subjected to thermal shocking." Science and Engineering of Composite Materials 21, no. 2 (2014): 267–80. http://dx.doi.org/10.1515/secm-2012-0072.

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AbstractIn this paper, the nonlinear dynamic behavior of a long hollow cylinder consisting of temperature-dependent functionally graded material (FGM) subjected to thermal shocking is investigated. Material parameters of the FGM hollow cylinder, except the Poisson’s ratio, are assumed to be graded continuously through the thickness according to the power law expressions, and they are assumed to be temperature dependent. The governing equation of the motion of the FGM hollow cylinder is obtained based on the plane-stain theory and together with the governing equation of the transient heat trans

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10

Cheng, W., I. Finnie, and O¨ Vardar. "Estimation of Axisymmetric Residual Stresses in a Long Cylinder." Journal of Engineering Materials and Technology 114, no. 2 (1992): 137–40. http://dx.doi.org/10.1115/1.2904152.

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An approach based on linear elastic equations is developed to predict axisymmetric axial and radial residual stresses in a long cylinder in plane strain from hoop stresses measured in both plane strain and plane stress. This approach, when combined with the authors’ crack compliance method for residual stress measurement, leads to a simplified experimental procedure for measurement of axisymmetric residual stresses in cylinders.

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11

Bansal, Savita, and Satya Bir Singh. "Creep Analysis of Thick Walled Cylinder under Constant Internal Pressure." Materials Science Forum 1074 (November 8, 2022): 89–106. http://dx.doi.org/10.4028/p-904ahp.

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In this work, the creep analysis of thick-walled rotating cylinder made of Aluminum Silicon Carbide under internal pressure has been investigated taking some assumptions, viz. no change in the volume of the cylinder, cylinder material is anisotropic, principal axes coincides with the axes of anisotropy, effective stress is dependent upon effective strain rate, and there is zero strain in the axial direction (Z direction in polar coordinate). Sherby’s law has been used to calculate the creep rate. After finding the formulas for radial, tangential and axial stresses for anisotropic cylinder, the

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12

Zhao, Yu, and M. Keith Sharp. "Stability of Elliptical Cylinders in Two-Dimensional Channel Flow." Journal of Biomechanical Engineering 122, no. 5 (2000): 493–97. http://dx.doi.org/10.1115/1.1289990.

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The flow around rigid cylinders of elliptical cross section placed transverse to Poiseuille flow between parallel plates was simulated to investigate issues related to the tumbling of red blood cells and other particles of moderate aspect ratio in the similar flow in a Field Flow Fractionation (FFF) channel. The torque and transverse force on the cylinder were calculated with the cylinder freely translating, but prevented from rotating, in the flow. The aspect ratios (long axis to short axis) of the elliptical cylinders were 2, 3, 4, and 5. The cylinder was placed transversely at locations of

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13

Rammerstorfer, F. G., and F. D. Fischer. "A Method for the Experimental Determination of Residual Stresses in Axisymmetric Composite Cylinders." Journal of Engineering Materials and Technology 114, no. 1 (1992): 90–96. http://dx.doi.org/10.1115/1.2904148.

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An analytical procedure applicable for the experimental determination of initially existing residual stresses in long composite circular cylinders is derived within the framework of the drilling and turning technique. The method is demonstrated for a long cylinder composed of two different materials. An extension to cylinders composed of an arbitrary number of circular cylindrical layers can easily be derived in analogy to the described procedures.

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14

Ozturk, Ali, and Mufit Gulgec. "Determination of Onset of Yield due to Material Properties in a Heat Generating Two-Layered Compound Cylinder." Applied Mechanics and Materials 325-326 (June 2013): 22–27. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.22.

