detonation wave simulation
 

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

Pulse detonation
 

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

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.

to radu,
 

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

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

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

detonation
 

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

pulse jet
 

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

pulse combustion
 

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

hi mrwan,

Can you explain your scenario little bit more or specific?

Regards,
Sudhir

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

Reduce time step...

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

My modelinf
 

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

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

my initial
 

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