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Portage, WI, United States

Li Z.-Y.,General Engineering Company
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2015

Based on transverse integration discrete ordinate equation, the relationship between transverse integrated outgoing and incoming flux was analytically obtained in this paper, and with transport nodal neutron balance equation analog to nodal diffusion method, an effective nodal discrete ordinate numerical iteration strategy was obtained. Numerical results indicate that the method given in this paper is feasible and the results are reliable. In addition, the widely used coarse mesh finite difference (CMFD) acceleration technique is adopted in nodal discrete ordinate method and provides good result. ©, 2015, Atomic Energy Press. All right reserved. Source

Li Z.-Y.,General Engineering Company
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014

Nodal method is widespread used in reactor core diffusion code, but as nodal method adopting coarse mesh in order to speedup calculation, so it causes cusping effect. Cusping effect would affect some reactor core diffusion relevant calculation result. In this paper, the partial inserted rod intro-node cross section in nodal method transverse integration equation was explicitly represented, i.e. node axial position dependent cross section step function was introduced. Numerical results indicate the method greatly improves the control rod differential worth deviation of cusping effect, in particular nearly completely eliminates the control rod relevant kinetic problem's deviation of this effect. ©, 2014, Atomic Energy Press. All right reserved. Source

Thatte M.,Bharati Vidyapeeth Medical College | Vaze D.,General Engineering Company
African Journal of Paediatric Surgery | Year: 2014

Pancreaticoduodenal injuries are rare in children. They pose challenges for the treating surgeon in decision making with respect to diagnosis, surgical and post-surgical management. The management plan must be tailored to the nature and severity of trauma, patient profile, surgeon′s expertise and the resources available at surgeon′s disposal. We describe a pancreaticoduodenal injury in 3-year-old child with successful outcome and follow-up of a decade. Source

Wang J.-L.,China National Petroleum Corporation | Xing Y.-J.,China National Petroleum Corporation | Liu J.-E.,General Engineering Company
Well Testing | Year: 2016

By running down-hole choke to solve hydrate frozen block phenomenon of condensate gas and oil exploration in the trial process tubing, problems such as it is tuck for tubing inner wall wax are met. Designed RD down-hole throttle (down-hole choke) is lowered with production tubing string to hydrate prevention predicted depth, and wellhead pressure changes its status which adjusts down-hole choke sizes to achieve the purpose of the throttle. The throttle valve may be used alone, can also select the appropriate multiple sets of series based on the actual situation. © 2016, The Editorial Department of Well Testing. All right reserved. Source

Xiao B.,Worcester Polytechnic Institute | Wang Q.,General Engineering Company | Wang G.,Worcester Polytechnic Institute | Sisson Jr. R.D.,Worcester Polytechnic Institute | Rong Y.,Worcester Polytechnic Institute
Applied Thermal Engineering | Year: 2010

To predict the microstructures, residual stresses and distortions in the heat treated metal components, it is important to accurately know the heat transfer coefficients (HTCs) between the hot work piece and cooling media. In this paper, a new method is presented to accurately determine the node-based HTC distribution by coupling computational fluid dynamics (CFD) with optimal weight functions and scale factors. With this new method, the predicted temperature profile of the work piece during quenching (rapid cooling) is in excellent agreement with experimental measurements. This new method can be also applied to accurately predict convection heat transfer in thermal equipment such as heat exchangers and refrigerators, building thermal design and other heat transfer related situations. © 2010 Elsevier Ltd. All rights reserved. Source

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