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Online since: August 2013
Authors: M. Minervino, R. Örlü, P.H. Alfredsson, A. Hanifi, N. Tillmark, V.I. Borodulin, A.V. Ivanov, Y.S. Kachanov, D.G. Romano
To this aim, a design procedure based on seven steps has been defined and reported below. 1) Generation of a parametric CAD model for the swept-mounted airfoil installed in the wind tunnel with flat walls. 2) CFD mesh generation associated to the CAD model. 3) CFD flow simulations for the “infinite span” WT model, replacing solid sidewalls with periodic boundaries. 4) Extraction of typical streamlines shape from the CFD solution back to the CAD environment. 5) CAD design of the contoured sidewalls based on the reference streamline. 6) CFD mesh generation for the contoured WT configuration. 7) Flow simulation for the contoured WT configuration.
CFD Simulations.
CFD evaluations have been performed using CFD++, the commercial CFD code used by Piaggio Aero Industries, which is based on the finite volume method.
Further simulations for slightly modified configuration were performed by FOI using the EDGE code [4].
[3] Metacomp Technologies Inc., CFD++User Manual – Version 8.1, pages 531-533
Online since: October 2011
Authors: Jun Jie Mao, Song Ying Chen
China achensy66@sdu.edu.cn, btfyt_123@163.com.cn Keywords: Chlorine-induced corrosion, Numerical simulation, Two-phase flow, Chloride deposition.
The use of CFD codes for modeling of two-phase flow, it is important to know whether or not deposition will be present in some sensitive location.
CFD modelling.
CFD model is shown in Fig. 1.
According to the results of numerical simulation, chlorine-induced corrosion is under-predicted.
Online since: February 2013
Authors: Yan Ying Xu, Yu Fen Qian, Ti Hai Xu
The physical and mathematical models are established based on the actual pulse combustor, and the combustion characteristics are simulated with CFD.
Tarjiri and Menon[4] numerical simulated the combustion dynamics of the pulse combustor using large-eddy simulation with CFD software.
Benelli[5] used commercial CFD software to simulate the self-sustaining acoustic oscillation process of the mechanical valve Helmhotlz–type pulse combustor.
Through the simulation and analysis, the main conclusions are as follow: (1) Three possible re-ignition sources for the pulse combustion process.
Simulation of Large Non-Linear Thermo-Acoustic Vibrations in a Pulsating Combustor[J].
Online since: January 2013
Authors: Guo Liang Tao, De Yuan Meng, Peng Fei Qian, Xiao Zhu, He Zuo
The Simulation Study of a new-type Frictionless Pneumatic Cylinder Xiao Zhu1,a, Guoliang Tao1,b,Pengfei Qian1, Deyuan Meng1, He Zuo1 1The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, 310027, China axiaozhu@zju.edu.cn, bgltao@zju.edu.cn Keywords: Frictionless Cylinder, Air Bearing, FEM, Simulation Abstract.
Similar work has been done by Xue-Dong Chen and Xue-Ming He [3] with the help of CFD numerical method.
Renn and Hsiao [4] made an experimental and CFD study on the mass flow rate(MFR) characteristics of orifice-compensated aerostatic bearings.
They found that MFR calculated from the theory, which assumes orifice-type restrictor as a nozzle, might cause large error, and they modified the critical-pressure ratio of the restrictor based on the results of experiments and simulations.
Experimental and CFD study on the mass flow-rate characteristic of gas through orifice-type restrictor in aerostatic bearings.
Online since: June 2013
Authors: Gaetano S. Palazzo, Pierpaolo Carlone
In this paper the influence of the stochastic variability of the fiber packing on tow permeability has been investigated by means of a CFD micro scale model.
CFD simulations of the resin flow through the perturbed RVEs have been performed, solving the continuity and momentum equations using the commercial package ANSYS CFX.
CFD simulations of the resin flow through the perturbed RVEs have been performed on the computational domains defined by the CAD software and shown in Fig. 2.
As can be seen, under deterministic and regularity hypothesis, the permeability results provided by the implemented CFD model fairly agree with the well-known Gebart model.
Du, Three-dimensional Cure Simulation of Stiffened Thermosetting Composite Panels, J.
Online since: November 2014
Authors: Xin Fu, Long Hui Qin, Zhuo Yuan Tang, Liang Hu, Peng Ye
Simulation model and configuration Numerical simulation model.
CFD is based on the k-ε equation containing turbulence energy and turbulent dissipation rate.
In this paper the results after modification based on (3) are obtained through CFD, as listed in Table 2 and marked as EM.
CONCLUSION In this paper, numerical analysis of transducer installation effect on ultrasonic gas flow meter is finished via CFD simulation.
Delsing: Simulation of flow meter calibration factors for various installation effects, Measurement, vol. 15, pp. 235-244 (1995)
Online since: February 2014
Authors: Zhe Liu
A New Inlet Boundary Conditon For LES Zhe Liu Department of Civil Engineering, Shantou University, Guangdong Province, 515063, P.R.CHINA liuzhe@stu.edu.cn Keywords: LES, ARMA, CFD Abstract.
It is known that the inlet boundary condition is still a problem for tubulence simulation.
Introduction The generation of velocity fluctuations for the unsteady inlet boundary condition is one of the important unresolved issues in CFD research.
The standard and dynamic LES models are adopted to compare the simulation results.
The simulation time step is 0.01s.
Online since: April 2016
Authors: Jiří Pospíšil, Martin Lisý, Otakar Štelcl, Michal Špilaček
Optimization of Secondary Air Distribution in Biomass Boiler by CFD Analysis Martin LISÝ1,a *, Jiří POSPÍŠIL1,b, Otakar ŠTELCL1,c and Michal ŠPILÁČEK1,d 1Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Technická 2896/2, 616 69 Brno, Czech Republic alisy@fme.vutbr.cz, bpospisil.j@fme.vutbr.cz, cstelcl@fme.vutbr.cz, dspilacek@fme.vutbr.cz, Keywords: CFD analysis, secondary air, flow, mixing, concentration Abstract.
This paper deals with a use of CFD modelling for optimization of supply of secondary combustion air in the two-chamber biomass boiler combusting very wet biomass (capacity ca. 200 kW).
The numerical model of the experimental boiler was built for subsequent utilization of CFD computation based on the finite element method.
Modern methods of computational simulation are a great tool in optimization of injections of combustion air.
Simulation of the flows in combustion chambers, visualisation of flow distribution and actions of gases are an important ground for optimization of shapes and operational conditions of the furnace.
Online since: July 2013
Authors: Yun Xiang Liu, Xin Xin Yuan, Chen Chao Dou, Fei Xu
CFD can be seen as the numerical simulation of the flow under the control of flow basic equations
FDS Simulation.
Experiment Research of FDS Simulation Fire.
Computer Simulation. 2009 [5] Zhao Qiang.
Computer Simulation Overview of Fire and Flue Gas.
Online since: June 2014
Authors: Jian Nan Liu, Bo Xiong Wang, Yuan Yuan Cui, Hao Yuan Wang
To evaluate the interlaced chord network and the proposed velocity field reconstruction algorithm, numerical simulation experiments were conducted with theoretical profiles and computational fluid dynamics (CFD) models of typical flow regimes.
In numerical simulation experiments, the actual measurement of chord velocities is substituted by interpolation of point velocities along the chords in the CFD models and the theoretical profiles.
The CFD simulation was performed by the software ANSYS CFX.
The reconstructed velocity field can well approximate the CFD simulation result when N=13 transducers are utilized.
(a) CFD simulation result.
Showing 1571 to 1580 of 5269 items