AVBc  AVBP Combustion Computation

Author : Bénédicte Cuenot, CERFACS  cuenot@cerfacs.fr
Objectives :
The objective of this project is to compute reacting flows and to observe
propagating flames. The unstructured flower solver AVBP
of CERFACS is used. The final goal is the simulation of a flame attached
to a bluff body. Combustion introduces delicate numerical complexities,
and the following steps will be followed:

Simulation of a onedimensional premixed flame: conservation equations,
initialization, boundary conditions, stability, influence of the chemistry,
etc. In particular the laminar flame speed will be computed and compared
to the theoretical value.

Simulation of the inert flow around a bluff body: After defining the geometry,
a mesh will be generated and the cold flow calculated. Particular attention
will be put on the influence of the boundary conditions and the pressure
control.

Simulation of a flame developing behind a bluff body: An initialisation
procedure will have to be defined. Again particular attention will be put
on boundary conditions. The influence of the chemical parameters will be
studied and used to define different regimes.
Working plan :

AVBc.1 : Introduction to the AVBP flow solver, execution of a simple test
case.

AVBc.2 : Onedimensional flame calculation.

AVBc.3 : Twodimensional cold flow calculation.

AVBc.4 : Simulation of a flame developing behind a bluff body.
Week

1

2

3

4

5

6

AVBc.1

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AVBc.2


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AVBc.3



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AVBc.4





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Exam 





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Deliverables :

1. Laminar flame speed.

2. Pressure and velocity fields.

3. Temperature and velocity fields, reaction rate contours. Comparison
with the onedimensional flame.
Bibliography :

[1] The AVBP User's Manual, T. Schönfeld, CERFACS, 1999.

[2] Cours de FORTRAN77/90.
Pedagogical interest :
Introduction to some CFD problems of reacting flows, getting familiar with
unstructured data format.
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