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In this theoretical study, based on Trescas yield criterion and its associated flow rule, the elastic deformation of a centrally heated compound cylinder with fixed ends is investigated analytically by taking into consideration not only the geometrical but also the material parameters such as yield strength, modulus of elasticity, Poissons ratio, thermal conductivity and coefficient of thermal expansion. These material parameters are assumed to be independent of the temperature. The compound cylinder is assumed to be very long such that axisymmetric condition exists. Both of the constituent ma

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15

Wang, Hua Geng. "The Cutter Head Drive Theoretical Model of a New Multi Dual-Eccentric Axes Tunneling Shield Driven by Hydraulic Cylinders Directly." Applied Mechanics and Materials 741 (March 2015): 586–93. http://dx.doi.org/10.4028/www.scientific.net/amm.741.586.

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Based on work principle analysis of a new multi dual-eccentric axes tunneling shield, the advantages of adapting well to large diameter long distance tunnel and energy saving are showed in detail. Then, the cutter head drive theoretical model driven by a single hydraulic cylinder is analyzed, the expressions of driving force and hydraulic cylinder flow are set up, they all vary with the position changing of the cutter head. On this basis, the multi cylinders drive theoretical model is obtained by superposing the expressions of each cylinder. Subsequently, the relationships between working pres

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16

Bedlaoui, Allal, and Hamid Boutoutaou. "Effect of form defect on pipe surfaces subjected to pressure at the assembly point." Advances in Mechanical Engineering 14, no. 7 (2022): 168781322211097. http://dx.doi.org/10.1177/16878132221109722.

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Shrink-fit assemblies have been used to offer a more robust running surface for wooden wheels for a long time. Generally, the two parts are cylindrical or conical. Shrink-fit is now an operation that involves creating contact between two cylinders, there is no third party, and this is good economically. It’s employed in a variety of industries, including automotive, aerospace, oil and gas, and train wheels. To do this operation, the inner cylinder’s outer radius must be greater than the outer cylinder’s inner radius, that difference between them is called “interference,” the latter is being im

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17

Chang, Wen-Yi, George Constantinescu, and Whey Fone Tsai. "On the flow and coherent structures generated by a circular array of rigid emerged cylinders placed in an open channel with flat and deformed bed." Journal of Fluid Mechanics 831 (October 13, 2017): 1–40. http://dx.doi.org/10.1017/jfm.2017.558.

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The flow and the turbulence structure generated by a circular porous cylinder of diameter $D$ containing solid cylinders of diameter $d$ placed in an open channel of depth $h\approx 0.5D$ are investigated using eddy-resolving simulations which resolve the wakes past the individual solid cylinders in the array. The solid cylinders extend from the bed through the water surface. This geometrical set-up is directly relevant to understand the physics of flow past an emerged patch of aquatic vegetation developing in a river channel or over its floodplain. Simulations are conducted with different sol

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18

Dhirender*, Jangra Vikas, and Kumar Garg Sandeep. "ANALYSIS OF VARIOUS DEFECTS DURING ELECTROMECHANICAL ENGRAVING OF GRAVURE CYLINDER." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 4 (2016): 236–39. https://doi.org/10.5281/zenodo.48931.

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Gravure printing process is chosen to meet high quality, long run jobs and end user expectations. This printing process is known for its versatility and print fidelity. Electromechanical engraving is one of the prominent methods of cylinder preparation. But due to complex combination of process parameters the occurrence of defects is inevitable while cylinder preparation. The presence of these defects consequences in degradation of quality which leads to rejection of cylinder. The occurrence of these problems is unavoidable but nevertheless it can be controlled and minimized by optimization of

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19

Mursaline, Miad Al, Timothy K. Stanton, Andone C. Lavery, and Erin M. Fischell. "Acoustic scattering by smooth elastic cylinders insonified by directional transceivers: Monostatic theory and experiments." Journal of the Acoustical Society of America 154, no. 1 (2023): 307–22. http://dx.doi.org/10.1121/10.0019716.

