CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   AVL FIRE (http://www.cfd-online.com/Forums/avl-fire/)
-   -   simulation Dual Fuel engine with AVL FIRE (http://www.cfd-online.com/Forums/avl-fire/98722-simulation-dual-fuel-engine-avl-fire.html)

Hoursfer March 17, 2012 06:37

simulation Dual Fuel engine with AVL FIRE
 
hi
I have been using AVL Fire v2010.1. I have done investigation of DI dual fuel engine that fuled with natural gas and diesel inject into cylinder but i dont now how to insert fuels in solver tree.when i define fules into "Multi-Component" in "Initial Condition" segment, together diesel & natural gas insert into cylinder in the first moment whereas i intend to diesel is injected into the compressed air & natural gas mixture. please tell me how to do that?thanks

hkoten May 12, 2012 21:18

Hi Hoursfer,

you simulate on linux or windows which one.

avlcfd September 14, 2012 09:02

Hoursfer, I suppose you like to simulate a Diesel ignited gas engine, where as the gas is pre-mixed. If so, specify the gas in the initial conditions and the Diesel in the spray module. Select the right ignition model too.

Actually this is a simplified approach. Doing so will cause the injected Diesel evaporating on the gas species. If teh amount of Diesel being injected is small that approach works fine.

yanjl123 January 15, 2013 01:24

Quote:

Originally Posted by avlcfd (Post 381795)
Hoursfer, I suppose you like to simulate a Diesel ignited gas engine, where as the gas is pre-mixed. If so, specify the gas in the initial conditions and the Diesel in the spray module. Select the right ignition model too.


Is it necessary to select a ignition model,and which ignition model should I select?

santoso_lipi January 28, 2013 07:22

You could select Diesel Ignited Gas Engine as ignition model

yanjl123 January 28, 2013 11:10

Quote:

Originally Posted by santoso_lipi (Post 404484)
You could select Diesel Ignited Gas Engine as ignition model


What else parameters should are necessary for this ignition model ? I can not select Diesel Ignited Gas Engine as ignition model, something must be wrong.

-Phil- January 28, 2013 11:49

Hi yanjl123,

the DIESEL vapors to CH4. That's because FIRE can only handle one fuel at the same time. As avlcfd said, thats the best approch at the moment.

In the "Diesel ignited gas engine" - Ignition model try the setting "automatic" for the fuel mass fraction limit. This gives quite reliable results for a first run.

yanjl123 January 28, 2013 11:55

The problem is although the Diesel Ignited Gas Engine button seems selectable, I can't select it.

-Phil- January 28, 2013 12:15

Hi yanjl123,

i guess you try to combine the ECFM-3Z with the Diesel ignited gas engine - ignition model.

For a Diesel ignited gas engine simulation use the ECFM.

santoso_lipi January 28, 2013 20:33

yanjl123,

Diesel Ignited Gas Engine works with ECFM or EBU combustion model

JoshS. March 13, 2013 23:01

Hi, i am trying to simulate a dual fuel engine as well but i couldnt seem to get Diesel Ignited Gas Engine to work with ECFM. when i start the simulation a few seconds after it stops. Need Help. :confused:

sophew March 17, 2013 02:52

why my FIRE simulation appear this error:%fire-F-cyispra, You specified a fuel that is not supported! can you help me ? i choose the natural gas and diesel and they are both in the fuel database. and i think maybe i set the wrong number of the index scalar ? i set the two both 1.

Karthikeya March 28, 2013 09:49

i can help you contact me 9912194512
 
I can help you . But not on line. message me ur mobile no. or e mail id. we wil be in touch with that. where are you from.

superflame July 8, 2013 03:27

Quote:

Originally Posted by yanjl123 (Post 404547)
The problem is although the Diesel Ignited Gas Engine button seems selectable, I can't select it.


hi yanjl123,

Have you solved your problem? i am doing the same simulation with yours. i found i can onlu use "Diesel Ignieted Gas Engine Model" with ECFM when using FIRE 2008 not FIRE 2010.

Another question: i defined the CH4 in the initial condition and diesel in the spray. But the simulation results show there is no diesel during the cycle and what injected into the cylinder is just CH4. Is there anyway to solve this problem?

best regards,

Super


All times are GMT -4. The time now is 23:47.