Numerical Simulation of Pressure Distribution around the Reticulated Shell Structure with Large Span

2013 ◽  
Vol 405-408 ◽  
pp. 710-712
Author(s):  
Zi Hou Yuan ◽  
Yi Chen Yuan ◽  
Wei Sun
Keyword(s):  
Pressure Distribution ◽  
Shell Structure ◽  
Fluid Dynamic ◽  
Flow Analysis ◽  
Wind Load ◽  
Wind Pressure ◽  
Large Span ◽  
Dynamic Software ◽  
Computational Fluid Dynamic Software ◽  
Reticulated Shell Structure

In order to investigate the pressure distribution around the reticulated shell structure with large span, a commercial Computational Fluid Dynamic software Fluent is employed to obtain the wind load and the coefficients of the time averaged pressure distribution around the reticulated shell structure in this paper. The numerical simulations of surface pressure are consistent with the experimental results. The characteristics of the wind pressure distribution are described through the flow analysis around the reticulated shell structure. All these discoveries can be used as a reference for the new version of the wind load criteria.

Study on Characteristics of Wind Loading on Open Ended Cantilevered Roof under Typhoon

2012 ◽  
Vol 256-259 ◽  
pp. 788-791
Author(s):  
Zhi Xiang Yin ◽  
Yu Zhang
Keyword(s):  
Pressure Distribution ◽  
Pressure Coefficient ◽  
Surface Wind ◽  
Great Influence ◽  
Wind Load ◽  
Wind Pressure ◽  
Wind Loading ◽  
Load Model ◽  
Large Span ◽  
Wind Pressure Coefficient

Open ended cantilevered roof is different from enclosed roof, because its change of wind pressure distribution is complex, and the wind directions have great influence on it. Up to now, for the characteristics of the structure are very complicated, there is no appropriate wind load model can be used in design, especially under typhoon, a specific wind field. So it is necessary to study the characteristics of wind load on open ended cantilevered roofs of typhoon. Using FLUENT and Computational Fluid Dynamics technology, based on the conventional, Tianpu’s and Shiyuan’s turbulence intensity of the typhoon scenario, a numerical simulation of wind flow around a large-span cantilevered roof was carried out. Analyzed different wind angles of the wind pressure distribution regularities on large-span cantilevered roof. The paper determined the distribution of the surface wind pressure coefficient for the cantilevered roofs, as well as the wind-sensitive parts of structures.

scholarly journals Airflow Patterns around Obstacles with Large-Span Shallow Shell Roof: Wind Tunnel Measurements and Direct Simulation

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Hongying Jia ◽  
Huixue Dang ◽  
Qianying Ma ◽  
Jun-Hai Zhao
Keyword(s):  
Wind Tunnel ◽  
Spherical Shell ◽  
Pressure Distribution ◽  
Shell Structure ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Mechanical Index ◽  
Shape Coefficient ◽  
Large Span ◽  
Wind Vibration

Wind tunnel tests on the rigid model of large-span shallow spherical shell roof structure were carried out. The variation rule and the calculation method for the average shape coefficient of the fluctuating wind pressure under six different typical wind directions were obtained. The wind pressure distribution of the node deflection and cross section stress was numerically investigated and analyzed. Meanwhile, the effect of mechanics-flow form of the typical spherical shell structure on the wind pressure distribution was analyzed quantitatively. In this study, it is found that the results of numerical simulation agree well with the wind tunnel test data. The study on the mechanical characteristics, as well as the wind vibration research, of the spherical shell structure in different working conditions provides a reliable theoretical basis for the mechanical index of the wind vibration.

scholarly journals Increasing the speed of computational fluid dynamics procedure for minimization the nitrogen oxide polution from the premixed atmospheric gas burner

2017 ◽  
Vol 21 (2) ◽  
pp. 1031-1041
Author(s):  
Vasko Fotev ◽  
Miroljub Adzic ◽  
Aleksandar Milivojevic
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Nitrogen Oxide ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Working Time ◽  
Innovative Method ◽  
Gas Burner ◽  
Dynamic Software ◽  
Computational Fluid Dynamic Software

This article presents innovative method for increasing the speed of procedure which includes complex computational fluid dynamic calculations for finding the distance between flame openings of atmospheric gas burner that lead to minimal NO pollution. The method is based on standard features included in commercial computational fluid dynamic software and shortens computer working time roughly seven times in this particular case.

Study on Wind Load about Rotary Reticulated Shell by the Wind Tunnel Experiment

2014 ◽  
Vol 578-579 ◽  
pp. 177-179
Author(s):  
Zi Hou Yuan ◽  
Yi Chen Yuan ◽  
Wei Sun
Keyword(s):  
Reynolds Number ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Experimental Methods ◽  
Wind Load ◽  
Wind Tunnel Experiment ◽  
Wind Pressure ◽  
Model Experiments ◽  
Rigid Model ◽  
Flow Similarity

This paper is to study the wind load of rotary reticulated shell by experimental methods. The article conduct rigid model experiments to reticulated shell, measure wind pressure distribution on shell’top. Similar conditions is to meet production model:geometric similarity,flow similarity , Reynolds number equal. These results can be used as a reference for the new version of the wind load criteria.