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A theoretical model for predicting the acoustic field scattered by an elastic cylinder that is partially insonified by a directional transceiver is proposed in the form of a simple approximate one-dimensional integral. This model accounts for spherical spreading and directivity of the incident waves and extends the formulation used in a preceding article [Gurley and Stanton, J. Acoust. Soc. Am. 94, 2746–2755 (1993)] by including effects due to oblique insonification of a long cylinder assuming negligible end-contributions. The scattered field of an infinitely long cylinder for obliquely incide

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20

Raheem, Omer A., Senthooran Kalidoss, Hector Alejandro Pomar, Alfredo Suarez-Sarmiento Jr, and Paul Perito. "Double distal corporal anchoring stitch for lateral penile implant cylinder extrusion." Journal of Sexual Medicine 21, no. 10 (2024): 967–70. http://dx.doi.org/10.1093/jsxmed/qdae100.

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Abstract Background The ventral and distal aspects of the corpora cavernosa are the thinnest, increasing the likelihood of cylinder extrusion or crossover complications pertaining to inflatable penile prosthesis procedures. A double distal corporal anchoring double stitch can be used to robustly secure impending lateral extrusions and crossovers of implant cylinders. It is a novel, effective corrective measure for the uncommon complication of migrated cylinders in inflatable penile prosthesis placement. Aim To describe the surgical indications and technique for the double distal corporal ancho

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21

Mambetaliev, K. R. "Improving the methods of storing weapons and military equipment in the Ground Forces of the Armed Forces of the Republic of Kazakhstan." Proceeding "Bulletin MILF" 57, no. 1 (2024): 35–41. http://dx.doi.org/10.56132/2791-3368.2024.1-49-04.

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The article considers the practical component of a scientific study aimed at improving the process of controlling the flushing of cylinders of long-term military equipment by automating it. During internal preservation, storage and removal of engine cylinders from preservation, the main component of the installation for flushing the cylinder piston group of gasoline and diesel engines opens.

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22

Han, Fengbo. "Cellular Automata Modeling of Ostwald Ripening and Rayleigh Instability." Materials 11, no. 10 (2018): 1936. http://dx.doi.org/10.3390/ma11101936.

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A cellular automata (CA) approach to modeling both Ostwald ripening and Rayleigh instability was developed. Curvature-driven phase interface migration was implemented to CA model, and novel CA rules were introduced to ensure the conservation of phase volume fraction of nearly equilibrium two-phase system. For transient Ostwald ripening, it is shown that the temporal growth exponent m is evolving with time and non-integer temporal exponents between 2 and 3 are predicted. The varying temporal growth exponent m is related to the particle size distributions (PSDs) evolution. With an initial wide P

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23

KAGEMOTO, H., M. MURAI, M. SAITO, B. MOLIN, and š. MALENICA. "Experimental and theoretical analysis of the wave decay along a long array of vertical cylinders." Journal of Fluid Mechanics 456 (April 10, 2002): 113–35. http://dx.doi.org/10.1017/s0022112001007480.

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A row of fifty identical, truncated vertical cylinders is submitted to regular head waves, with wave periods in a narrow range around the period of the so-called Neumann trapped mode. The free-surface elevation is measured at 14 locations along the array. Response amplitude operators of the free-surface motion are compared with numerical predictions from a potential flow model. Resonance effects, at wave periods equal to or larger than the critical one, are found to be much less than given by the numerical model. It is advocated that these discrepancies are due to dissipative effects taking pl

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24

Abouelregal, Ahmed E., and Meshari Alesemi. "Fractional Moore-Gibson-Thompson heat transfer model with nonlocal and nonsingular kernels of a rotating viscoelastic annular cylinder with changeable thermal properties." PLOS ONE 17, no. 6 (2022): e0269862. http://dx.doi.org/10.1371/journal.pone.0269862.

