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CFD Based Study of Hydraulic Performance of an Air-conditioning Drainage Pump Nie xin1, a, Yang Dingguo2,b 1School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, 310018,China, 2School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, 310018,China, axin_nie2000@163.com, byangdingguo130@163.com Keywords: .Air-conditioning drainage pump, Hydraulic Performance, Noise, CFD simulation Abstract: This paper introduces a minor drainage pump used in air-conditioning system.
And LES (Large Eddy Simulation) is taken to catch the pressure fluctuation in the flow passage.
CFD results show that pressure fluctuation is the main sound source in the pump.
Usage of a relatively high density grid has the strengths to get reliable results by CFD.
Study on Numerical Simulation Method of Flow-induced Noise in a Centrifugal Pump[D].

Numerical Simulation of Generator Air Duct Based on CFD Approach Hui Chen 1,a,*, Yulin Zhang1, Mingquan Shi1 and Qinghua Chen2 1Chongqing institute of green and intelligent technology Chinese Academy of Sciences, ChongQing 400714, China 2 PLA chief of staff information division in Chongqing Military Representative Office, ChongQing 400714, China.
a hyelachan@163.com Keywords: generator, CFD, air channel, optimization.
Reference [1] LI Shiwei,Wu Guorong,Tian Jiean, CFD Analysis on the Underhood Heat Management of a Bus, I.C.E.＆.Powerplant,( 2011),p.25-27
[13] Giovanni Cortella, M.M, Giannia Comini, CFD Simulation of Refrigerated Display Cabinets.
Numerical Simulation of Airflow Field in Ship Cabin.

Computational Simulation of Multi-product Flow in an Oil Transportation Pipeline Shian GAOa*andChimaobiDENNARb Department of Engineering,University of Leicester, Leicester LE1 7RH, UK asg32@le.ac.uk,bcd127@le.ac.uk *Corresponding author Keywords:CFD model, VOF,Pipeline, Interface.
Operational data from the Nigerian National Petroleum Corporation was obtained to validate the results from the simulations.
The results obtained from the CFD simulations are verified from the production data and previous theories developed on this subject matter.
CFD Models The CFD approach uses the Navier-Stokes equations, as given below in the general form, to calculatethe velocity and pressure of fluid flow of the system
Simulations were run for 5000 time steps at every 0.001 second.

According to the comparisons, good simulation accuracy could be obtained using the steady state k-ω SST model with small size near wall mesh (y+<5) simulations.
Introduction Recently, Computational Fluid Dynamics (CFD) simulation of the automotive flow field was highly integrated in the new car development process.
Therefore, the high CFD simulation accuracy for the whole flow field around the car was necessary in order to predict the aerodynamic drag.
These uncertain saddle point phenomena were also captured in CFD simulation.
A Calibration Study of CFD for Automotive Shapes and CD.

Yani Tromol Pos 1, Pabelan, 57102, Surakarta, Indonesia asarjito_ums@yahoo.com Keywords: downdraft evaporative cooling; CFD.
Further CFD work to model the prototype performance with water spray evaporation is described briefly.
(c) ANSYS CFX12.1 simulation geometry A detailed computer aided design (CAD) simulation of the full-scale Ben-Gurion device was built and analysed using ANSYS CFX 12.1.
Simulations were carried out over Vref from 0.167 to 7 m/s.
Summary The results of CFD simulations of a novel multi-stage downdraft cooling system in both wind-driven, and wind-driven plus water-spray modes of operation were compared with the experimental results obtained by Erell et al. (2008) and Pearlmutter et al. (2008).

The CFD results provide guidance to improvement of design efficiency and energy utilization. 1.
With the development of CFD technology, CFD simulation method is applied frequently in pneumatic and acoustic performance study of fans in vehicle cooling, electronic components cooling [[] Cao Yuntao, CFD Analysis and Optimization Design for Engine Cooling Fan Performance of Heavy-duty Truck.
MA thesis, 2009, Ji Lin University. ,[] Tang Yongwei, Study on Aerodynamic Performance and Aero-acoustic Performance of Engine Cooling Fan.MA thesis, 2006, Ji Lin University. ] and tunnel ventilation system [[] Yuan Fengdong, You Shijun, Gao Lijiang, Simulation of Axial Fan in Subway based on CFD, J.
The hub diameters used in the simulation are 400mm, 500mm, 600mm, 700mm and 800mm.
Conclusion In this paper, the simulation of variable hub ratio and variable blade number are conducted through the numerical simulation method.

The internal flow field of EGSB (Expanded Granular Sludge Bed) reactor was investigated by using CFD simulation.
Computational fluid dynamics (CFD) is a kind of numerical simulation technology which studies fluid.
The reliability of the simulation was proved.
CFD simulation of an expanded granular sludge bed (EGSB) reactor for biohydrogen production.
A Hydrodynamics-Reaction kinetics coupled model for evaluating bioreactors derived from CFD simulation.

For all range of air velocity and dust cake porosity and permeability employed, data of pressure drop in filter box could be satisfactorily predicted by simulations in CFD.
Furthermore, the CFD simulations showed that undesirable patchy cleaning might be overcome using air velocities lower than 15cm/s.
Characteristics of CFD simulation used The simulations in CFD were made in the commercial software Fluent®, and the computational mesh, composed by 114.250 cells that represent the experimental unit (Figure 1), was built in the commercial software Gambit®, and subsequently exported to Fluent®.
Simulated data using CFD The Figure 4 show a case, in which the fluid flow was performed with no cake, velocity profiles to different superficial velocity of filtration were obtained from the simulations in the filter basis.
Dust Cake Absence Dust Cake Presence CFD Experimental CFD Experimental M [kg/s] ΔP [Pa] ΔP [Pa] ΔP [Pa] ΔP [Pa] a 1.47.10-3 14 16 23 25 B 3.04.10-3 50 51 130 139 C 4.62.10-3 105 108 76000 81800 According to Table 2, it is possible observe that pressure drops obtained by means of fluid dynamics simulations were satisfactorily consistent with experimental data.

A key objective of this work will be to use CFD simulations to optimise the shape of the front wing.
CFD (Computational Fluid Dynamics) simulations are widely used in the design of aerodynamic elements in the automotive and aerospace industries.
In the final phase of this work, the front wing will be tested in a wind tunnel to verify the results from CFD simulations under realistic conditions.
This downscaling helped to better compare the results of the CFD simulations, and the wind tunnel measurements had a similar result with small deviations that could have been due to imperfect model surface or deviations in the CFD model.
Wilcox, Turbulence Modeling for CFD.

Aeroelastic- Acoustics Numerical Simulation Research Xi Pei1,a , Min Xu2,b,Dong Guo3,c College of astronautics, Northwestern polytechnical University, Xi’an 710072, china apeixi5297556@163.com, bxunmin@nwpu.edu.cn, cguodong@nwpu.edu.cn Key words: Aeroelastic-Acoustic, LES, CFD/CSD/CAA coupling, Multidisciplinary Abstract.
The CFD/CSD/CAA coupling is used to simulate rockets cabin.
A new method which CFD/CSD/CAA coupled solution is present.
Fig.2 shows the mode shapes mapped into CFD surface grid.
This methodology employs CFD/CSD/CAA coupling.