Numerical Simulation of Full Oxy-Fired Oscillating Combustion

2002 ◽  
Author(s):  
Ovidiu Marin ◽  
Benjamin Bugeat ◽  
Marc Till ◽  
Olivier Louedin
Keyword(s):  
Numerical Simulation ◽  
Fluid Dynamic ◽  
Combustion Process ◽  
Industrial Applications ◽  
Time Period ◽  
Complex Process ◽  
Combustion Technology ◽  
Dynamic Software ◽  
Computational Fluid Dynamic Software ◽  
Transient Numerical Simulation

Oscillating combustion represents a complex process, leading to significant improvements in high temperature industrial applications. Field demonstrations of the oscillating combustion technology have shown a significant reduction in NOx emissions, increased efficiency and improved operation. To date, no modeling work has been able to quantify these impacts of the technology. This effort presents the results of a numerical simulation study of oscillating combustion in a 450 kW pilot furnace. The combustion process involves a pipe-in-pipe natural gas-fired burner using exclusively oxygen as oxidant. The fuel is introduced into the combustion chamber periodically, given a certain amplitude and a time period, while the oxidant is introduced continuously. The transient numerical simulation uses the Air Liquide proprietary computational fluid dynamic software ATHENA™, analyzing the combustion process at incremental timesteps. The results reported here clearly explain the phenomena observed in the lab, as well as in field demonstrations. Detailed analysis of the mixing process between the fuel and oxidant, combustion of the reactants and heat transfer to the furnace walls is included. It is concluded that oscillating combustion represents a powerful solution to many industrial applications, and that modeling can play an important role in explaining the process, and in optimizing the system operation.

scholarly journals Numerical Prediction of the Cavitation in Pumps

2002 ◽  
Author(s):  
Philippe Dupont ◽  
Ernesto Casartelli
Keyword(s):  
Design Process ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Numerical Prediction ◽  
Main Flow ◽  
Point Of View ◽  
Specific Speed ◽  
Dynamic Software ◽  
Computational Fluid Dynamic Software

This paper presents a comparison between a coupled and a non-coupled approach for the prediction of the cavitation development in pumps. The coupling is defined here as the influence of the development of the cavitation on the main flow. Commercial CFD (computational fluid dynamic) software having a cavitation module and in-house developed code are used for this comparison. The intention of the authors is to evaluate these methods and their capabilities in predicting cavitating performance of pumps from an industrial point of view. In a first part, the two methods used are introduced and developed. In a second part, the results of these two approaches are compared for two impellers of the same specific speed having small geometrical differences leading to significant differences in the cavitation development. The ability and the benefits of the use of these different cavitation prediction approaches in the design process of a pump are finally discussed.

scholarly journals Cavitating Flow Calculations in Industry

2003 ◽  
Vol 9 (3) ◽  
pp. 163-170 ◽  
Author(s):  
Philippe Dupont ◽  
Tomoyoshi Okamura
Keyword(s):  
Centrifugal Pump ◽  
Design Process ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Point Of View ◽  
Prediction Methods ◽  
Software Packages ◽  
Commercial Code ◽  
Dynamic Software ◽  
Computational Fluid Dynamic Software

This paper presents the experiences of two pump manufacturers with numerical cavitation prediction methods available in commercial computational fluid dynamic software or in codes developed in-house. The intention of the authors is to evaluate these methods and their capabilities in predicting the cavitating performance of pumps from an industrial point of view.In the first part of the article, benchmarks were set for three different commercial software packages on the basis of a comparison of measurements obtained for a centrifugal pump. In the second part, the results of a commercial code are compared, for different impellers, to those obtained with a simplified cavitation prediction code.The abilities and the benefits of the various approaches to cavitation prediction in the design process of a pump are discussed.

Validation of Heat Transfer Performance of Electrical Submersible Motor Using CFD

2010 ◽  
Author(s):  
Roshani O’Bryan ◽  
Ketan Sheth ◽  
Bruce Brookbank
Keyword(s):  
Computational Model ◽  
Temperature Rise ◽  
Heat Transfer Performance ◽  
Fluid Dynamic ◽  
Oil Field ◽  
Ansys Cfx ◽  
Submersible Motor ◽  
Dynamic Software ◽  
Multistage Pump ◽  
Computational Fluid Dynamic Software

In oil field applications, the Electrical Submersible Pumping (ESP) unit (comprised of multistage pump, seal and motor) is placed inside a wellbore to provide necessary energy to lift reservoir fluids from the formation to the surface when the energy in the reservoir is not sufficient to lift the fluid to the surface. ESP motors produce heat while operating. The motors are cooled by the well fluid that passes the motor while being pumped. Many well fluids have very limited heat carrying capacity, resulting in higher operating temperature within the motor. Only a limited number of studies have been conducted that have analyzed the inside temperature rise in the motor. A parametric study has been conducted using the computational fluid dynamic software Ansys CFX to examine the profile of the temperature rise in the motor. The computational model is validated by experimental data which showed that the computational model predicts the temperature with 95% accuracy. Therefore, this computational model effectively represents the experimentally determined temperature distribution of the motor.

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