Relevant bibliographies by topics / Pressure calculation

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Pressure calculation'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Pressure calculation"

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Hao, Shouzhi, and Jian Su. "Basic Snow Pressure Calculation." IOP Conference Series: Materials Science and Engineering 317 (March 2018): 012018. http://dx.doi.org/10.1088/1757-899x/317/1/012018.

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Hall, J. R., and R. G. Brouillard. "Water vapor pressure calculation." Journal of Applied Physiology 58, no. 6 (June 1, 1985): 2090. http://dx.doi.org/10.1152/jappl.1985.58.6.2090.

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Accurate calculation of water vapor pressure for systems saturated with water vapor can be performed using the Goff-Gratch equation. A form of the equation that can be adapted for computer programming and for use in electronic databases is provided.
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Belyaev, Aleksandr V., Alexey V. Dedov, Ilya I. Krapivin, Aleksander N. Varava, Peixue Jiang, and Ruina Xu. "Study of Pressure Drops and Heat Transfer of Nonequilibrial Two-Phase Flows." Water 13, no. 16 (August 20, 2021): 2275. http://dx.doi.org/10.3390/w13162275.

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Currently, there are no universal methods for calculating the heat transfer and pressure drop for a wide range of two-phase flow parameters in mini-channels due to changes in the void fraction and flow regime. Many experimental studies have been carried out, and narrow-range calculation methods have been developed. With increasing pressure, it becomes possible to expand the range of parameters for applying reliable calculation methods as a result of changes in the flow regime. This paper provides an overview of methods for calculating the pressure drops and heat transfer of two-phase flows in small-diameter channels and presents a comparison of calculation methods. For conditions of high reduced pressures pr = p/pcr ≈ 0.4 ÷ 0.6, the results of own experimental studies of pressure drops and flow boiling heat transfer of freons in the region of low and high mass flow rates (G = 200–2000 kg/m2 s) are presented. A description of the experimental stand is given, and a comparison of own experimental data with those obtained using the most reliable calculated relations is carried out.
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Orr, T. LL, and C. Cherubini. "Use of the ranking distance as an index for assessing the accuracy and precision of equations for the bearing capacity of piles and at-rest earth pressure coefficient." Canadian Geotechnical Journal 40, no. 6 (December 1, 2003): 1200–1207. http://dx.doi.org/10.1139/t03-063.

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In many geotechnical design situations, a number of different calculation models have been developed to predict the value of a particular quantity required for use in design calculations, for example, the bearing capacities of driven and root piles, and K0, the at-rest earth pressure coefficient. In this paper the authors show how the dependability of different calculation methods can be compared and assessed using a synthetic probabilistic approach and the ranking distance (RD) index. Measured values, Qmeas, are compared with calculated values, Qcalc, using the "bias factor," defined as the ratio Qmeas/Qcalc. The bias factor values obtained using a particular calculation method are processed to evaluate the "accuracy" and "precision" by calculating a central tendency and a variability statistical parameter, respectively, from the values. The RD index is a comprehensive statistical parameter for assessing the dependability of a particular calculation method and is based on the central tendency and variability. Using the ratios between calculated and measured bearing capacity and earth pressures values, the RD index is used to assess the accuracy and precision of the most frequently used pile driving formulae, two equations for the bearing capacity of root piles, and seven equations for the at-rest earth pressure coefficient.Key words: accuracy, precision, probabilistic approach, ranking distance.
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KOSICHENKO, YU М. "UNIVERSAL METHOD FOR CALCULATING WATER PERMEABILITY OF ANTIFILTRATION LININGS WITH POLYMER GEOMEMBRANES." Prirodoobustrojstvo, no. 4 (2020): 6–13. http://dx.doi.org/10.26897/1997-6011-2020-4-6-13.