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Long hollow cylinders are commonly utilized in various technological applications, including liquid and gas transmission. As a result, its value is growing, becoming increasingly important to many research efforts. Compared with thermal isotropic homogeneous cylinders, thermo-viscoelastic orthotropic cylinders have less relevant data. In this paper, a thermoelastic fractional heat conduction model was developed based on the Moore-Gibson-Thompson equation to examine the axial symmetry problem of a viscoelastic orthotropic hollow cylinder. Atangana and Baleanu derivative operators with nonsingul

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25

Heinrich, Lothar, and Malte Spiess. "Central Limit Theorems for Volume and Surface Content of Stationary Poisson Cylinder Processes in Expanding Domains." Advances in Applied Probability 45, no. 2 (2013): 312–31. http://dx.doi.org/10.1239/aap/1370870120.

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A stationary Poisson cylinder process in the d-dimensional Euclidean space is composed of a stationary Poisson process of k-flats (0 ≤ k ≤ d−1) which are dilated by independent and identically distributed random compact cylinder bases taken from the corresponding (d−k)-dimensional orthogonal complement. If the second moment of the (d−k)-volume of the typical cylinder base exists, we prove asymptotic normality of the d-volume of the union set of Poisson cylinders that covers an expanding star-shaped domain ϱ W as ϱ grows unboundedly. Due to the long-range dependencies within the union set of cy

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26

Heinrich, Lothar, and Malte Spiess. "Central Limit Theorems for Volume and Surface Content of Stationary Poisson Cylinder Processes in Expanding Domains." Advances in Applied Probability 45, no. 02 (2013): 312–31. http://dx.doi.org/10.1017/s0001867800006340.

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A stationary Poisson cylinder process in the d-dimensional Euclidean space is composed of a stationary Poisson process of k-flats (0 ≤ k ≤ d−1) which are dilated by independent and identically distributed random compact cylinder bases taken from the corresponding (d−k)-dimensional orthogonal complement. If the second moment of the (d−k)-volume of the typical cylinder base exists, we prove asymptotic normality of the d-volume of the union set of Poisson cylinders that covers an expanding star-shaped domain ϱ W as ϱ grows unboundedly. Due to the long-range dependencies within the union set of cy

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27

Suvolapov, Volodumur, Andriy Novitskiy, Vasul Khmelevski, and Oleksandr Bustruy. "Investigation of the Heat Transfer Process in Internal Combustion Engine Cylinders." Central Ukrainian Scientific Bulletin. Technical Sciences, no. 3(34) (October 2020): 266–74. http://dx.doi.org/10.32515/2664-262x.2020.3(34).266-274.

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The article analyzes scientific publications and literary studies of heat transfer processes in cylinders of internal combustion engines. The research of temperature fields in engines during their operation at different modes with the use of a software package and calculation module is presented. The results of modeling and thermo-metering in homogeneous and laminated engine cylinder liners are analyzed. Graphic dependencies and temperature distribution by cylinder wall thickness at maximum and minimum temperature on cylinder surface are given. On the basis of researches it is established that

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28

Bai, Chuan Dong, Yan Wang, and De Yi Wang. "Research on a New Model for Accelerated Life Test of Pneumatic Cylinders." Applied Mechanics and Materials 40-41 (November 2010): 760–65. http://dx.doi.org/10.4028/www.scientific.net/amm.40-41.760.

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Pneumatic cylinders, as a long lifetime product, are used continuously under normal conditions. So Accelerated Life Testing is an important tool to get information quickly on lifetime which is achieved by subjecting the test cylinders to conditions that are more severe than the normal ones. This paper firstly analyze the failure mechanism of pneumatic cylinder, then based on the General Log-Linear relationship and Weibull distribution, describes a model for multiple stress-type accelerated life data analysis. The paper gives the parameter statistical method of the mode by using likelihood theo

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29

Zalgaller, V. A. "Some bendings of a long cylinder." Journal of Mathematical Sciences 100, no. 3 (2000): 2228–38. http://dx.doi.org/10.1007/s10958-000-0007-3.

