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Relevant bibliographies by topics / Volumetric efficiency modeling

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Academic literature on the topic 'Volumetric efficiency modeling'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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Journal articles on the topic "Volumetric efficiency modeling"

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Leontiev, Aleksandr. "Physical modeling of a skip pneumatic winder." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 4 (June 25, 2021): 64–73. http://dx.doi.org/10.21440/0536-1028-2021-4-64-73.

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Introduction. The analytical phase of research on mine skip pneumatic winders has been passed, so the theoretical provisions have to be tested by the methods of physical modeling which is aimed at confirming the mathematical model adequacy and assessing the effectiveness of different types of sealing devices. Research methods. Physical modeling phases have been formulated, including modeling by geometric and aerodynamic similarity criteria, constructing aerodynamic characteristics of the installation, carrying out experiments with non-contacting and combined seals, and calculating the values o

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Skocypec, R. D., R. F. Boehm, and J. M. Chavez. "Heat Transfer Modeling of the IEA/SSPS Volumetric Receiver." Journal of Solar Energy Engineering 111, no. 2 (1989): 138–43. http://dx.doi.org/10.1115/1.3268299.

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During the summer and fall of 1987 in Almeria, Spain, a wire-pack receiver was tested by the International Energy Agency/Small Solar Power Systems (IEA/SSPS). The basic operation of the receiver is that: air is drawn through several layers of stainless steel wire screen; concentrated solar flux is directed on the face of the screen pack; the oxidized wires absorb the solar energy; and heat is transferred to the air flowing through the screen. Although the experiment goal was strictly proof-of-concept and was not receiver characterization, modeling efforts were initiated to help understand the

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Huang, Yu, Jian Ruan, Yong Chen, Chuan Ding, and Sheng Li. "Research on the Volumetric Efficiency of 2D Piston Pumps with a Balanced Force." Energies 13, no. 18 (2020): 4796. http://dx.doi.org/10.3390/en13184796.

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Axial piston pumps with high rotational speeds are required in many fields to increase the power-to-weight ratio. However, three main sliding friction pairs in the pump restrict the increase in rotational speed. To solve this problem, we propose a 2D piston pump with a balanced force that contains a sliding friction pair. Firstly, the mechanical structure and working principle of the pump are described. Then, the pump volumetric efficiency is studied by mathematical modeling, and volumetric losses containing backflow and leakage are analyzed and discussed from the perspectives of load pressure

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Merala, Raymond, Mont Hubbard, and Takashi Miyano. "Modeling and Simulation of a Supercharger." Journal of Dynamic Systems, Measurement, and Control 110, no. 3 (1988): 316–23. http://dx.doi.org/10.1115/1.3152688.

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A dynamic model is developed for simulating and predicting performance for superchargers of relatively arbitrary geometric configuration. A thermodynamic control volume approach and bond graph models are used to derive continuity and energy equations linking the various control volumes. Bond graphs also serve to study and understand the causal implications of laws governing flows between control volumes and system dynamics. Heat transfer is neglected. Simulation outputs include time histories of pressure, temperature, mass, and energy associated with each control volume, time histories of the

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Doron, P., and A. Kribus. "The Effect of Irradiation Directional Distribution on Absorption in Volumetric Solar Receivers." Journal of Solar Energy Engineering 119, no. 1 (1997): 68–73. http://dx.doi.org/10.1115/1.2871849.

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Volumetric solar absorbers are designed to enable the penetration of radiation deep into the absorber in order to improve the efficiency of the energy transfer from incoming radiation to the working fluid. The design of such absorbers is usually based on the irradiation energy flux distribution. We show that the directional features of the irradiation also affect the absorption characteristics of volumetric absorbers, present criteria for the characterization of directional attributes, and describe a method for their calculation. The significance of the directional data is demonstrated for two

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Ghajar, Mostafa, Amir Hasan Kakaee, and Behrooz Mashadi. "Semi-empirical modeling of volumetric efficiency in engines equipped with variable valve timing system." Journal of Central South University 23, no. 12 (2016): 3132–42. http://dx.doi.org/10.1007/s11771-016-3379-3.