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There is considered a method for calculating water permeability of the main types of channel linings using geosynthetic materials – concrete film and soil film with polymer geomembrane and geotextile. During a long-term operation of irrigation channels it is necessary to carry out a quantitative assessment of water permeability of the linings, the results of which find filtration losses and determine the calculated efficiency. Modern anti-filtration channel linings made of geosynthetic materials can provide a high technical efficiency and durability of the lining. Based on the previously obtained theoretical solutions through single damages, a universal method has been developed that can be used to calculate water permeability of the main types of linings using geomembranes (concrete fi lm and soil fi lm). There are given calculation schemes through soil film and concretefilm lining and calculation dependences for the main calculation cases in the presence of cracks and holes in the screen on a highly permeable base and taking into account the influence of the permeability of the underlying base. The influence of the base permeability is taken into account in the calculations by the piezometric pressure h1at the damage place of to the geomembrane screen which is a residual pressure between the lining and soil base. The residual pressure can have both a positive sign under the excess pressure and a negative sign under formation of vacuum pressure. The calculation formulasfor determining the piezo-metric pressure at the place of damage are found using the equation of continuity of the filtration flow passing through defects and damages of the lining. Based on the developed method for calculating water permeability an example of calculation is considered which indicates a high efficiency of linings using geomembranes (concrete film and soil film) and for the concrete lining the condition of efficiency is not fulfilled.
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Saito, Shigeru. "Pressure Loss Calculation Software-2002." JAPAN TAPPI JOURNAL 57, no. 3 (2003): 392–98. http://dx.doi.org/10.2524/jtappij.57.392.

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Mikhalev, M. A. "Hydraulic calculation of pressure pipes." Magazine of Civil Engineering 32, no. 6 (October 2012): 20–28. http://dx.doi.org/10.5862/mce.32.3.

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Luks, K. D., E. A. Turek, and L. E. Baker. "Calculation of Minimum Miscibility Pressure." SPE Reservoir Engineering 2, no. 04 (November 1, 1987): 501–6. http://dx.doi.org/10.2118/14929-pa.

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Wang, Yun, and Franklin M. Orr. "Calculation of minimum miscibility pressure." Journal of Petroleum Science and Engineering 27, no. 3-4 (September 2000): 151–64. http://dx.doi.org/10.1016/s0920-4105(00)00059-0.

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Oyama, Mark A., Jess A. Weidman, and Steven G. Cole. "Calculation of pressure half-time." Journal of Veterinary Cardiology 10, no. 1 (June 2008): 57–60. http://dx.doi.org/10.1016/j.jvc.2008.02.002.

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Dissertations / Theses on the topic "Pressure calculation"

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Karlsen, Andreas Grav. "Surge and Swab Pressure Calculation : Calculation of Surge and Swab Pressure Changes in Laminar and Turbulent Flow While Circulating Mud and Pumping." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25542.

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Pressure changes due to Surge and Swabs has in many years been a big concern in the industry. If the pressure changes become too high, the formation can fracture, and formation influx can lead to a kick. In worst case scenarios this kick can lead on to blow out and put human life in danger. This thesis focuses the fundamental theory and on a program that can calculate the pressure changes in turbulent and laminar flow conditions for non-Newtonian fluids. The program lets you choose what sections of the well you are interested in, as well as calculations regarding ECD. In this master thesis a program calculating Surge and Swab pressures in laminar and turbulent flow has been developed. The laminar pressures are calculated from an equation that is developed based on Brooks(1980), and the turbulent flow equation is based on the work of Saasen (2012). The results in this thesis are based a sensitivity analysis of the laminar- and turbulent flow equation derived in this thesis. The results give realistic pressure changes and are a good indicator for what it to expect. Unfortunately was not real drilling data provided to compare the program with real drilling data results. This study show that handling of the different parameters is important. The speed when running or pulling out of hole is important to control, since the pressure change increases rapidly as the velocity increases. Handling of the wellbore geometry is also an important factor to control. If the flow area increases, the pressure change gets higher. In laminar flow the pressure change also depends on the Flow behavior index n, and the Power Law Constant K. It is observed that when the Flow behavior index drops below 0,5 the pressure change increases rapidly. Pressure change also increases with a decreasing Power Law constant K. For the turbulent flow it is observed that the pressure increases exponentially with the velocity. This underlines the importance of managing the velocity during running- or tripping operations. Length of the section changes the pressures linearly. For future work it is important to test the models up more towards real time drilling data from the industry. It has been a difficult task to access drilling data, since most drilling reports are confidential.
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Pan, Zhao. "Error Propagation Dynamics of PIV-based Pressure Field Calculation." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6353.

