Numerical simulation and experimental investigation of three-dimensional gas-jet transportation of powder particles in direct material deposition

2013 ◽  
Author(s):  
Irina Kovaleva ◽  
Oleg Kovalev ◽  
Alexander Zaitsev ◽  
Igor Smurov ◽  
Pascal Aubry ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Three Dimensional ◽  
Gas Jet ◽  
Material Deposition ◽  
Powder Particles

Numerical and Experimental Investigation of Secondary Flow in a High Speed Compressor Stator

1995 ◽  
Author(s):  
Y. Ohkita ◽  
H. Kodama ◽  
O. Nozaki ◽  
K. Kikuchi ◽  
A. Tamura
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Shear Flow ◽  
Secondary Flow ◽  
Total Pressure ◽  
High Speed ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Performance Recovery

A series of numerical and experimental studies have been conducted to understand the mechanism of loss generation in a high speed compressor stator with inlet radial shear flow over the span. In this study, numerical simulation is extensively used to investigate the complex three-dimensional flow in the cascades and to interpret the phenomena appeared in the high speed compressor tests. It has been shown that the inlet radial shear flow generated by upstream rotor had a significant influence on the stator secondary flow, and consequently on the total pressure loss. Redesign of the stator aiming at the reduction of loss by controlling secondary flow has been carried out and the resultant performance recovery was successfully demonstrated both numerically and experimentally.

scholarly journals Study on Fluorine Pollution in a Slag Yard

2019 ◽  
Vol 9 (5) ◽  
pp. 847
Author(s):  
Lide Wei ◽  
Changfu Wei ◽  
Sugang Sui
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Numerical Simulations ◽  
Solute Transport ◽  
Large Scale ◽  
Three Dimensional ◽  
Simulation Method ◽  
Laboratory Studies ◽  
Survey Results ◽  
Simulation Results

This paper suggests a large-scale three-dimensional numerical simulation method to investigate the fluorine pollution near a slag yard. The large-scale three-dimensional numerical simulation method included an experimental investigation, laboratory studies of solute transport during absorption of water by soil, and large-scale three-dimensional numerical simulations of solute transport. The experimental results showed that the concentrations of fluorine from smelting slag and construction waste soil were well over the discharge limit of 0.1 kg/m3 recommended by Chinese guidelines. The key parameters of the materials used for large-scale three-dimensional numerical simulations were determined based on an experimental investigation, laboratory studies, and soil saturation of survey results and back analyses. A large-scale three-dimensional numerical simulation of solute transport was performed, and its results were compared to the experiment results. The simulation results showed that the clay near the slag had a high saturation of approximately 0.9, consistent with the survey results. Comparison of the results showed that the results of the numerical simulation of solute transport and the test results were nearly identical, and that the numerical simulation results could be used as the basis for groundwater environmental evaluation.

scholarly journals Three-dimensional numerical simulation and experimental investigation of boundary-driven streaming in surface acoustic wave microfluidics

Lab on a Chip ◽  
2018 ◽  
Vol 18 (23) ◽  
pp. 3645-3654 ◽  
Author(s):  
Chuyi Chen ◽  
Steven Peiran Zhang ◽  
Zhangming Mao ◽  
Nitesh Nama ◽  
Yuyang Gu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Slip Velocity ◽  
Acoustic Streaming ◽  
Three Dimensional

We investigated the 3D acoustic streaming activated by the IDT immersed in the oil by experimental investigation and numerical simulation using the “slip velocity method”.

Simulation and Experimental Analysis of the Effect of Channel Width on Flow Field in Laser Cutting

2009 ◽  
Vol 626-627 ◽  
pp. 171-176 ◽  
Author(s):  
X.J. Sheng ◽  
Jun Hu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Laser Cutting ◽  
Cone Angle ◽  
Three Dimensional ◽  
Channel Width ◽  
Gas Jet ◽  
Channel Surface ◽  
Symmetrical Model ◽  
Cutting Experiment

A three-dimensional axial symmetrical model of laser cutting is established by adopting N-S equation in the paper, and numerical simulation is put up to analyze the flow field of assist gas in cutting channel. The investigation reveals the law about how channel width affects the dynamic characteristic of gas jet in the cutting process, and the distributions of pressure and velocity of gas jet with different channel widths are shown in the study. The study shows that the intensity of compressed wave and expanded wave in cutting channel declines remarkably with channel width increasing, and the kinetic energy at channel surface drops while the cutting quality is deteriorated. A taper nozzle with cone angle of 30°and a convergence nozzle comprised a parabola equation of are designed for the laser cutting experiment. The experimental results are given at the end of the paper.

Simulation and Optimize Design for Deflector Plate of the Vehicle Mounted Vertically Thermal Launched Missile

2012 ◽  
Vol 459 ◽  
pp. 579-583
Author(s):  
Shao Zhen Yu ◽  
Yi Jiang ◽  
Yan Li Ma ◽  
Yan Yan Ma ◽  
Bo Wei Liu
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Simulation Study ◽  
Three Dimensional ◽  
Gas Jet ◽  
Potential Core ◽  
Structured Grid ◽  
Main Factors ◽  
Deflector Plate ◽  
Volume Method

In this dissertation, academic analysis of the influence to deflector plate in gas jet field of a Vehicle-mounted Vertically Thermal Launched missile as well as simulation study. The finite volume method, a fully structured grid, three-dimensional N-S equation is used for the numerical simulation of the process during the missile launching. The two main factors: temperature and forces on the launcher is the standard we test a launching system. The temperature on the position we test will rise with the decreasing length of the deflector. Especially, when the length is near to the potential core, the temperature changed greatly. Also, the angles of the deflector under the same length have less impacted on the temperature field. However, the force on the deflector would be change greater than the temperature with the change of angles

Numerical and Experimental Investigation of Secondary Flow in a High-Speed Compressor Stator

1997 ◽  
Vol 119 (2) ◽  
pp. 169-175
Author(s):  
Y. Ohkita ◽  
H. Kodama ◽  
O. Nozaki ◽  
K. Kikuchi ◽  
A. Tamura
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Shear Flow ◽  
Secondary Flow ◽  
Total Pressure ◽  
High Speed ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Performance Recovery

A series of numerical and experimental studies have been conducted to understand the mechanism of loss generation in a high-speed compressor stator with inlet radial shear flow over the span. In this study, numerical simulation is extensively used to investigate the complex three-dimensional flow in the cascades and to interpret the phenomena that appeared in the high-speed compressor tests. It has been shown that the inlet radial shear flow generated by the upstream rotor had a significant influence on the stator secondary flow, and consequently on the total pressure loss. Redesign of the stator aiming at the reduction of loss by controlling secondary flow has been carried out and the resultant performance recovery was successfully demonstrated both numerically and experimentally.

scholarly journals Correction: Three-dimensional numerical simulation and experimental investigation of boundary-driven streaming in surface acoustic wave microfluidics

Lab on a Chip ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 3469-3469
Author(s):  
Chuyi Chen ◽  
Steven Peiran Zhang ◽  
Zhangming Mao ◽  
Nitesh Nama ◽  
Yuyang Gu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Three Dimensional

Correction for ‘Three-dimensional numerical simulation and experimental investigation of boundary-driven streaming in surface acoustic wave microfluidics’ by Chuyi Chen et al., Lab Chip, 2018, 18, 3645–3654, DOI: 10.1039/C8LC00589C.

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