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30

Ghosh, A. K. "Axisymmetric vibration of a long cylinder." Journal of Sound and Vibration 186, no. 5 (1995): 711–21. http://dx.doi.org/10.1006/jsvi.1995.0484.

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31

VOORHEES, A., P. DONG, P. ATSAVAPRANEE, H. BENAROYA, and T. WEI. "Beating of a circular cylinder mounted as an inverted pendulum." Journal of Fluid Mechanics 610 (August 8, 2008): 217–47. http://dx.doi.org/10.1017/s0022112008002383.

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This paper contains temporally and spatially resolved flow visualization and DPIV measurements characterizing the frequency–amplitude response and three-dimensional vortex structure of a circular cylinder mounted like an inverted pendulum. Two circular cylinders were examined in this investigation. Both were 2.54 cm in diameter and ~140 cm long with low mass ratios, m* = 0.65 and 1.90, and mass–damping ratios, m*ζ = 0.038 and 0.103, respectively. Frequency–amplitude response analysis was done with the lighter cylinder while detailed wake structure visualization and measurements were done using

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32

Littlefield, D. L. "Magnetomechanical Instabilities in Elastic-Plastic Cylinders, Part I: Elastic Response." Journal of Applied Mechanics 63, no. 3 (1996): 734–41. http://dx.doi.org/10.1115/1.2823357.

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The effects of electromagnetic fields on instabilities in metal cylinders are considered in this analysis. The cylinder is assumed to be infinitely long and perfectly conducting. An axial electric current is introduced in the cylinder, giving rise to an azimuthal magnetic field in the surrounding vacuum, causing mechanical distortion in the cylinder. The current is assumed to be small so that the deformation remains elastic; in an accompanying paper (Littlefield, 1996) larger currents are considered where plastic flow becomes important. After solutions to the idealized motion of the cylinder u

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33

Akhmedov, Sh R., B. S. Rakhmonov, I. M. Karimov, A. M. Marasulov, and Sh I. Zhuraev. "Exposure to acoustic waves on viscoelastic cylinder." E3S Web of Conferences 401 (2023): 05024. http://dx.doi.org/10.1051/e3sconf/202340105024.

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The problem of the impact of acoustic waves in a homogeneous viscoelastic cylinder is considered. The investigation aims to investigate the diffraction of acoustic harmonic waves in a viscoelastic cylinder. The body is assumed to be in an infinite acoustic space filled with an ideal fluid. Numerical calculations of the angular and frequency characteristics of the scattered field for viscoelastic cylinders under the action of harmonic acoustic waves are carried out. In the case of steady waves, the Helmholtz equation describes the propagation of small disturbances in an acoustic medium. And in

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34

Богач, В. М., Ю. М. Довіденко, and О. П. Дуранов. "FEATURES OF THE WORK OF LUBRICATION SYSTEMS SHIP'S LONG-STROKE ENGINES." SHIP POWER PLANTS 44, no. 1 (2022): 53–63. http://dx.doi.org/10.31653/smf44.2022.53-63.

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The publication is devoted the decision of an actual problem increase efficiency operation of ship diesel engines by perfection processes greasing of cylinders. The outcomes bench and service tests of existing systems of lubrication of barrels of ship long-stroke diesel engines аre submitted. The main lacks of process of motion of oil in a system are established, and the characteristics of this process are determined. Keywords: ship diesel engine, greasing system, greasing channel, greasing process, cylinder, piston, a piston ring.

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Zhu, Wen Dong, Xu Dong Pan, Ye Li, and Wei Jie Huo. "Design of Hydraulic Locking Mechanism Based on Material Friction." Key Engineering Materials 667 (October 2015): 481–86. http://dx.doi.org/10.4028/www.scientific.net/kem.667.481.