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Particle Image Velocimetry (PIV) based pressure field calculation is becoming increasingly popular in experimental fluid dynamics due to its non-intrusive nature. Errors propagated from PIV results to pressure field calculations are unavoidable, and in most cases, non-negligible. However, the specific dynamics of this error propagation process have not been unveiled. This dissertation examines both why and how errors in the experimental data are propagated to the pressure field by direct analysis of the pressure Poisson equation. Error in the pressure calculations are bounded with the error level of the experimental data. The error bounds quantitatively explain why and how many factors (i.e., geometry and length scale of the flow domain, type of boundary conditions) determine the resulting error propagation. The reason that the type of flow and profile of the error matter to the error propagation is also qualitatively illustrated. Numerical and experimental validations are conducted to verify these results. The results and framework introduced in this research can be used to guide the optimization of the experimental design, and potentially estimate the error in the reconstructed pressure field before performing PIV experiments.
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Laghaei, Rozita. "Calculation of phase equilibria of quantum fluids at high pressure." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968311326.

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Telenta, Marijo. "AEROSOL CALCULATION AND PRESSURE DROP SIMULATION FOR SIEVING ELECTROSTATIC PRECIPITATORS." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1172857667.

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Finkbeiner, David L. "Calculation of gas-wall heat transfer from pressure and volume data for spaces with inflow and outflow." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12042009-020320/.

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Hardy, Benjamin Arik. "A New Method for the Rapid Calculation of Finely-Gridded Reservoir Simulation Pressures." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1123.pdf.

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Faltýnek, Michal. "Aerodynamický výpočet spalinového traktu parního kotle." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417845.

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The aim of this thesis is to introduce the reader into theory, which is needed to make an aerodynamic calculation of flue gas part of steam boiler. On the back of the knowledge, project documentation and other entry parameters calculate sectional losses for each component and design a ventilator, that is suitable for our requirements.
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Yazdi, Nezhad Simin [Verfasser], and Ulrich [Akademischer Betreuer] Deiters. "Calculation of entropy-dependent thermodynamic properties of fluids at high pressure with computer simulation / Simin Yazdi Nezhad. Gutachter: Ulrich Deiters." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1095765876/34.

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Rogers, David R. "A model based approach for determining data quality metrics in combustion pressure measurement. A study into a quantative based improvement in data quality." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/14100.

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This thesis details a process for the development of reliable metrics that could be used to assess the quality of combustion pressure measurement data - important data used in the development of internal combustion engines. The approach that was employed in this study was a model based technique, in conjunction with a simulation environment - producing data based models from a number of strategically defined measurement points. A simulation environment was used to generate error data sets, from which models of calculated result responses were built. This data was then analysed to determine the results with the best response to error stimulation. The methodology developed allows a rapid prototyping phase where newly developed result calculations may be simulated, tested and evaluated quickly and efficiently. Adopting these newly developed processes and procedures, allowed an effective evaluation of several groups of result classifications, with respect to the major sources of error encountered in typical combustion measurement procedures. In summary, the output gained from this work was that certain result groups could be stated as having an unreliable response to error simulation and could therefore be discounted quickly. These results were clearly identifiable from the data and hence, for the given errors, alternative methods to identify the error sources are proposed within this thesis. However, other results had a predictable response to certain error stimuli, hence; it was feasible to state the possibility of using these results in data quality assessment, or at least establishing any boundaries surrounding their application for this usage. Interactions in responses were also clearly visible using the model based sensitivity analysis as proposed. The output of this work provides a solid foundation of information from which further work and investigation would be feasible, in order to achieve an ultimate goal of a full set of metrics from which combustion data quality could be accurately and objectively assessed.
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Lee, Sung-Mo. "A performance evaluation of low pressure carbon dioxide discharge test." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0430104-041342/.

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Thesis (M.S.)--Worcester Polytechnic Institute.
Keywords: Deap-seated fire; flow calculation; maximum percent of agent in pipe; free efflux; carbon dioxide extinguishing system; low pressure; no efflux; surface fire; NFPA 12. Includes bibliographical references (p. 69-70).
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Books on the topic "Pressure calculation"

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Powell, Suzanne Jane. The calculation of the failure of British Gas pressure vessels. Birmingham: University of Birmingham, 1993.