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Yang, Yabin, and Xin Zhou. "A Volumetric Heat Source Model for Thermal Modeling of Additive Manufacturing of Metals." Metals 10, no. 11 (2020): 1406. http://dx.doi.org/10.3390/met10111406.

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In additive manufacturing of metallic materials, an accurate description of the thermal histories of the built part is important for further analysis of the distortions and residual stresses, which is a big issue for additively manufactured metal products. In the present paper, a computationally volumetric heat source model based on a semianalytical thermal modeling approach is proposed. The proposed model is applied to model the thermal response during a selective laser melting (SLM) process. The interaction between the laser and the material is described using a moving volumetric heat source

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Hellmuth, T. E., and L. K. Matthews. "Modeling and Optimum Design of a Wire Mesh Solar Volumetric Air Receiver." Journal of Solar Energy Engineering 119, no. 3 (1997): 208–13. http://dx.doi.org/10.1115/1.2888020.

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This paper describes the development of a computer model to predict the performance of a discrete layer wire mesh solar volumetric air receiver. The model accounts for all important energy transfer processes within the absorber and allows for the use of two different types of wire mesh screens. Model predictions are compared to experimental results for validation purposes. An optimum design analysis is performed to determine optimum receiver characteristics and performance. Results show a predicted efficiency in the range of 89 percent to 87 percent when the outlet air temperature is between 7

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Cascaval, Dan, Corneliu Oniscu, Anca-Irina Galaction, and Fiorina Ungureanu. "Modeling of mixing for stirred bioreactors: 3. Mixing time for aerated simulated broths." Chemical Industry 56, no. 12 (2002): 506–13. http://dx.doi.org/10.2298/hemind0212506c.

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This paper presents the experiments on mixing efficiency for aerated media for a laboratory stirred bioreactor with a double turbine impeller. The effects of stirrer rotation speed, air volumetric flow rate and stirrer position on the shaft on mixing time for aerated water and simulated broths (CMCNa solutions) were analyzed. Compared to non-aerated broths, the results indicated that the variation of mixing time with the considered parameters is very different, due to the complex flow mechanism of the gas-liquid dispersion, a mechanism which is changed by changing the broth properties or ferme

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Ko, Eunhee, and Jungsoo Park. "Diesel Mean Value Engine Modeling Based on Thermodynamic Cycle Simulation Using Artificial Neural Network." Energies 12, no. 14 (2019): 2823. http://dx.doi.org/10.3390/en12142823.

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This study aims to construct a reduced thermodynamic cycle model with high accuracy and high model execution speed based on artificial neural network training for real-time numerical analysis. This paper proposes a method of constructing a fast average-value model by combining a 1D plant model and exhaust gas recirculation (EGR) control logic. The combustion model of the detailed model uses a direct-injection diesel multi-pulse (DI-pulse) method similar to diesel combustion characteristics. The DI-pulse combustion method divides the volume of the cylinder into three zones, predicting combustio

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Dissertations / Theses on the topic "Volumetric efficiency modeling"

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Meyer, Jason Andrew. "Innovations in Representation and Calibration of Residual Gas Fraction and Volumetric Efficiency in a Spark Ignited, Internal Combustion Engine." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211990310.

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Lindell, Tobias. "Model-based Air and Fuel Path Control of a VCR Engine." Thesis, Linköping University, Department of Electrical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-52468.

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<p>The objective of the work was to develop a basic control system for an advancedexperimental engine from scratch. The engine this work revolves around is a Saabvariable compression engine.A new control system is developed based on the naked engine, stripped of theoriginal control system. Experiments form the basis that the control system isbuilt upon. Controllers for throttles, intake manifold pressure for pressures lessthan ambient pressure and exhaust gas oxygen ratio are developed and validated.They were found to be satisfactory. The lambda controller is tested with severalparameter sets,

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Altenhofen, Christian [Verfasser], Dieter W. [Akademischer Betreuer] Fellner, André [Akademischer Betreuer] Stork, and Ursula [Akademischer Betreuer] Augsdörfer. "Volumetric Subdivision for Efficient Integrated Modeling and Simulation / Christian Altenhofen ; Dieter W. Fellner, André Stork, Ursula Augsdörfer." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://d-nb.info/1230062483/34.

