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Simulation and Experiment of Temperature Field in Catalytic Combustion Furnace of Natural Gas Longfei Yan1, a, Shihong Zhang2,b 1,2,Beijing Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing university of Civil Engineering and Architecture, China a315230892@qq.com, bshihongzhang@bucea.edu.cn Keywords: catalytic combustion; temperature field; simulation Abstract.
The physical model of natural gas catalytic combustion furnaces was established, furnace was simulated using ANSYS software, and verifying the validity of the simulation through the experimental test data.
Natural gas catalytic combustion furnace is a furnace driven by the natural gas catalytic combustion furnace type IX, in order to determine the concrete placement of firing ceramic and whether meet the requirements of firing ceramic, furnace modeling simulation and tested by experiment, comparative analysis the law within the furnace temperature field .The physical model of furnace was established, concluding that law of internal temperature field in furnace through the experimental test data The Simulation of Temperature Field in Catalytic Combustion Furnace The CFD commercial software ANSYS was used in this simulation in this paper, internal temperature field for furnaces driven by natural gas catalytic furnace was simulated Simulation modeling and parameter The furnace height is 1.8m, length 1 m, width 0.88m, side connections catalytic combustion furnace type IX (3 catalytic furnace), joint welded by iron plate with 12cm width , Wall of furnaces with asbestos insulation layer which
Fig.6 Experimental apparatus Comparison data as shown below: Fig.7 Measuring hole 1 simulation and test data Fig.8 Measuring hole 2 simulation and test data comparison comparison Fig.9 Measuring hole 3 simulation and test data Fig.10 Measuring hole 4 simulation and test data comparison comparison As can be seen by comparison, the simulated temperature is higher than the actual temperature about 100 degrees, but deviation is small compared with the high temperature of furnace chamber, which shows that the simulation results is feasible.
Conclusion The simulation results show that the temperature of the furnace cavity reach the temperature of the firing clay basically, the placement should be in where the temperature is higher, Such as the upper portion of the furnace chamber, the outlet of the furnace, or the place where hot air flow.

The desire of computational fluid dynamists, CFD has long been the possibility to use a unique mathematical formulation together with a unique numerical method to examine the variety of thermo fluid dynamics problems [19, 20].
However, a high capacity equation solving computer software package (EES 1994) has become available, working within personal computer based Windows employing CFD to solve second law problems [9].
B bTa , (8b) where E E t a )( 1 δ = , w w t a )( 1 δ = , ap=ae+aw and b= tSt T Q gen∆+∆ , In this case, the differential equation (8a) is solved by algebraic method of equation (8b), which is the beauty of CFD.
Vallury. 2nd law analysis of sage and CFD- ACE+ Models of MIT Gas Spring and Two-Space Test Rigs, First Year Report, NASA Grant NAG3-2811 Providence, Cleveland, Ohio. 2004
Integration of simulation technology into undergraduate engineering courses and laboratories, ASEE 2003 Annual Conference, Nashville, TN.

Kim (2004)[7] tackled CFD modeling of realistic 4×4 and 5×5 fuel rod channels, showing the power spectrum of the flow.
This was followed by a detailed, fundamental validation of CFD for calculating the forces on a tube in high Reynolds number cross-flow using LES by Kim and Mohan (2005)[8].
In order to easy simulation, if the outer fliud radius is appropriate, the inner fluid can be considered as the additional mass.
Numerical simulation of cross flow induced fluidelastic vibration of tube arrays and comparison with experimental results.
Prediction of unsteady loading on a circular cylinder in high Reynolds number flows using Large Eddy Simulation.