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Shea-Albin, V. R. Calculation of vertical stress exerted by topographic features. Washington, D.C: U.S., Dept. of the Interior, Bureau of Mines, 1992.

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Val'eho, Mal'donado, and Nikolay Chaynov. Calculation of kinematics and dynamics of inline piston engines. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1058850.

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The textbook discusses the kinematics and dynamics of inline piston internal combustion engines with axial and deaxial crank mechanism. The necessary material for calculating the forces and moments acting in the engine is given, the balancing of engines, the construction of vector diagrams of pressure on the crankshaft bearings are considered, examples of calculations are given. Meets the requirements of the federal state educational standards of higher education of the latest generation. For students of higher educational institutions studying in the field of training "Energy engineering".
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Berriaud, C. Calculation of the wall pressure field generated on a group of buildings by an external explosion. Luxembourg: Commission of the European Communities, 1985.

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Forbes, A. B. A comparison of methods used for the calculation of effective area in the calibration of pressure balances. Teddington: National Physical Laboratory, 1995.

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Aseev, G. G. Electrolytes, equilibria in solutions and phase equilibria: Calculation of multicomponent systems and experimental data on the activities of water, vapor pressures, and osmotic coefficients. New York: Begell House, 1998.

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Vol'vak, Sergey. Hydraulics. Workshop. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1045068.

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Study guide corresponds to the program discipline "Hydraulics". Consists of two parts and is for carrying out practical and laboratory works. The first part provides material on the basics of the calculation of hydraulic machines, hydraulic drives of agricultural machinery, systems of land reclamation and hydraulic transport for development of skills of application of theoretical information to solve specific technical problems and development practices of hydraulic calculations. The second part contains material for the study of the methods and instruments for measuring pressure, the study of the equation of Bernoulli, determination of hydraulic resistance, the study of the structure and principles of operation of positive displacement pumps and dynamic-type, cylinders, volumetric hydraulic drive and hydrodynamic transmission elements and schemes of irrigation systems and agricultural water supply. To conduct practical and laboratory classes for students of all forms of training in the direction of training 35.03.06 "Agroengineering", as well as for graduate students, teachers and technical workers of agriculture.
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Zingg, D. W. Higher-order approximations in interactive airfoil calculations. [Downsview, Ont.]: University of Toronto, 1987.

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Zingg, D. W. Higher-order approximations in interactive airfoil calculations. [Downsview, Ont.]: Institute for Aerospace Studies, 1988.

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Ahmed, Tarek H. Working guide to vapor-liquid phase equilibria calculations. Amsterdam: Elsevier, 2010.

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Book chapters on the topic "Pressure calculation"

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Abtew, Wossenu, and Assefa Melesse. "Vapor Pressure Calculation Methods." In Evaporation and Evapotranspiration, 53–62. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4737-1_5.

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Xu, Zhonglin, and Bin Zhou. "Calculation of Air Change Rate." In Dynamic Isolation Technologies in Negative Pressure Isolation Wards, 147–61. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2923-3_5.

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Ochkov, Valery, and Konstantin Orlov. "Calculation of Pressure Losses in the Tube." In Thermal Engineering Studies with Excel, Mathcad and Internet, 199–218. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26674-9_16.

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Maršálek, Ondřej, Jan Vopařil, and Pavel Novotný. "Validation of Analytical Calculation of Contact Pressure." In Advanced Mechatronics Solutions, 495–500. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23923-1_72.

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Zhao, Muyu, Lizhu Song, and Xiaobao Fan. "Calculation of Binary High-Pressure Phase Diagrams." In The Boundary Theory of Phase Diagrams and Its Application, 178–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02940-0_10.

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Ikeshoji, Tamio. "Pressure Calculation Scheme in a Small Control Volume." In Mesoscopic Dynamics of Fracture, 222–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-35369-1_19.

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Zhao, Muyu, Lizhu Song, and Xiaobao Fan. "The Calculation of High-Pressure Ternary Phase Diagrams." In The Boundary Theory of Phase Diagrams and Its Application, 196–225. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02940-0_11.

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Pijls, Nico H. J., Bernard De Bruyne, Sherif El Biltagui, Mamdouh El Gamal, Hans J. R. M. Bonnier, Guy R. Heyndrickx, K. Lance Gould, et al. "Intracoronary pressure measurements for calculation of flow reserve." In Developments in Cardiovascular Medicine, 207–26. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1172-0_14.