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Fenni, Ines. "Efficient domain decomposition methods for electromagnetic modeling of scattering from forest environments." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066264/document.

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Cette thèse porte sur la modélisation et l’analyse de la propagation électromagnétique dans un milieu forestier dans les bandes VHF et UHF. L’objectif principal est le développement d’un modèle numérique "full-wave" tridimensionnel de diffusion par la forêt permettant de caractériser l’interaction d’une onde électromagnétique avec un milieu forestier. Un tel modèle s’avère, actuellement, un outil indispensable à l’analyse des mesures radar pour l’étude des paramètres caractéristiques de la forêt tels que la biomasse forestière, la hauteur des arbres et leur densité. La complexité numérique de

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Altenhofen, Christian. "Volumetric Subdivision for Efficient Integrated Modeling and Simulation." Phd thesis, 2021. https://tuprints.ulb.tu-darmstadt.de/14617/1/Eingereichte%20Version%20vom%2031.07.2020.pdf.

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Continuous surface representations, such as B-spline and Non-Uniform Rational B-spline (NURBS) surfaces are the de facto standard for modeling 3D objects - thin shells and solid objects alike - in the field of Computer-Aided Design (CAD). For performing physically based simulation, Finite Element Analysis (FEA) has been the industry standard for many years. In order to analyze physical properties such as stability, aerodynamics, or heat dissipation, the continuous models are discretized into finite element (FE) meshes. A tight integration of and a smooth transition between geometric desig

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(8776251), Rituraj. "Numerical Methodologies for Modelling the Key Aspects Related to Flow and Geometry in External Gear Machines." Thesis, 2020.

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External gear machines (EGMs) are used in a variety of industries ranging from fluid power machinery to fluid handling systems and fuel injection applications. Energy efficiency requirements and new trends in hydraulic technology necessitate the development of novel EGMs optimized for efficiency and reliability in all of these applications. A crucial piece in the novel EGM development process is a numerical model that can simulate the operation of EGM and predict its volumetric and hydro-mechanical performance.<div><br></div><div>The EGM simulation models developed in the past have focused mos

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Conference papers on the topic "Volumetric efficiency modeling"

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Veeraragavan, Ananthanarayanan, Andrej Lenert, Salem Al-Dini, and Evelyn N. Wang. "Design of Volumetric Solar Flow Receivers." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31001.

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The development of efficient solar thermal receivers has received significant interest for thermal energy to electrical power conversion and heating applications. Volumetric receivers, where the incoming solar radiation is absorbed in a fluid volume, have advantages over state-of-the-art surface absorbers owing to the reduced heat losses at the surface. To efficiently distribute and store the thermal energy in the volume, nanoparticles can be suspended in the liquid medium to scatter and absorb the incoming radiation. In such systems, however, compact models are needed to design and optimize t

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Martensson, Jonas, and Oscar Flardh. "Modeling the Effect of Variable Cam Phasing on Volumetric Efficiency, Scavenging and Torque Generation." In SAE 2010 World Congress & Exhibition. SAE International, 2010. http://dx.doi.org/10.4271/2010-01-1190.

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Lenert, Andrej, Yoshio S. Perez Zuniga, and Evelyn N. Wang. "Nanofluid-Based Absorbers for High Temperature Direct Solar Collectors." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22208.

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Solar collectors with surface receivers have low overall energy conversion efficiencies due to large emissive losses at high temperatures. Alternatively, volumetric receivers promise increased performance because solar radiation can be transferred into a fluid medium, which subsequently reduces the concentrated heat at the surface. Nanofluid-based direct solar receivers, where nanoparticles in a liquid medium can scatter and absorb solar radiation, have recently received interest to efficiently distribute and store the thermal energy. We present a combined modeling and experimental study to in

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Clemente, Stefano, Diego Micheli, Mauro Reini, and Rodolfo Taccani. "Performance Analysis and Modeling of Different Volumetric Expanders for Small-Scale Organic Rankine Cycles." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54302.

