The Experts below are selected from a list of 198 Experts worldwide ranked by ideXlab platform
Walid Ghie - One of the best experts on this subject based on the ideXlab platform.
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Design and numerical characterization of a first stage of a high capacity multistage centrifugal pump
2016 6th International Conference on Simulation and Modeling Methodologies Technologies and Applications (SIMULTECH), 2016Co-Authors: Nicolas La Roche-carrier, Guyh Dituba Ngoma, Walid GhieAbstract:In this paper, a numerical characterization of a first stage of a high capacity multistage centrifugal pump was performed for very high flow rates. A particular emphasis was placed on the diffuser design procedure. For this purpose, the equations of the continuity and the Navier-Stokes accounting for the boundary conditions were used by mean of ANSYS-CFX code to describe and to simulate the complex liquid flow in the multistage centrifugal pump. In order to identify the key parameters of the diffuser that can improve the pump stage performances, the effects of the inlet height of the diffuser vanes, the number of the diffuser vanes, the number of the diffuser return vanes, and the gap between the impeller and the diffuser on the pump stage head, Brake Horsepower and efficiency were analyzed. The validation of the developed model of a first pump stage was done comparing results of numerical simulations and experimental results obtained from a pump manufacturer.
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SIMULTECH - Design and numerical characterization of a first stage of a high capacity multistage centrifugal pump
Proceedings of the 6th International Conference on Simulation and Modeling Methodologies Technologies and Applications, 2016Co-Authors: Nicolas La Roche-carrier, Guyh Dituba Ngoma, Walid GhieAbstract:In this paper, a numerical characterization of a first stage of a high capacity multistage centrifugal pump was performed for very high flow rates. A particular emphasis was placed on the diffuser design procedure. For this purpose, the equations of the continuity and the Navier-Stokes accounting for the boundary conditions were used by mean of ANSYS-CFX code to describe and to simulate the complex liquid flow in the multistage centrifugal pump. In order to identify the key parameters of the diffuser that can improve the pump stage performances, the effects of the inlet height of the diffuser vanes, the number of the diffuser vanes, the number of the diffuser return vanes, and the gap between the impeller and the diffuser on the pump stage head, Brake Horsepower and efficiency were analyzed. The validation of the developed model of a first pump stage was done comparing results of numerical simulations and experimental results obtained from a pump manufacturer.
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SIMULTECH - Numerical investigation of liquid flow in two-, three- and four-stage centrifugal pumps
Proceedings of the 4th International Conference on Simulation and Modeling Methodologies Technologies and Applications, 2014Co-Authors: Nicolas La Roche-carrier, Guyh Dituba Ngoma, Walid GhieAbstract:In this study, a liquid flow in two-, three- and four-stage centrifugal pumps was numerical investigated. The continuity and Navier-Stokes equations with the k-e turbulence model and standard wall functions were used by means of the ANSYS-CFX code. To enhance the design of the multistage pump, the impacts of the number of impeller blades, diffuser return vanes and the number of stages on the performances of a multistage centrifugal pump were analyzed. The results obtained demonstrate that the selected parameters affect the pump head, Brake Horsepower and efficiency in a strong yet different manner. To validate the model developed, the results of the numerical simulations were compared with the experimental results from the pump manufacturer.
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Numerical investigation of liquid flow in two-, three- and four-stage centrifugal pumps
2014 4th International Conference On Simulation And Modeling Methodologies Technologies And Applications (SIMULTECH), 2014Co-Authors: Nicolas La Roche-carrier, Guyh Dituba Ngoma, Walid GhieAbstract:In this study, a liquid flow in two-, three- and four-stage centrifugal pumps was numerical investigated. The continuity and Navier-Stokes equations with the k-ε turbulence model and standard wall functions were used by means of the ANSYS-CFX code. To enhance the design of the multistage pump, the impacts of the number of impeller blades, diffuser return vanes and the number of stages on the performances of a multistage centrifugal pump were analyzed. The results obtained demonstrate that the selected parameters affect the pump head, Brake Horsepower and efficiency in a strong yet different manner. To validate the model developed, the results of the numerical simulations were compared with the experimental results from the pump manufacturer.