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Pfeiffer, Helge, and Karel Heremans. "On the Calculation of the Compressibility from Ultrasonic Velocity." In Advances in High Pressure Bioscience and Biotechnology II, 481–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05613-4_87.

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Yibin, Li, Gao Yangyu, Li Shenlong, Li Hongyang, Zhang Yang, and Deng Ning. "Pressure Dominated PTT Calculation and Its Relation with BP." In IFMBE Proceedings, 842–44. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02913-9_217.

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Conference papers on the topic "Pressure calculation"

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Wang, Yun, and Franklin M. Orr. "Calculation of Minimum Miscibility Pressure." In SPE/DOE Improved Oil Recovery Symposium. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/39683-ms.

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Dulieu, Pierre, Valéry Lacroix, Do Jun Shim, and Frederick (Bud) Brust. "Benchmark for the Calculation of Quasi-Laminar Elliptical Cracks Interaction Under Bi-Axial Loading." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45788.

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In the frame of the Structural Integrity demonstration of the Doel 3 and Tihange 2 RPVs flawed with quasi-laminar cracks, alternative proximity rules based on 3D eXtended Finite Element Method (X-FEM) calculations have been developed by Tractebel Engineering. The calculations have been performed with the X-FEM software Morfeo Crack. This software uses the Level-Sets method allowing a very straightforward cracks modelling. A large part of the development of these proximity rules for quasi-laminar flaws has been dedicated to the validation of the models and the calculations. This validation has been done through a benchmark with Engineering Mechanics Corporation of Columbus (Emc2). This company uses: • The Finite Element Alternating Method (FEAM) for calculating stress intensity factors through the FRAC@ALT program. The FEAM is a state-of-the-art method for obtaining stress intensity factors for three-dimensional surface and embedded crack problems. • The X-FEM functionality as implemented in Abaqus software. The benchmark consists of the Stress Intensity Factor calculation of interacting quasi-laminar flaws and of the interaction factor assessment as well.
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Mutz, Alexander, and Manfred Schaaf. "Comparison Between Different Calculation Methods for Determining Bolting Up Moments." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63096.

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There are several different standards for flange calculation used in the European and so in the Suisse context. The European Standard EN 1591-1 that is used for the calculation of bolted flanged joints and EN 13555 in which the determination of the required gasket characteristics are defined were reissued in 2013 and in 2014, respectively. The ASME BPVC, Section III, Appendix 11 regulates the flange calculation for class 2 and 3 components in Suisse nuclear power plants it is also used for class 1 flange connections. A standard for the determination of the required gasket characteristics is not well established which leads to a lack of clarity. As a hint, different m and y values for different kind of gaskets are invented in ASME BPVC Section III. As cited in the Note of table XI-3221.1-1 the values m and y are not mandatory. In Switzerland, mainly the ASME BPVC should be used for the calculation of flange connections. The aim of the ASME Code is more or less not the tightness of the flanges but the integrity. Therefore, stresses are derived for dimensioning the flanges. Following loads are not considered neither for calculation of stresses nor for calculation of tightness. Considering the experience with flanges in general it could be asked, if it is more useful to look at the tightness than at the stresses. The codes KTA 3201.2 and KTA 3211.2 regulate the calculation of flange connections in German nuclear power plants. Stresses in floating type and in metal-to-metal contact type of flange connections and the tightness are calculated for the different load cases. In this paper, the differences in the calculations are shown between KTA 3211.2, ASME BPVC, Section III, Appendix 11, EN 1591-1 and Finite element calculations. In all load cases leakage shouldn’t occur. Therefore, internal pressure and temperature in test and operational conditions after bolting-up are also considered for the stress calculation if it is possible in the calculation algorithm.
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Brar, Gurinder Singh, Yogeshwar Hari, and Dennis K. Williams. "Calculation of Working Pressure for Cylindrical Vessel Under External Pressure." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25173.

