Study and Numerical Simulation on Dynamic Equilibrium of Balance Disc in Multi-stage Pump

2013 ◽  
Vol 49 (04) ◽  
pp. 163 ◽  
Author(s):  
Wanyong ZHAO
Keyword(s):  
Numerical Simulation ◽  
Dynamic Equilibrium ◽  
Multi Stage

Physical modeling and numerical simulation of V-die forging ingot with central void

2014 ◽  
Vol 228 (13) ◽  
pp. 2347-2356 ◽  
Author(s):  
Peter Christiansen ◽  
Jesper H Hattel ◽  
Niels Bay ◽  
Paulo AF Martins
Keyword(s):  
Numerical Simulation ◽  
Physical Modeling ◽  
Small Scale ◽  
Pure Lead ◽  
Die Forging ◽  
Multi Stage ◽  
Deformation Mechanics ◽  
Open Die Forging ◽  
Central Void ◽  
Forging Load

Numerical simulation and physical modeling performed on small-scale ingots made from pure lead, having a hole drilled through their centerline to mimic porosity, are utilized to characterize the deformation mechanics of a single open die forging compression stage and to identify the influence of the lower V-die angle on porosity closure and forging load requirements of large cast ingots. Results show that a lower V-die angle of 120° provides the best closure of centerline porosity without demanding the highest forging loads or developing unreasonably asymmetric shapes that may create difficulties in multi-stage open die forging procedures.

scholarly journals Numerical Simulation of the Flow Through the Return Channel of Multi-Stage Centrifugal Compressors

1998 ◽  
Author(s):  
L. J. Lenke ◽  
H. Simon
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Turbulence Models ◽  
Reynolds Stress Model ◽  
Secondary Flows ◽  
Low Flow ◽  
Load Range ◽  
Design Point ◽  
Multi Stage ◽  
Return Channel

The numerical simulation of the flow within a return channel is reported in this paper. The investigated return channel is typically to join the exit from one stage of a centrifugal machine to the inlet of the next stage. These channel covers the range of extremely low flow coefficients. Different 3-D calculations with two different turbulence models (low-Reynolds-number k-ϵ and explicit algebraic Reynolds stress model) at the design point and part load range show the strongly three-dimensional flow structure with secondary flows on hub and shroud of the deswirl vanes. There are also significant separations downstream of the 180°-bend at suction and pressure side of the vanes. The presented numerical results are compared with experimental data in different planes and at the vane contour. The results indicate small differences between the turbulence models in the prediction of losses, flow angles and separation behavior at design point. At off-design conditions the turbulence models begin to deviate notably in their prediction of separation.

scholarly journals Numerical Simulation of Nonoptimal Dynamic Equilibrium Models

2009 ◽  
Author(s):  
Zhigang Feng ◽  
Jianjun Miao ◽  
Adrian Peralta-Alva ◽  
Manuel S. Santos
Keyword(s):  
Numerical Simulation ◽  
Dynamic Equilibrium ◽  
Equilibrium Models

Numerical Simulation and Structural Optimization of Multi‐Stage Planar Thermoelectric Coolers

2020 ◽  
Vol 217 (22) ◽  
pp. 2000248
Author(s):  
Xiaolei Nie ◽  
Haolan Jiang ◽  
Xiahan Sang ◽  
Ping Wei ◽  
Wanting Zhu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Structural Optimization ◽  
Thermoelectric Coolers ◽  
Multi Stage

Experimental Validation and Numerical Simulation of Static Pressure in Multi-Stage Ferrofluid Seals

2019 ◽  
Vol 55 (3) ◽  
pp. 1-8 ◽  
Author(s):  
Yanjuan Zhang ◽  
Yibiao Chen ◽  
Decai Li ◽  
Zhengmao Yang ◽  
Yilong Yang
Keyword(s):  
Numerical Simulation ◽  
Experimental Validation ◽  
Static Pressure ◽  
Multi Stage

The Numerical Simulation of Multi-Stage Sheet Metal Forming Based on Modified Yoshida-Uemori Hardening Model

2016 ◽  
Vol 725 ◽  
pp. 554-559
Author(s):  
Jiang Chen ◽  
Wen Liang Chen
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Boundary Surface ◽  
Back Stress ◽  
Experimental Result ◽  
Multi Stage ◽  
Tension And Compression

Bauschinger effect is significant for metal forming, particularly for aluminum. A material constitutive model especially for multi-stage sheet metal forming is presented in this paper, which is improved based on Yoshida-Uemori(Y-U) model assumes that there exists different coefficient on equivalent back stress and boundary surface between stages. The prediction of this model is validated through real tension and compression test. Compared to other hardening rules, it can be shown that a more accurate result can be predicted by this model. This model is also successfully applied to be used in the numerical simulation of a multi-stage manufacturing process of an A-pillar, the experimental result demonstrates the advantage of this model in springback analysis in multi-stage simulation over other constitutive model.

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