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Hydraulic cylinders are the actuators used in driving and bearing heavy loads. In normal conditions, it is required to bear load steadily for long time. Due to the inevitable internal leakage of traditional hydraulic cylinder, the strict conditions of the applications are always hard to meet. The materials selecting of cylinder and lock sleeve is very important on a new type of locking mechanism. This paper presents the design of hydraulic locking mechanism based on material friction properties. The strength, elasticity, temperature coefficient, and the factors such as friction coefficient are

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36

Ueda, Y., T. Kida, and M. Iguchi. "Steady approach of unsteady low-Reynolds-number flow past two rotating circular cylinders." Journal of Fluid Mechanics 736 (November 7, 2013): 414–43. http://dx.doi.org/10.1017/jfm.2013.503.

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AbstractThe long-time viscous flow about two identical rotating circular cylinders in a side-by-side arrangement is investigated using an adaptive numerical scheme based on the vortex method. The Stokes solution of the steady flow about the two-cylinder cluster produces a uniform stream in the far field, which is the so-called Jeffery’s paradox. The present work first addresses the validation of the vortex method for a low-Reynolds-number computation. The unsteady flow past an abruptly started purely rotating circular cylinder is therefore computed and compared with an exact solution to the Na

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Hayashi, Kenjirou, and Toshiyuki Shigemura. "UNSTEADY FLOW AROUND A VERTICAL CIRCULAR CYLINDER IN A WAVE." Coastal Engineering Proceedings 1, no. 21 (1988): 68. http://dx.doi.org/10.9753/icce.v21.68.

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The unsteady characteristics of flow around a vertical circular cylinder in a typical wave, under which the lift force acting on it is very stable and has a frequency which is twice that of the incident wave, have been investigated experimentally. The relationship between the fluctuating flow velocities near the boundary layer separation points and the lift force acting on a sectional part of the cylinder has been understood quantitatively. To clarify the region where the appearance of stable lift force occurs, the long time records of lift forces acting on vertical cylinders in waves are also

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38

Yao, Yan Sheng, Ke Ren Zhang, Zhen Yu, and Tao Mei. "Research on a New Frictionless Air Cylinder." Advanced Materials Research 308-310 (August 2011): 859–63. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.859.

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The definition, status and development of frictionless air cylinder are presented. As design guidance, leakage model of long piston cylinder during starting action stage is built. It shows influences of clearance, length of piston and other parameters on seal ability. Leakage model of another piston with two rows of small pores is introduced and studied. In those structures the number and diameter of holes as well as clearance of piston-cylinder are key factors of leakage. Based on above models and principles, a new type of air bearing piston with pores, pressure distribution groove and seal g

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Xie, H., H. L. Dai, and Y. N. Rao. "Thermoelastic Dynamic Behaviors of a FGM Hollow Cylinder Under Non-Axisymmetric Thermo-Mechanical Loads." Journal of Mechanics 29, no. 1 (2012): 109–20. http://dx.doi.org/10.1017/jmech.2012.112.

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AbstractThis paper is concerned with two-dimensional (r, θ) thermoelastic dynamic responses of a long functionally graded hollow cylinder subjected to asysmmetrical thermal and mechanical loads. The material properties, except the Poisson's ratio, are assumed to be temperature independent and vary exponentially and continuously in the radial direction. By means of finite difference method and Newmark method, the motion governing equations of the long FGM hollow cylinder are solved. Comparisons between this paper's results and the corresponding analytical results validate the proposed solution.

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ROSENBERG, M., R. L. MERLINO, and P. K. SHUKLA. "On the possibility of refraction of dust acoustic waves." Journal of Plasma Physics 77, no. 2 (2010): 231–36. http://dx.doi.org/10.1017/s0022377810000140.

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AbstractWe theoretically investigate conditions for the refraction of long-wavelength dust acoustic waves by arrays of periodic cylinders in a dusty plasma. This is based on a recent analysis of the refraction of shallow water waves by periodic cylinder arrays (Hu and Chan, Phys. Rev. Lett.95 (2005), 154501). In the dusty plasma case, however, the boundary conditions involve the formation of voids around the cylinders. Possible experimental conditions are discussed.

