Three-dimensional simulation and performance evaluation of air distribution in horizontal storage bins

2016 ◽  
Vol 142 ◽  
pp. 42-52 ◽  
Author(s):  
Oleg A. Khatchatourian ◽  
Manuel O. Binelo ◽  
Vanessa Faoro ◽  
Nelson A. Toniazzo
Keyword(s):  
Performance Evaluation ◽  
Three Dimensional ◽  
Air Distribution ◽  
Dimensional Simulation ◽  
And Performance ◽  
Storage Bins

Actuator volumes andhr-adaptive methods for three-dimensional simulation of wind turbine wakes and performance

Wind Energy ◽  
2011 ◽  
Vol 15 (6) ◽  
pp. 847-863 ◽  
Author(s):  
Angus C.W. Creech ◽  
Wolf-Gerrit Früh ◽  
Peter Clive
Keyword(s):  
Wind Turbine ◽  
Three Dimensional ◽  
Adaptive Methods ◽  
Dimensional Simulation ◽  
And Performance

Numerical Investigation of the 3D Flow Field in a Steam Turbine Axial Exhaust Diffuser: Comparison With Experimental Data and Performance Evaluation

2013 ◽  
Author(s):  
Federico Daccà ◽  
Claudio Canelli ◽  
Stefano Cecchi
Keyword(s):  
Experimental Data ◽  
Performance Evaluation ◽  
Flow Field ◽  
Steam Turbine ◽  
Three Dimensional ◽  
Measured Data ◽  
Accurate Performance ◽  
And Performance ◽  
Lp Turbine ◽  
Actual Geometry

The purpose of this paper is to present a numerical analysis carried out for the performance evaluation of the axial exhaust diffuser of a LP steam turbine. A set of measured data in an actual real scale steam turbine is available for direct comparison. The three dimensional exhaust flow in a LP steam turbine provided with a 48″ LSB is numerically investigated in different real working conditions by means of 3D CFD analysis. A detailed 3D model of the actual geometry is used in order to catch the highly 3D features of the flow field, avoiding the use of numerical periodicity conditions. Boundary conditions are derived both from experimental data and from specific validated 3D simulations of the main flow of the entire LP turbine section from front stages up to the LSN. The comparison with measured data allows to validate the performed CFD simulations and to provide a reliable complete performance curve of the exhaust diffuser geometry coupled with the 48″ LSB design. An important outcome of the work consists also in a generalized method for accurate performance evaluation of axial diffusers.

Inline Pump Internal Flow Characterization for Optimized Diesel Injection

2008 ◽  
Author(s):  
G. Chiatti ◽  
O. Chiavola ◽  
F. Palmieri
Keyword(s):  
Formation Control ◽  
Fuel Injection ◽  
Three Dimensional ◽  
Internal Flow ◽  
Injection Rate ◽  
Local Pressure ◽  
Injection Process ◽  
Flow Characterization ◽  
Dimensional Simulation ◽  
And Performance

The injection process optimization plays a key role in diesel engine development activities, both for pollutant formation control and performance improvement. The present paper focuses on relatively small diesel units, equipped with fully mechanical injection systems; in detail, the considered system layout is based on the use of spring injectors; the amount of delivered fuel is controlled by the positioning of the pump plunger groove. The paper highlights the role of the inline pump and the influence of fuel characteristics on the system operation. By means of a three-dimensional numerical flow study, the behavior of pump fuel passages and delivery valve is simulated. Then, on the basis of the system features, a complete lumped/one-dimensional numerical model is realized, in which the discharge coefficients evaluated through the three-dimensional simulation are employed. Fuel injection rate and local pressure time histories are investigated, paying specific attention to the occurrence of the relevant phenomena in the system components. Obtained results are compared with experimental data.

Simulating air distribution system for civil aircraft

2021 ◽  
Author(s):  
S.N. Gusarkin ◽  
Skidanov S.N.
Keyword(s):  
Numerical Model ◽  
Distribution System ◽  
Block Diagram ◽  
Empirical Test ◽  
Three Dimensional ◽  
System Structure ◽  
Air Distribution ◽  
Civil Aircraft ◽  
Dimensional Simulation ◽  
System Prototype

The paper considers an air distribution system for a pressurized cabin in a civil aircraft. We propose a method for simulating this system that involves developing a one-dimensional model based on hydraulic computation results for the three-dimensional geometry of the distribution system structure. This approach makes it possible to recompute air distribution in large branching systems relatively quickly and with sufficient accuracy when making changes to their design. The advantages of this method include lower computing costs and lower labour intensity compared to using a modern CFD software package to simulate a full three-dimensional flow in the distribution system structure. The paper describes the operation of the air distribution system prototype and presents the schematic diagram and the functional flow block diagram of the system. We show how to use three-dimensional simulation to determine the discharge characteristics of system pipelines. We present the numerical model constructed for the system and display the capabilities of this model in static and dynamic simulation modes. We analysed the simulation results and confirmed the possibility of using the method proposed for engineering computations. We validated the numerical model using experimental investigation results obtained by means of an empirical test bench simulating the air distribution system prototype.

