Major
research interests in our group lie in computational fluid dynamics
(CFD) and fluid mesurements to understand and predict the complicated
fluid system, such as aerodynamic problems of space transportation
systems. Our main research activities may be classified into
the following three categories:
(1)Computational fluid dynamics
(2)Fluid mesurements
(3)Contribution to the projects of ISAS/JAXA
Computational
fluid dynamics
The CFD technology
has been rapidly developed in last thirty years, and it has
been applied for the various engineering problems. Our main
research interest of CFD application is aerodynamic problem
of the space transportation systems. The objectives in the studies
are the clalification of the flow structures and to provide
the useful information for the improvements of aerodynamic performance
and so on.
While,
we're also comprehensively working on the studies for the improvements
of the CFD technology, such as high-resolution schemes for aeroacoustics
problem and the LES/RANS hybrid method for the massive separated
flows. The right figure shows the computed flowfield over thin-airfoil
at stall condition by using hybrid method.
Futhermore, our reseach area is expanding to cover the multidisciplinary
problems and the optimization problems. Numerical analysis tools
have been established and applied to many engineering problems,
for example wing-flutter problem and optimization of the flight
path of TSTO space vehicle.
Fluid
mesurements
We also are conducting
an experiment to establish measurement system using PSP and
investigate fluid dynamic phenomena by PSP. The use of PSP makes
it possible to visualize pressure distribution on total surface
of model. While combine an oil flow and a schlieren photo, the
PSP becomes useful tool for fluid dynamic problem around model.
The right figure shows surface pressure distribution on Euler
model, and indicates vortex and shock wave.
Contribution
to the projects of ISAS/JAXA
There are various scientific projects in ISAS/JAXA, our
group contributes to the these projects in terms of aeroadynamic
analysis.
� Study on rolling moment characteristics of M-V rocket (right
figure)
� CFD analysis of the pressure variation inside the nose-faring
of M-V rocket in ascent
・ CFD analysis of the flow structure in the nozzle of SRB(Solid
Rocket Booster) with the throat scar
Computational
fluid dynamics
