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yang zhenya November 14, 2000 06:00

two types of coal combustion
 
Does anyone know how to simulate two types of pulveried coal combustion in a furnace? They come into the furnace from different inlets.I appreciate your help very much.

Judy Cooper November 24, 2000 14:41

Re: two types of coal combustion
 
Hello Yang:

Which CFX software are you using ?

The CFX-Tascflow software from AEA Technology can do this with as many coal inlets as you would like. Pulverized coals are defined as Lagrangian particles that devolatilize and burn as they travel through the combustor.

The coal devolatilization period is described by a vaporization curve for the volatiles. Different coal properties can be entered as percent volatiles and char fraction to simulate higher or lower rank coals. Char and volatiles burn and the particle mass is reduced accordingly. Volatile combustion chemistry can be defined using Arrhenius kinetics, flamelet mechanisms or simple eddy dissipation (mixed-is-burnt) models. Information on chemical species, flow dynamics, coal particle sizes and coal particle trajectories is available from the post-processor.

If you are interested in learning more about the CFX Tascflow software, contact Paul MacDonald at AEA Technology. His email is paulmac@asc.on.ca, phone (519) 886-8435 x 288

Hope this helps,

Judy

yang zhenya November 26, 2000 21:48

Re: two types of coal combustion
 
Hi,Judy I am using CFX4.3 now,anyway,Thank you for the help.

Jan Rusås November 28, 2000 07:55

Re: two types of coal combustion
 
Hi Yang,

I imagine that you can use the USRPBC routine, where you can specify the massfraction of ash, volatiles etc. for each particle track on different patches. Hope it helps Regards Jan


yang zhenya December 3, 2000 23:38

Re: two types of coal combustion
 
Thank you very much.Jan

fengwei December 12, 2000 07:56

I am a beginner!!!
 
Hello! EVERY ONE ! I AM A NEW USER OF CFX4 AND CFX5, BUT I don't know how to start my work with these software. How can I do first???

Gert-Jan van der Gulik December 13, 2000 06:49

Re: I am a beginner!!!
 
Try the manual that is on your desk on your right hand side. Or maybe it is on your left hand side but you have to check that. I can't see it from here.

John C. Chien December 13, 2000 13:33

Re: I am a beginner!!!
 
(1). Well, I really like your answer. (2). I think, he is new to the code. He is not yet a new user. (3). If that's the case, he might not have the set of manuals at all. (4). It would be helpful to sign up the beginner's class first. Contact the vendor to see if they provide such training in your city.

fengwei December 16, 2000 19:15

Re: I am a beginner!!!
 
I am happy to see your answer!!! I am doing as what you'v said. In fact,I come to use the cfx(4 and 5)only for three month ,and I get the manual from others recently(last Friday).This is the second time that I come to the cfx forum,and I want to be a new number of yours. thanks!!

Dan Williams December 20, 2000 00:57

Re: I am a beginner!!!
 
CFX-5 is pretty straightforward to use. What exactly are you trying to do? I'd suggest doing all the tutorials in CFX-5 to get a feel for how it works. The user documentation comes "on-line" with the software. You can get at it from the launcher.


dinesh December 21, 2000 08:09

Re: I am a beginner!!!
 
Sir, i want to know about the upwind sheme.(what is the significance)

Here i have my second query: If i want to code for a rotating machinery,how to incorporate the stationary frame with rotating frame.(EG: Pbm related to the cavitation in a hydraulic turbine...here we've the rotating component as turbine runner and the stationary component as the inlet of the turbine) pls do me favour. thank you

dinesh December 21, 2000 08:13

reg:rotatiing frame of reference
 
Sir, i want to know about the upwind sheme.(what is the significance)

Here i have my second query: If i want to code for a rotating machinery,how to incorporate the stationary frame with rotating frame.(EG: Pbm related to the cavitation in a hydraulic turbine...here we've the rotating component as turbine runner and the stationary component as the inlet of the turbine) pls do me favour. thank you

O' December 23, 2000 03:20

Re: reg:rotatiing frame of reference
 
pls check the CFX manul. The example "TPP-Unsteady simmulation of a Francis Runner flow"may be helpful.


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