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Initial geometric imperfections have a significant effect on the load carrying capacity of asymmetrical cylindrical pressure vessels. This research paper presents a comparison of a reliability technique that employs a Fourier series representation of random asymmetric imperfections in a defined cylindrical pressure vessel subjected to external pressure. Evaluations as prescribed by the ASME Boiler and Pressure Vessel Code, Section VIII, Division 2 rules are also presented and discussed in light of the proposed reliability technique presented herein. The ultimate goal of the reliability type technique is to statistically predict the buckling load associated with the cylindrical pressure vessel within a defined confidence interval. The example cylindrical shell considered in this study is a fractionating tower for which calculations have been performed in accordance with the ASME B&PV Code. The maximum allowable external working pressure of this tower for the shell thickness of 0.3125 in. is calculated to be 15.1 psi when utilizing the prescribed ASME B&PV Code, Section VIII, Division 1 methods contained within example L-3.1. The Monte Carlo method as developed by the current authors and published in the literature is then used to calculate the maximum allowable external working pressure. Fifty simulated shells of geometry similar to the example tower are generated by the Monte Carlo method to calculate the nondeterministic buckling load. The representation of initial geometric imperfections in the cylindrical pressure vessel requires the determination of appropriate Fourier coefficients. The initial functional description of the imperfections consists of an axisymmetric portion and a deviant portion that appears in the form of a double Fourier series. Multi-mode analyses are expanded to evaluate a large number of potential buckling modes for both predefined geometries and the associated asymmetric imperfections as a function of position within a given cylindrical shell. The method and results described herein are in stark contrast to the dated “knockdown factor” approach currently utilized in ASME B&PV Code.
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Song, Yuxiang. "Calculation of Surrounding Rock Pressure Based on Pressure Arch Theory." In 2016 5th International Conference on Advanced Materials and Computer Science (ICAMCS 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icamcs-16.2016.59.

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Lu, F., H. Y. Qian, P. Huang, and R. S. Wang. "Comparison of Pressure-Temperature Limit Curves Calculation." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57449.

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Reactor Pressure Vessel (RPV) is one of the most important components in a nuclear power plant (NPP). The primary concern of aging mechanism for RPV is irradiation embrittlement. In order to prevent brittle fracture, during NPP heatup and cooldown processes, the pressure and temperature in RPV should be kept under the pressure-temperature (P-T) limit curve. The P-T limit curve method originated from a WRC bulletin in 1972 and was included in ASME Sec. XI App. G.. Since then, much effort for reducing the conservatism of the P-T limit curve calculation has been made in many countries. Technology developed over the last 30 years has provided a strong basis for revising the P-T limit curve methodology. Up to now, changes have been made in the latest version of the ASME and RCCM codes. In this paper, the P-T limit curve methodologies given by the ASME code, the RCCM code, and Chinese Nuclear Industry Standard EJ/T 918 are studied. The differences of the P-T curve methodologies in previous and current versions for the ASME and RCCM codes are discussed. Two P-T curve calculation methods based on the RCCM code Ver. 2007 are proposed, due to lack of specific description for the calculation method in the RCCM code. Comparison of the P-T curves obtained using methods from different codes is also performed. It shows that using static fracture toughness KIC instead of reference fracture toughness KIR to calculate P-T curves can increase acceptable operating region during NPP heatup and cooldown processes significantly. Comparing with the latest versions of the ASME and RCCM codes, the current Chinese Standard is more conservative.
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Lejeune, Hubert, and Frédéric Joulain. "Optimization of Valves Packings Through Characterization and Calculation." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93045.

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Abstract In the valve industry, there is combined demand from the end-users for fugitive emissions reduction and energy efficiency improvement through the reduction of stem/packing friction forces. These two different goals will involve opposite trends on the load to be applied on the packing i.e. high load for good tightness and low load for low friction. Thus, the ability to define optimal ranges of packing tightening is important. Nevertheless, no standardized method for packing calculation nor packing full characterization (mechanical, friction, sealing performance vs. packing load,..) exists in Europe, as for bolted flange joints and associated gasket with EN1591-1 [1] and EN13555 [2]. In collaboration with ESA (European Sealing Association, www.europeansealing.com) and FSA (Fluid Sealing Association, www.fluidsealing.com), the Fluid Equipment Committee of CETIM has developed a tool for the optimization of packing. A set of tests enables to get the packing characteristics needed for the calculation. These tests can also be used for the comparison of packing materials and/or installation procedures performances in defined test conditions. This paper details the proposed calculation method and describes the associated test rigs and procedures. First test results and a calculation example are also given to show how the method works.
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Wang, Zhanghai, Daryl Bast, and David Shen. "Butane Storage Bullet Calculation and FEA Verification." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71123.