Research Methods FDS+EVAC is a computational fluid dynamics (CFD) software codeveloped by the United States National Institute of Standards and Technology and the VTT Technical Research Centre of Finland.
The simulation case design is shown in Table 2.
Simulation case design Case No.
Evacuation simulation for the base case Table 3.
(Yan) Chen,“Numerical determination and treatment of convective heat transfer coefficient in the coupled building energy and CFD simulation ,” Building and Environment, pp.1001-1009,2005

Initial studies were performed using CFD (ANSYS / Fluid Dynamics).
Finally, the 3-D stall barrier was mounted on a complete model rotor blade and investigated by means of a numerical flow simulation.
Figure 8: Velocity distribution in the cross-section of the stall barrier with flow channel The CFD analysis has shown that the following design parameters have a significant effect on the efficiency of a stall barrier with suction (Fig. 8): • Height of the channel compared to the maximum profile thickness • The "dead water area" in the intake depends on the inlet inclination relative to the free flow of the profile shape and the inner channel form (height, etc
The future flow simulations should also be calculated in transient mode in order to obtain a more accurate result.
References [1] Wittig, S.: Numerical flow simulation of a horizontal axis wind turbine (HAWT) rotor to investigate the potential of improving the operating performance under use of different aerodynamic modifications, cp.max Rotortechnik GmbH & Co.

Introduction This design intends to adopt the research methods which is a combination of theoretical derivation, model analysis and software integrated simulation phase.
The analysis of gas-solid coupling of wind turbine blades In this study, the weak coupling partition solution method is adopted, respectively, computational fluid dynamics (CFD) and computational structural mechanics equations (CSD) equation are solved once in each time.
NS equation solving aerodynamic is simulated by CFD, and is simulated by the dynamic response of structures for joint solving calculations .Structure and flow fields exchange information with each other through the intermediate data platform..
Challenges in Simulation of Aerodynamics, Hydrodynamics and Mooring-Line Dynamics of Floating Offshore Wind Turbines[C],Presented at the 21st International Offshore and Polar Engineering Conference, 19-24 June 2011, Maui, Hawaii
Dynamic overset CFD simulations of wind turbine aerodynamic[J], Renewable Energy 37 (2012) :285-298

Turbulence is one of the key CFD models applied in numerical compartment fire modelling.
However, there exists three different main forms of turbulent simulations that calculate and/or model large and small eddies – Direct Numerical Simulation (DNS), Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES).
Turbulence models in CFD.
Modelling and Simulation in Engineering, Article ID 781252, 16 pages
Toward thelarge-eddy simulation of compressible turbulent flows.

The simulation datas compared with test datas show that under different calculation conditions, head error of the simulation data and experimental data is less than 1%, and the efficiency value of error is less than 5%.
The simulation method can accurately calculate the performance of the pump.
Then we test the sample and compare the test datas with simulations.The datas comparision is shown in fig.7.
Conclusion By studying the following conclusions: (1) we gave a new structual aero fuel centrifugal pump’s design method that inducer and impeller was combined based on combining empirical coefficient method with modern CFD technology, achieving structural parameter optimization and shortening the design cycle time in process
[5] Shen S C.Design and simulation of aero-engine high presssure centrifugal pump:Computer Simulation, Vol. 84-87(2011),p.28:.

Experimental and simulation procedure Figure 1 shows a schematic diagram of a reactor for the high-temperature gas source method.
A commercial software CFD-ACE+ and add-on software CVDSim SiC Edition were used in simulation analyses of growth rates, depending on the seed rotation speed and temperature distributions in the reactor [4,5].
[4] Information on https://www.esi-group.com/software-services/virtual-environment/cfd-multiphy sics/ ace-suite/cfd-ace/

Based on the heat and mass transfer theory and characteristics of the CFD software, a three-dimensional numerical simulation platform had been developed to study the thermal performance in a natural draft wet cooling tower.
Therefore, a three-dimensional numerical simulation platform was developed to study the heat exchange and flow situation of cooling tower.
It uses three dimensional numerical simulation platform is used to simulate the two group working simulations.
The computing values of the simulation platform are found to be in good agreement with the design data.
The simulation platform could provide forceful support to the research of cooling tower.