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Lin, X., F. Spettel, and S. Scavarda. "Modeling and Test of an Electropneumatic Servovalve Controlled Long Rodless Actuator." Journal of Dynamic Systems, Measurement, and Control 118, no. 3 (1996): 457–62. http://dx.doi.org/10.1115/1.2801167.

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The usual way of modeling an electropneumatic servodrive system consists of supposing the homogeneity of the flow parameters in the cylinder. In order to study the influence of the transmission line effects on the dynamic behavior of a long pneumatic rodless cylinder, a generalized one-dimensional distributed parameter cylinder model is presented. The proposed numerical scheme combining the finite difference and the “characteristics” method enables the simulate of a long rodless cylinder by taking into account the servovalve boundary conditions and the piston movement. The simulated results ar

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Jin, Ruijia, Xu Zhao, Ye Liu, and Baolei Geng. "Large Scale Experimental Study on Waves and Submerged Horizontal Cylinders." Water 16, no. 1 (2023): 28. http://dx.doi.org/10.3390/w16010028.

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A large-scale physical model experiment was conducted to study the interaction between regular waves and submerged horizontal cylinders, breaking through the bottleneck of a low Reynolds number in a traditional small water tank. The surface pressure distribution and overall force of submerged horizontal cylinders at different submerged depths in waves with different heights and periods under a high Reynolds number were analyzed, and the variation in first- and second-order wave forces with wave height periods was analyzed. Subsequently, the influence of the cylinder on the wave field was analy

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Jin, Y., and L. P. Chamorro. "Passive pitching of splitters in the trailing edge of elliptic cylinders." Journal of Fluid Mechanics 826 (August 3, 2017): 363–75. http://dx.doi.org/10.1017/jfm.2017.456.

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The distinctive pitching of hinged splitters in the trailing edge of elliptic cylinders was experimentally studied at various angles of attack ($AoA$) of the cylinder, Reynolds numbers, splitter lengths, aspect ratios ($AR$) of the cylinder and freestream turbulence levels. High-resolution telemetry and hotwire anemometry were used to characterize and gain insight on the dynamics of splitters and wake flow. Results show that the motions of the splitters contain various dominating modes, e.g. $f_{p}$ and $f_{v}$, which are induced by the mean flow and wake dynamics. High background turbulence d

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Allen, Nicholas D. C., David R. Worton, Paul J. Brewer, Celine Pascale, and Bernhard Niederhauser. "The importance of cylinder passivation for preparation and long-term stability of multicomponent monoterpene primary reference materials." Atmospheric Measurement Techniques 11, no. 12 (2018): 6429–38. http://dx.doi.org/10.5194/amt-11-6429-2018.

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Abstract. Monoterpenes play an important role in atmospheric chemistry due to their large anthropogenic and biogenic emission sources and high chemical reactivity. As a consequence, measurements are required to assess how changes in emissions of monoterpenes impact air quality. Accurate and comparable measurements of monoterpenes in indoor and outdoor environments require gaseous primary reference materials (PRMs) that are traceable to the international system of units (SI). PRMs of monoterpenes are challenging to produce due to the high chemical reactivity and low vapour pressures of monoterp

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Yao, Fei, Jiachun Zhuang, and Abula Abulikemu. "Shape coefficient of impact-echo for small-size short cylinder/circular tube structures." Materials Testing 64, no. 4 (2022): 574–83. http://dx.doi.org/10.1515/mt-2021-2043.

