Search results

The flow characteristic and differential pressure-flow of outlet blockage fault and trouble-free for control valve are simulated by CFD.
Blockage Fault Simulation Analysis Simulation Settings A block is designed at the interface section of valve and pipeline to simulate the outlet blockage fault, and on the basis of it, the flow channel model of outlet blockage is set up.
Table 2 Simulation Settings settings solver turbulence model media boundary conditions differential pressure parameters separating Standard k-ε equation mixed gas pressure inlet / outlet 0.4MPa Analysis of Simulation Results Analysis of Flow Characteristic Fig.5 is the flow characteristic of trouble-free and outlet blockage.
Conclusion Establishing the valve trouble-free and outlet blockage flow model, and applying the CFD numerical simulation of flow characteristic and differential pressure-flow, obtained the following conclusions
References [1] Yantao An, Rujian Ma, Yong Wang, Simulation and Analysis the Internal Flow Field of Control Valve Bonnet Leakage, Applied Mechanics and Materials [J], 2013, 425, 2078-2081

Both the numerical and the experiment results show that the critical flow rate decreases with the increasing annular gap, and the simulation results correspond well with experimental results.
The FLUENT, as the most comprehensive function, the most widely applicability and the popular CFD software package, has been widely used in the aerospace, oil and gas, turbine design etc [6].
Numerical simulation methods The commercial CFD software FLUENT was employed in the study.
Also, the experimental platform was set up to verify the correctness of simulation results.
Wang: Computational Fluid Dynamics Analysis-CFD Software Theory Application (Tsinghua University Press, China 2004).

According to the RNG model and the Euler method, the flow field inside hydrocyclone is simulated by the CFD.
In the past, people focused on the calculation of single-phase velocity field prediction and simulation of each phase, while the single phase swirl and simulation of multiphase were neglected.
Choong, in: A CFD study of the effect of cone dimensions on sampling aerocyclones performance and hydrodynamics, Powder Technology 162 (2006) 126 – 132
Dyakowski: Application of CFD to modelling of the flow in hydrocyclones.Is this a realizable option or still a research challenge?
GARTSHORE, in: A NUMERICAL SIMULATION OF HYDROCYCLONES.

The commercial CFD Fluent software is used to perform all the computations on a Pentium-V with a 2.4 GHz CPU and a 3 Gb memory.
All the simulation results are grid independent.
Thirty years of numerical flow simulation in hydraulic turbomachines.
An improved large eddy simulation of two-phase flows in a pump impeller.
SIMULATION, 2000, 74: 71-74

Through FLUENT numerical simulation, this paper is aimed on studying the influence of outdoor wind environment on indoor environment.
Research Method This paper uses numerical simulation method to study the building indoor and outdoor wind environment.
The computational fluid dynamics (CFD) method is an effective tool for numerical simulation to reality flow phenomena.
CFD numerical simulation method not only cost low, but can meet the accuracy requirements of the engineering design, and the calculation condition of which sets easily, so it is easily for a variety of design scheme set at the beginning of the design [4].
[2] Richao Liu,Zhonghua Tang,Weiyang Qi.Numerical Simulation of Campus Wind Environment[J], Materials Science and Engineering Applications,2011( Part1),In Chinese

Modeling technology and simulation for micro-mechanical gas-flow level-gesture sensor is explained.
Through ANSYS－FLOTRAN CFD program and by means of a series of procedures, such as 3d-modeling, network modifying, loads applying and equation solving, FEM analysis has been obtained.
Choose ANSYS-FLOTRAN CFD analysis function; defining the type of unit.
Meshing is an important step in modelling, which has a great influence on precision and simulation time.
Practical engineering simulation and its application in practice on ANSYS [M].Xi’an：Northwestern Polytechnical University Press，1999.221

Regression Test of Stainless Steel Stamping Well-Pump Based On Numerical Simulation Chuan Wang a, Weidong Shi b, Weigang Lu c, Yan Xu d, Ling Zhoue (Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China) awangchuan198710@126.com, bwdshi@ujs.edu.cn Keywords: stamping pump regression experiment CFD optimization.
Combined with the features of stamping technology, this research was taken on raising the efficiency of stamping well pump, using hydraulic design of impeller and CFD and regression test method.
The research which associates hydraulic design and CFD with regression test is very few nowadays.
Therefore, this paper uses simulation to forecast preliminarily the pump’s efficiency.
Fig.2 Comparisons of efficiency Fig.2 shows that the simulation efficiency of optimization model pump agrees with the experiment value quite well in the entire flow range, the error is within 2%, which proves the accuracy of the whole flow field numerical simulation.

As in many other areas of aerodynamics, computational fluid dynamics (CFD) was introduced as a tool for aerodynamic research and design.
Both the indicial method and the coupled CFD–CSD method were used.
Hoang et al. [5] presented a new integrated CFD–CSD simulation for flutter calculations based on a parallel, multiblock, multigrid flow solver for the Euler/Navier-Stokes’ equations using ANSYS software.
Thin plat with loadcell Fig. 1 Thin plate The simulation of aeroelasticity problem including nonlinear CFD analysis in combination with dynamic structure model, was carried out to study the deformation of the structure under aerodynamic changes over time.
The simulation was set up with the same configuration of experiment.

The power coefficient of bidirectional tidal stream turbine obtained by CFD method is 39.36% at the design tip speed ratio.
The comparison between experimental results and numerical prediction results is shown in Fig.1, and the power coefficients obtained by CFD method are almost the same with experiment results.
Fig.1 The comparison between experimental and CFD Blade design and numerical simulation In this paper, the bidirectional airfoil should be fore-aft symmetry to obtain the same power from the both of the tidal current directions.
Computer Simulation, 2010, 27(3):276-280 (in chinese).

To overcome this difficulty and predict the average pressure that the inner faces of the truncated cone, CFD techniques were used to simulate the same industrial conditions of hydrocyclones H23 and H24.
From the velocity and pressure profiles obtained by CFD techniques, it was numerically calculated mean pressures that internal walls were submitted (Eq. 4).
From the velocity and pressure profiles obtained by CFD techniques, it was numerically calculated mean pressures that internal walls were submitted (Eq. 4).
For registration purposes, the CFD simulations in hydrocyclones were two-dimensional, permanent and axis of symmetry.
RESULTS E DISCUSS Preliminarily, CFD simulations were performed in a condition commonly seen operating industrial hydrocyclones for H23 and H24 (−ΔPOA=257881 Pa and −ΔPOA=275351 Pa, respectively).