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Numerical Investigation of a First Stage of a Multistage Centrifugal Pump: Impeller, Diffuser with Return Vanes, and Casing
International Scholarly Research Notices, 2013Co-Authors: Nicolas La Roche-carrier, Guyh Dituba Ngoma, Walid GhieAbstract:This paper deals with the numerical investigation of a liquid flow in a first stage of a multistage centrifugal pump consisting of an impeller, diffuser with return vanes, and casing. The continuity and Navier-Stokes equations with the turbulence model and standard wall functions were used. To improve the design of the pump's first stage, the impacts of the impeller blade height and diffuser vane height, number of impeller blades, diffuser vanes and diffuser return vanes, and wall roughness height on the performances of the first stage of a multistage centrifugal pump were analyzed. The results achieved reveal that the selected parameters affect the pump head, Brake Horsepower, and efficiency in a strong yet different manner. To validate the model developed, the results of the numerical simulations were compared with the experimental results from the pump manufacturer.
Morten Simonsen - One of the best experts on this subject based on the ideXlab platform.
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does driving behavior matter an analysis of fuel consumption data from heavy duty trucks
Transportation Research Part D-transport and Environment, 2015Co-Authors: Hans Jakob Walnum, Morten SimonsenAbstract:In a case study of a Norwegian heavy-duty truck transport company, we analyzed data generated by the online fleet management system Dynafleet. The objective was to find out what influenced fuel consumption. We used a set of driving indicators as explanatory variables: load weight, trailer type, route, Brake Horsepower, average speed, automatic gearshift use, cruise-control use, use of more than 90% of maximum torque, a dummy variable for seasonal variation, use of running idle, use of driving in highest gear, Brake applications, number of stops and rolling without engine load. We found, via multivariate regression analysis and corresponding mean elasticity analysis, that with driving on narrow mountainous roads, variables associated with infrastructure and vehicle properties have a larger influence than driver-influenced variables do. However, we found that even under these challenging infrastructure conditions, driving behavior matters. Our findings and analysis could help transport companies decide how to use fleet management data to reduce fuel consumption by choosing the right vehicle for each transportation task and identifying environmentally and economically benign ways of driving.
Guang-lin Tian - One of the best experts on this subject based on the ideXlab platform.
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Application of network-based virtual instrument technology on remote vehicle inspection
2005 International Conference on Machine Learning and Cybernetics, 2005Co-Authors: Yong He, Guang-lin TianAbstract:This paper presents the development of a module of network-based virtual instrument technology which is used for inspecting the performance of vehicles. G Web server provided by NI Corporation helped issue the vehicle inspection panel on the Web. Meanwhile, DataSocket technique helped transfer data through Internet. LabVIEW and Web technology were combined to realize the remote control of vehicle inspection to meet the needs of clients. The system has been proved to be quite effective in the examination of vehicle performances, such as Brake Horsepower, speed, noises, lamplight, smoke intensity and the weight of every axle.
Shao Yong-hua - One of the best experts on this subject based on the ideXlab platform.
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Application of network-based virtual instrument technology for remote inspection of vehicle.
Journal of Zhejiang University Agriculture and Life Sciences, 2004Co-Authors: Shao Yong-huaAbstract:A development module of network-based virtual instrument technology intended to be used for inspecting the performance of vehicle was presented. G web server provided by NI company helped achieve the web issue of vehicle inspection front panel. Meanwhile DataSocket technique helped achieve data transfer through internet. LabVIEW and web technology were combined to realize the remote control of vehicle inspection to meet the needs of clients. The system has been proved to be quite effective in performance examination of vehicle, such as Brake Horsepower, speed, noise, lamplight, smoke intensity and the weight of every axle.
Hans Jakob Walnum - One of the best experts on this subject based on the ideXlab platform.
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does driving behavior matter an analysis of fuel consumption data from heavy duty trucks
Transportation Research Part D-transport and Environment, 2015Co-Authors: Hans Jakob Walnum, Morten SimonsenAbstract:In a case study of a Norwegian heavy-duty truck transport company, we analyzed data generated by the online fleet management system Dynafleet. The objective was to find out what influenced fuel consumption. We used a set of driving indicators as explanatory variables: load weight, trailer type, route, Brake Horsepower, average speed, automatic gearshift use, cruise-control use, use of more than 90% of maximum torque, a dummy variable for seasonal variation, use of running idle, use of driving in highest gear, Brake applications, number of stops and rolling without engine load. We found, via multivariate regression analysis and corresponding mean elasticity analysis, that with driving on narrow mountainous roads, variables associated with infrastructure and vehicle properties have a larger influence than driver-influenced variables do. However, we found that even under these challenging infrastructure conditions, driving behavior matters. Our findings and analysis could help transport companies decide how to use fleet management data to reduce fuel consumption by choosing the right vehicle for each transportation task and identifying environmentally and economically benign ways of driving.