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Abstract The results tested by the impact-echo method of the small-size short cylinder/circular tube structure were fundamentally different from that of the large-size long one. This phenomenon cannot be described by the existing calculation formulas. To modify the classical calculation formula, finite element models of various sizes of small-size short cylinder/circular tube structures, including 80 cylinders and 125 circular tubes, were established. Modal analysis frequency was compared with numerical simulation of impact-echo frequency under partial working conditions. In addition, the impa

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Bar-Haim, B., and D. Weihs. "Boundary Layer Flow Over Long Cylinders With Suction." Journal of Applied Mechanics 52, no. 1 (1985): 203–7. http://dx.doi.org/10.1115/1.3168998.

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The full, axisymmetric boundary layer equations over a long circular cylinder have been repeatedly solved in the past by a variety of approximate Pohlhausen-type and series expansion methods. These methods are not suitable however, for axisymmetric solutions with wall suction boundary condition. In the present paper, the basic equations are solved by a simple approximate method, based on successive derivatives of the wall compatibility condition. A family of velocity profiles, which coincides with the asymptotic suction profile at infinity, is assumed, and the wall shear force is found by inte

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Campo, Antonio, and Jane Y. Chang. "Streamlining the teaching of unsteady heat conduction in regular solid bodies with heat convection to neighboring fluids." International Journal of Mechanical Engineering Education 45, no. 3 (2017): 245–59. http://dx.doi.org/10.1177/0306419016689496.

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In the analysis of unidirectional, unsteady heat conduction for simple solid bodies (large slab, long cylinder and sphere), the modern tendency adopted by authors of heat transfer textbooks is to calculate the temperatures and total heat transfer with “one-term” series accounting for the proper eigenquantities, which are expressed in terms of the Biot number. The supporting information is available in tables for a large slab, a long cylinder and a sphere. To avoid linear and quadratic interpolation for the Biot numbers listed in the tables, the goal of the present study is to use regression an

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Johnson, R. E., and A. T. Conlisk. "Laminar-film condensation/evaporation on a vertically fluted surface." Journal of Fluid Mechanics 184 (November 1987): 245–66. http://dx.doi.org/10.1017/s0022112087002878.

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Laminar-film flow with condensation or evaporation on a vertical fluted cylinder is examined. A kinematic wave equation describing the evolution of the film profile is obtained and solutions presented. The film profile evolves owing to axial, gravity-driven flow and transverse, surface-tension-driven flow from the crests to the valleys of the fluted cylinder. In the case of condensation the majority of the film reaches a uniform thickness and consequently there is a significant improvement in heat transfer compared with the classical unfluted result where the film thickens in an unbounded fash

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Zeng, Xiaohui, Fajun Yu, Min Shi, and Qi Wang. "Fluctuation of magnitude of wave loads for a long array of bottom-mounted cylinders." Journal of Fluid Mechanics 868 (April 11, 2019): 244–85. http://dx.doi.org/10.1017/jfm.2019.195.

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For wave loads on cylinders constituting a long but finite array in the presence of incident waves, variations in the magnitude of the load with the non-dimensional wavenumber exhibit interesting features. Towering spikes and nearby secondary peaks (troughs) associated with trapped modes have been studied extensively. Larger non-trapped regions other than these two are termed Region III in this study. Studies of Region III are rare. We find that fluctuations in Region III are regular; the horizontal distance between two adjacent local maximum/minimum points, termed fluctuation spacing, is cons

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Fox, T. A. "Wake Characteristics of Two Circular Cylinders Arranged Perpendicular to Each Other." Journal of Fluids Engineering 113, no. 1 (1991): 45–50. http://dx.doi.org/10.1115/1.2926495.

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The turbulent fluid motion established in the wake of two long, smooth circular cylinders arranged perpendicular to each other has been investigated in a steady, low-turbulence, uniform flow at Reynolds numbers of 2×104 and 2×103 (based on cylinder diameter and freestream velocity). A complex three-dimensional regime was found at the center of the configuration, the precise nature of which is dependent upon the spacing of the cylinders. If the distance between the axis of each cylinder is less than three diameters, the fluid motion in the central near wake is dominated by secondary flows assoc

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