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In the last years one of the main research topics in energy field is represented by Organic Rankine Cycles (ORCs), due to their applicability in energy recovery from waste heat and in distributed combined heat and power (CHP) generation, particularly in small and micro scale systems. One of the key devices of the cycle is the expander: it must have a limited cost (like all the other components, in order to ensure the economic feasibility), but also a high efficiency, since the temperature of the heat source is often low and then the cycle efficiency is inherently scarce. In the first part of t

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Wilhelm, Shawn R., and James D. Van De Ven. "Efficiency Testing of an Adjustable Linkage Triplex Pump." In ASME/BATH 2014 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fpmc2014-7856.

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Current state of the art variable displacement pumps suffer from poor efficiency at low volumetric displacement. Additionally, their performance is strongly dependent on operating conditions. A new variable displacement linkage pump architecture has been developed which can achieve high efficiency across a wide range of operating conditions. Previous work has described the kinematics, energy loss modeling, and experimental validation of a low power single cylinder prototype as well as the design of a second generation prototype. The second generation pump employs roller element bearings in its

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Srivastava, Praharsh, Kamal Sharma, and Raushan Jha. "Modeling of Fixed Displacement Swash Plate Compressor: A Mathematical Approach towards Calculation of Shaft Torque and Volumetric Efficiency." In International Mobility Conference. SAE International, 2016. http://dx.doi.org/10.4271/2016-28-0172.

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Ghazi Mir Saied, S. Ahmad, S. Ali Jazayeri, and Amir H. Shamekhi. "Modeling of Variable Intake Valve Timing in SI Engine." In ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1411.

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In internal combustion engines valve events and timings are among the most important parameters which have a major influence on the engine’s operation and volumetric efficiency. By using camless valvetrain strategy, improvement in fuel economy as well as an increase in entering air charge is found throughout the engine map with the largest benefits arising from low speed operating conditions. The system offers a continuously variable and independent control of virtually all parameters of valve motion. This permits optimization of valve events for each operating condition without any compromise

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Kocher, Lyle, Ed Koeberlein, D. G. Van Alstine, Karla Stricker, and Greg Shaver. "Physically-Based Volumetric Efficiency Model for Diesel Engines Utilizing Variable Intake Valve Actuation." In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-5997.

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Advanced diesel engine architectures employing flexible valve trains enable emissions reductions and fuel economy improvements. Flexibility in the valve train allows engine designers to optimize the gas exchange process in a manner similar to how common rail fuel injection systems enable optimization of the fuel injection process. Modulating valve timings directly impacts the volumetric efficiency of the engine. In fact, the control authority of valve timing modulation over volumetric efficiency is three times larger than that due to any other engine actuator. Traditional empirical or regressi

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Ghorpade, Amol, Yogesh Dashroa, M. K. Tiwari, and K. P. Karunakaran. "Introducing Hierarchical Particle Swarm Optimization to Optimal Part Orientation in Fused Deposition Modeling." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99534.

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This article presents hierarchical particle swarm optimization algorithm to determine optimal part orientation for the complex parts produced by fused deposition modeling. Owing to the importance of efficient prototyping during product development phase, it is necessary to address critical issues involved in fused deposition modeling. The best part orientation is explored by taking into account volumetric error, build cost and orientational efficiency in the form of an aggregate objective. This paper exploits the search efficiency exhibited by hierarchical particle swarm optimization (HPSO), a

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Mehrabi, Reza, Mahmoud Kadkhodaei, and Mohammad Elahinia. "Microplane Modeling of Shape Memory Alloys in an Alternative Formulation." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3109.

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In this work, a volumetric-deviatoric split in microplane formulation is considered for modeling of shape memory alloys. In the microplane theory, macroscopic stress tensor is projected into the microplane stresses that are decomposed to either Volumetric-Deviatoric-Tangential (V-D-T) split or Volumetric-Deviatoric (V-D) split. Then 1D constitutive laws are defined between associated microplane stress and microplane strain on any plane. The homogenization process is used according to which macroscopic strain tensor is obtained by integration strains on all orientations at a point. The constitu

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