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This paper presents a comparative study of FEA with the Zick’s method of analysis for a two saddles-supported horizontal cylindrical tank. Zick’s method is an analytical method commonly used in horizontal vessel support design. We used two methods to calculate local stresses in selected areas with the findings that the results of these two methods produced very agreement. These results are used to verify the FEA for this application. We then used FEA to get more detailed information about stress distribution, which cannot be obtained using the Zick’s method. FEA was further used to study the buckling behavior of the object and to determine some critical parameters of the object, e.g., the vacuum ring weld size with consideration of both external and internal loads.
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Kulkarni, Mahesh, and Vivek Dewangan. "Finite Element Analysis Based Stress Intensification Factor Calculation and Comparison With Various Approaches for Stress Intensification Factor Calculation." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65094.

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Piping caters a major role in the process industries wherein stress intensification factor (SIF) express the Piping flexibility of the system. A typical Piping system consists of combination of pipes and various fittings with intersection geometries namely bend, tee, reducer, etc. A SIF is a multiplier on nominal bending stress so that the effect of geometry and welding can be considered in a flexibility analysis. An attempt has been made to compare the SIF values among ASME Piping B31.3, Welded Research Council (WRC) Bulletin 329, Paulin Research Group (PRG) empirical data and shell-based finite element analysis (FEA) for various tee sections based on in-plane and out-plane bending moments through this paper. The bending moment which causes tee to open/close in the plane formed by two limbs of tee is called in-plane bending moment. The bending moment which causes branch of tee to displace out of the plane retaining run pipe steady is called Out-plane bending moment. ASME B31.3 provide guidelines to evaluate SIF values through empirical formulation as per Appendix-D with few limitations listed below. 1. Valid for d/D < 0.5 only 2. Non-conservative for 0.5 < d/D < 1.0 3. Valid for D/T ≤ 100 4. SIF values calculated with respect to header pipe. There is no difference in SIF values for header and branch pipe and it is the average value. WRC 329 was published in 1987 and has not been updated taking ASME B31.3 latest edition into account. PRG carried out SIF for the various sizes and types of tee fittings and prepared correlation equations through detailed FEA using nonlinear regression and test data.
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Wasiluk, Bogdan S., and Douglas A. Scarth. "Engineering Procedure for Calculation of Elastic Stress Concentration Factors of Bearing Pad Fretting Flaws." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77271.

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Procedures to evaluate volumetric bearing pad fretting flaws for crack initiation are in the Canadian Standard N285.8 for in-service evaluation of CANDU® pressure tubes. The crack initiation evaluation procedures use equations for calculating the elastic stress concentration factors. Newly developed engineering procedure for calculation of the elastic stress concentration factor for bearing pad fretting flaws is presented. The procedure is based on adapting a theoretical equation for the elastic stress concentration factor for an elliptical hole to the geometry of a bearing pad fretting flaw, and fitting the equation to the results from elastic finite element stress analyses. Non-dimensional flaw parameters a/w, a/c and a/ρ were used to characterize the elastic stress concentration factor, where w is wall thickness of a pressure tube, a is depth, c is half axial length, and ρ is root radius of the bearing pad fretting flaw. The engineering equations for 3-D round and flat bottom bearing pad fretting flaws were examined by calculation of the elastic stress concentration factor for each case in the matrix of source finite element cases. For the round bottom bearing pad fretting flaw, the fitted equation for the elastic stress concentration factor agrees with the finite element results within ±3.7% over the valid range of flaw geometries. For the flat bottom bearing pad fretting flaw, the fitted equation agrees with the finite element results within ±4.0% over the valid range of flaw geometries. The equations for the elastic stress concentration factor have been verified over the valid range of flaw geometries to ensure accurate results with no anomalous behavior. This included comparison against results from independent finite element calculations.
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Reports on the topic "Pressure calculation"

1

Nguyen, Doan Ngoc, and Joonwoo Lee. Calculation of Eddy Current and Temperature Change in Clamping Plate of Pressure Cell. Office of Scientific and Technical Information (OSTI), July 2018. http://dx.doi.org/10.2172/1461386.