Development and performance evaluation of a three-dimensional clinostat synchronized heavy-ion irradiation system

2017 ◽  
Vol 12 ◽  
pp. 51-60 ◽  
Author(s):  
Hiroko Ikeda ◽  
Hikaru Souda ◽  
Anggraeini Puspitasari ◽  
Kathryn D. Held ◽  
Jun Hidema ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Ion Irradiation ◽  
Three Dimensional ◽  
Heavy Ion ◽  
Irradiation System ◽  
Heavy Ion Irradiation ◽  
And Performance

Study on the Management Performance Evaluation Model of Water Conservancy Agent Construction Project Based on Maturity and SCP Model

2014 ◽  
Vol 584-586 ◽  
pp. 2282-2285
Author(s):  
Xi Deng ◽  
Ping Gao ◽  
Jia Chen
Keyword(s):  
Performance Evaluation ◽  
Evaluation Model ◽  
Construction Project ◽  
Three Dimensional ◽  
Evaluation Index System ◽  
Management Performance ◽  
Performance Evaluation Model ◽  
Performance Evaluation Index ◽  
Water Conservancy ◽  
And Performance

During the next National Twelfth Five-Year Plan period, more and more water conservancy projects will be used agent construction mode in our country. The research of the management performance evaluation model for water conservancy is significant in improving the agent construction system both in theory and in practice. Considering the characteristics of the water conservancy project, a conceptual model of management performance is established, including agent construction structure and agent construction conduct. And a three-dimensional management performance evaluation model of water conservancy agent construction project is constructed based on the SCP (Structure-Conduct-Performance) analysis paradigm. Through literature review and questionnaire survey, this paper further refined evaluation dimension. Finally, a comprehensive and practical performance evaluation index system which consists of the 13 first-class, 39 second-class indexes is established. Thus, lay solid foundation for the performance evaluation and performance improvement.

Analysis on the Inhomogeneity of Air Intake and Retrofit Optimization of the Air Intake Pipe in the Engine T12V190

2014 ◽  
Vol 635-637 ◽  
pp. 7-12
Author(s):  
Xiao Jie Li ◽  
Zhong Yu Zhao ◽  
Yu Tian Pan
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Three Dimension ◽  
Intake Pipe ◽  
Performance Reduction ◽  
Cavity Structure ◽  
Air Intake ◽  
Dimensional Simulation ◽  
And Performance ◽  
Retrofit Design

Taking the air intake pipe in the engine as the target of the research, the software STAR-CDE is adopted to build a three-dimensional simulation model for the air intake pipe in the engine T12V190 with the aim to solve the problems of air input deficiency, Combustion deterioration and performance reduction of one cylinder caused by the non-uniformity. Moreover, the non-uniformity of the flux of air intake of the air intake pipe is mainly studied and analyzed through a calculation on the CFD of the inner flow field of the three dimension of the air intake pipe in the engine T12V190. In addition, a retrofit design with multiple schemes is made based on the cavity structure of the original mold for the air intake pipe. Finally, through a comparison among the three selected designs, a more feasible retrofit designing scheme and a designing thought on the air intake pipe in the engine with directional significance are got.

Simulation Study on Ventilation & Cooling for an Indoor Substation

2014 ◽  
Vol 672-674 ◽  
pp. 1700-1707 ◽  
Author(s):  
Rui Xu ◽  
Zhong Min Mei ◽  
Ting Fang Yu
Keyword(s):  
Natural Ventilation ◽  
Three Dimensional ◽  
Organization Design ◽  
Temperature Fields ◽  
Design Parameters ◽  
Air Distribution ◽  
Safety And Reliability ◽  
Computational Fluid Dynamics Cfd ◽  
Dimensional Simulation ◽  
Cfd Method

— Based on natural ventilation design scheme for an indoor substation, different air distribution schemes were obtained by changing height and size of air inlets and outlets. For indoor substation, three-dimensional simulation of air distribution was conducted by using Computational Fluid Dynamics (CFD) method. Ventilation & cooling effect of different indoor ventilation schemes were simulated with software (Fluent). By analyzing velocity fields and temperature fields, influences of different design parameters on safety and reliability of main transformer room of indoor substation were compared and analyzed in details. Additionally, characteristics and change rules of air distribution with different parameter variations were concluded. Considerations of ventilation organization design for main transformer room of indoor substation and recommendation for better air distribution schemes were provided. The research results also offered some guidance for design and renovation of ventilation & cooling projects of indoor substation.

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