How to simulate detonation wave in a cylindrical duct? please give me some idea. I am new to fluent.

Actually, until now, i made geometry of the cylindrical duct, generated the mesh and checked it in fluent for its validity. the mesh is ok. The inlet condition is 1 bar, 288K and i am suposed to use fuel as Hydrogen and Oxygen. Does fluent has all these chemical reaction details within it? How should i use them?

my CJ temperature is found to be 3600K.

now i need to give the boundary condition, select the solver and test it. please guide me with suitable boundary condition and solvers. I dont see much information pertaining to detonation simulation in fluent.

should i simulate shock wave first and then go for chemistry? please explain how to simulate shock wave too. I tried with boundary condition of inlet=10 bar and exit=1 bar but the cylindrical duct did not show any shock wave propagation during transiet simulation.

please help. thanks in advance

[Radu]

Hi Krish
Have you managed to find a solution for your problem yet? I also study the problem of hydrogen detonation in a closed-end cylinder. I have never thought to use Fluent... I now try to elaborate a code, in Fortran, using the method of characteristics, but is a LOT of work. Since I need a solution for the problem relatively quick, I'm thinking to use Fluent. I see that your post is rather old, and maybe you've already found a solution. Could you please contact me if you wish to exchange information about the topic? I would appreciate that. Thank you. Radu

[vikram]

Hello Radu & Krish,

I am working on the same thing as well. Maybe we can collaborate our efforts in Fluent to make progress? Please get back to me.

Thanks.

Vikram.

[ssixr]

hi i am also working in pulse detonation engine area...trying to simulate detonation...can u help me?
thank you

[stumpy]

An explicit (in time) solver is usually the code of choice for detonation. Have you looked at ANSYS AUTODYN?

[ssixr]

thank u stumpy...i ll chk out autodyn and post my comments..thank u

[ssixr]

hello stumpy
thanks for your help..for flame propagation transient model should be used.i have another doubt, how to fill a tank(2d model) with a any fluid/premixed mixture.? any help.?
truly
sudhir

[mrwan]

i tried to simulate pulse combustion but i confuse about what the code can be used for the simulation

[mrwan]

my project is pulse combustion i want to ask anyone work on this area to help select program to simulate and suitable boundry condition

[ssixr]

hi mrwan,

Can you explain your scenario little bit more or specific?

Regards,
Sudhir

[mrwan]

i used transient flow ,the BC, is mass flow inlet for air,mass of fuel and sin-wave pressure at outlet to oscillate the flow and solve it by pressure based simple
but not satisfy the results

[ssixr]

Reduce time step...

[mrwan]

Tnaks ssixr for reply
but i v new problem where the combustion stop after one time and ido not know
what the next conduct to coniue the pulse combustion?
Pls help

[mrwan]

THIS my last modeling but can not continu the series of combustion

[ssixr]

How is the combustion for first iteration? what are your initial conditions?

[mrwan]

sorry for late
my initial cond is 0 atm pressure with ch4 mixture with air