Research on Numerical Simulation Method for 3D Complex Flow in Rotating Machinery

2012 ◽  
Vol 226-228 ◽  
pp. 52-55
Author(s):  
Guang Yu Du ◽  
Zhen Tan ◽  
Wei An ◽  
De Сhun Ba
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Gas Flow ◽  
Turbulence Models ◽  
Simulation Method ◽  
Rotating Machinery ◽  
Field Analysis ◽  
Complex Flow ◽  
Structure Interaction ◽  
Numerical Simulation Method

A numerical simulation method with gas-structure interaction to analyze 3D complex flow in rotating machinery was presented and the effects with different aerodynamic turbulence model for gas-structure interaction was also presented. The blades are an important component in rotating machinery. Gas flow is unsteady three-dimensional turbulence motion with transient and anisotropic. Then the gas flow and the vibration of rotating blades interfere with each other, resulting in a complex coupling effect. It affects the machine efficiency directly. For discussing the effects on flow field of the coupling field, the blade model was built. And flow around the blades was simulated by gas-structure interaction with three turbulence models respectively. The turbulence models were standard κ-ε, renormalization group κ-ε and Smagorinsky LES. A feasible method was provided for flow field analysis in rotating machinery.

Numerical Simulation of Dynamics on Plant Fibers Suspension in Shear-Planar Extensional Flow

2014 ◽  
Vol 1056 ◽  
pp. 66-69 ◽  
Author(s):  
Zan Huang
Keyword(s):  
Differential Equation ◽  
Numerical Simulation ◽  
Flow Field ◽  
Mathematical Simulation ◽  
Extensional Flow ◽  
Simulation Method ◽  
Complex Flow ◽  
Plant Fibers ◽  
Fibers Orientation ◽  
Planar Extensional Flow

A mathematical simulation method is applied to simulate dynamics on plant fibers suspensions in shear-planar extensional flow. Furthermore, the result of differential equation on plant fibers orientation can be obtained in complex flow field.

The Study of Design and Installation Process for Supersonic Nozzle

2012 ◽  
Vol 569 ◽  
pp. 500-503
Author(s):  
Lian Sheng Wu ◽  
Guang Li Li ◽  
Qi Fu
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Flow Field ◽  
Test Section ◽  
Supersonic Nozzle ◽  
Simulation Method ◽  
Supersonic Wind Tunnel ◽  
Numerical Simulation Method ◽  
Field Quality ◽  
The Impact

A practical optimal design method of supersonic nozzle is proposed for a supersonic wind tunnel’s design. Design a set of nozzle wall lines with the same nozzle length and different Mach numbers 1.5, 2.0, 2.5. Use numerical simulation method for the verify and analysis of the designed nozzle. Mainly study the impact of the installation gradient between nozzle and test section on flow field quality. This wind tunnel is the subsonic, transonic and supersonic wind tunnel and its test section cross is 0.2 m × 0.2 m .The impact on flow field quality of the test section was studied quantitatively by using the numerical simulation method. The installation gradient index was given. It has some practical value to the construction of supersonic wind tunnel. At present, this study has been applied in construction of the wind tunnel. The gradient of the test section import shall not be greater than 0.5 mm.

The Impact of Low-Temperature Liquid Hydrogen Filling System on the Bend Pipe

2011 ◽  
Vol 480-481 ◽  
pp. 810-814
Author(s):  
Jian Jun Song ◽  
Xiao Ping Du ◽  
Ji Guang Zhao ◽  
Jing Peng Chen ◽  
Qiao Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Simulation Method ◽  
Liquid Hydrogen ◽  
Bend Pipe ◽  
Numerical Simulation Method ◽  
Filling System ◽  
Launch Site ◽  
The Impact ◽  
Pipe Vibration

The launch site security issues have been became the focus of the world’s research for several decades. Aiming at the filling system, the pipe vibration caused by the liquid hydrogen which flowed through the bend pipe was studied. And based on the computational fluid dynamics, the flow field was simulated according to the numerical simulation method. Then, the changes of flow parameters i.e. pressure and velocity at the bend were observed. The simulation results showed that: (1) the speed and the pressure of the liquid hydrogen would have a sudden change which was caused by flow direction and it would create a vortex which could erode the pipe and lead to the pipe vibration in the region. As a result, the pipe would deteriorate caused by the vortex. (2) the flow field analysis using the numerical simulation method was feasible. And the method provided a flow field distribution directly and design basis for filling system pipes.

scholarly journals A novel numerical simulation method to verify turbulence models for predicting flow patterns in control valves

2015 ◽  
Vol 10 (1) ◽  
pp. JFST0007-JFST0007 ◽  
Author(s):  
Lifei ZENG ◽  
Guanwei LIU ◽  
Jingru MAO ◽  
Qi YUAN ◽  
Shunsen WANG ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Turbulence Models ◽  
Simulation Method ◽  
Flow Patterns ◽  
Control Valves ◽  
Numerical Simulation Method

Simulation of the Flow Parameters of the Multi-Microchannel Aerostatic Restrictor

2012 ◽  
Vol 241-244 ◽  
pp. 1278-1284
Author(s):  
Yu Bing Zhang ◽  
Cai Qin Li ◽  
Dong Sheng Li
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Film Thickness ◽  
Three Dimensional ◽  
Simulation Method ◽  
Gas Pressure ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Flow Parameters ◽  
Numerical Simulation Method

A numerical simulation method, FLUENT,has been selected to simulate the flow field parameters of the multi-microchannel aerostatic restrictor. Pressure, temperature and velocity distributions of the restrictor under different gas film thickness and gas pressure were got and compared. Used Pro / E to establish three-dimensional model of restrictor and imported it into GAMBIT for meshing, and then used FLUENT for simulation.

Sign in / Sign up

Export Citation Format

Share Document