My works
Multidimensional simulations of Internal Combustion Engines
My current work at Sygma Motors, where we (cfd team) apply computational fluid dynamics to IC engines development. The company also relies on several experimental facilities such as static bench for head flow equipped with PIV, two research engines with instrumentation and high speed cameras, spray bench for injection system characterization and some other cool things ;)
We’re located at São José dos Campos, in the state of São Paulo, Brazil.
Congresso SAE Brasil 2009
Numerical study of the mixture stratification in an ethanol powered IC engine
(Rodrigo Piccinini, José E S Oliveira and Marcos Langeani)
Stability of Batchelor Vortex
An internship @ LadHyX, which was finished in July 15th (2008), and the report presented for my bachelor degree @ ITA (my university in Brazil) on November 11th (2008).
- Report: Stability and control of a vortex in a time-dependent strain field
- Presentation (diaporama): Presentation
SAE AeroDesign Brazil 2007
SAE AeroDesign competition is intended to develop technical skills in aeronautical and
mechanical engineering, team work and project management.
I was member of HoverGama Team. Here you can see the presentation of our project (portuguese).
Mullite study by luminescent spectroscopy.
Mullite is an important material in aeronautical engines. It shows a great strength even at very high temperatures making it widely used in chamber and hot gases exit. This work aimed to apply the spectroscopy technique in the identification of micro structure in order to predict its mechanical properties. Article in portuguese: www.bibl.ita.br/xiiencita/FUND%2007.pdf
[12]. Also, the fuel vaporization decreases cylinder tem-
perature allowing higher compression ratios and the ab-
The combustion strategy of stratified-charge for a spark-
sence of throttle minimizes pump loss in partial load op-
ignition IC engine (SCSI) aims at providing better con-
eration, improving volumetric efficiency. An extensive dis-
trol of ignition process thus improving operation at partial
cussion of direct injection benefits can be found in [12].
load. This might be achieved by splitting a direct injection
into two stages (being the second stage during compres-
Once the direct injection strategy is chosen, however, sev-
sion stroke) and having an easily ignitable fuel-air stratifi-
eral questions might appear regarding the spray dynamics
cation around the spark plug. The configuration producing
inside the cylinder. Both experimental and numerical ap-
such air-fuel stratification is here concerned for an ethanol
proaches are complex. In what concerns numerical sim-
direct injection system.
ulation, the large range of time and spatial scales that
would be required to fully resolve the physical phenomena
The study was carried out by numerical simulations on
is a key factor. Therefore, a great variety of phenomena
a virtual CFD engine. The spray motion and interaction
must be modeled without losing sight of computational
with the in-cylinder flow was modeled by an Eulerian-
cost. The Eulerian-Lagrangian method seems to offer the
Lagrangian approach. The spray was modeled by a statis-
best trade-off between accuracy in the predictive capabil-
tical distribution relating droplet diameter to volume frac-
ity and computational cost. This method has been proved
tion. The investigated parameters were the amount of fuel
to be the most used numerical model for representation of
in secondary injection and the influence of piston bowl ra-
the spray behavior and became a valuable tool producing
dius in mixture stratification. The results for stratification
predictive and detailed results.
are presented as concentration contour maps and local
probe values. Droplet size after secondary break-up and
fuel vaporization are also concerned as a general evalua-
tion of spray quality.