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Guarino, V. Calculation of C5 stresses and deflections in C5 due to thermal and pressure loading. Office of Scientific and Technical Information (OSTI), February 2008. http://dx.doi.org/10.2172/924697.

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Ramsey, John C. BACoN Cryostat Pressure Relief Calculations. Office of Scientific and Technical Information (OSTI), October 2013. http://dx.doi.org/10.2172/1098276.

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Riedel, E. E., K. I. Johnson, and F. A. Simonen. Fracture mechanics calculations for hydrostatic testing of pressure tubes. Office of Scientific and Technical Information (OSTI), January 1988. http://dx.doi.org/10.2172/6193466.

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Sarychev, Michael. Liquid Nitrogen Subcooler for Calorimeters LN2 Supply: Pressure Vessel Calculations. Office of Scientific and Technical Information (OSTI), February 2004. http://dx.doi.org/10.2172/1033661.

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Remec, I. Two benchmarks for qualification of pressure vessel fluence calculational methodology. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/650147.

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Kuwazaki, Andrew, and Todd Leicht. D0 Silicon Upgrade: ASME Code and Pressure Calculations for Liquid Nitrogen Subcooler. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/1033296.

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Job, Jacob. Mesa Verde National Park: Acoustic monitoring report. National Park Service, July 2021. http://dx.doi.org/10.36967/nrr-2286703.

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In 2015, the Natural Sounds and Night Skies Division (NSNSD) received a request to collect baseline acoustical data at Mesa Verde National Park (MEVE). Between July and August 2015, as well as February and March 2016, three acoustical monitoring systems were deployed throughout the park, however one site (MEVE002) stopped recording after a couple days during the summer due to wildlife interference. The goal of the study was to establish a baseline soundscape inventory of backcountry and frontcountry sites within the park. This inventory will be used to establish indicators and thresholds of soundscape quality that will support the park and NSNSD in developing a comprehensive approach to protecting the acoustic environment through soundscape management planning. Additionally, results of this study will help the park identify major sources of noise within the park, as well as provide a baseline understanding of the acoustical environment as a whole for use in potential future comparative studies. In this deployment, sound pressure level (SPL) was measured continuously every second by a calibrated sound level meter. Other equipment included an anemometer to collect wind speed and a digital audio recorder collecting continuous recordings to document sound sources. In this document, “sound pressure level” refers to broadband (12.5 Hz–20 kHz), A-weighted, 1-second time averaged sound level (LAeq, 1s), and hereafter referred to as “sound level.” Sound levels are measured on a logarithmic scale relative to the reference sound pressure for atmospheric sources, 20 μPa. The logarithmic scale is a useful way to express the wide range of sound pressures perceived by the human ear. Sound levels are reported in decibels (dB). A-weighting is applied to sound levels in order to account for the response of the human ear (Harris, 1998). To approximate human hearing sensitivity, A-weighting discounts sounds below 1 kHz and above 6 kHz. Trained technicians calculated time audible metrics after monitoring was complete. See Methods section for protocol details, equipment specifications, and metric calculations. Median existing (LA50) and natural ambient (LAnat) metrics are also reported for daytime (7:00–19:00) and nighttime (19:00–7:00). Prominent noise sources at the two backcountry sites (MEVE001 and MEVE002) included vehicles and aircraft, while building and vehicle predominated at the frontcountry site (MEVE003). Table 1 displays time audible values for each of these noise sources during the monitoring period, as well as ambient sound levels. In determining the current conditions of an acoustical environment, it is informative to examine how often sound levels exceed certain values. Table 2 reports the percent of time that measured levels at the three monitoring locations were above four key values.
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Yager, Robert J. Calculating Atmospheric Conditions (Temperature, Pressure, Air Density, and Speed of Sound) Using C++. Fort Belvoir, VA: Defense Technical Information Center, June 2013. http://dx.doi.org/10.21236/ada588839.

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Wong, Christopher F. A computer code for calculating subcooled boiling pressure drop in forced convective tube flows. Office of Scientific and Technical Information (OSTI), December 1988. http://dx.doi.org/10.2172/5910189.

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