The experimental setup. By means of a fast piston mounted on the left, the jet gas is compressed to stagnation pressures ranging from 0.1 to 0.7MPa, and is accelerated by a de Laval nozzle. The jet travels along a vessel filled with the desired ambient gas (at pressures in the 1.5–100 Pa range) and meets an electron sheet. The sheet ionizes the gases and makes a plane section of
the flow visible; these images are acquired by an intensified high-speed CMOS camera.

 The vessel

- Jet generation at the nozzle (movie).

 Underexpanded jet, He/Ar (see movie)

Light jet, helium in xenon, M= 16.1. Density maps: numerical simulations and experimental measurements.

- Higher resolution picture

- movie (numerical simulation)

- movie (experiment)

Heavy jet, Xenon in air, M= 15. Density maps: numerical simulations and experimental measurements.

- Higher resolution picture

- movie (numerical simulation)

- experimental movies (Xe in Ar): original and reworked by means of multicorrelation techniques.

Light jet, numerical simulation.

t = 15 t_jet

(Higher resolution picture)

t = 20 t_jet

(Higher resolution picture)

t = 30 t_jet

(Higher resolution picture)

t = 40 t_jet

(Higher resolution picture)

t = 50 t_jet

(Higher resolution picture)

t = 60 t_jet

(Higher resolution picture)

Large-eddy simulation of an hypersonic jet at M=5. The figure shows the underresolved regions where the small scale indicator f is larger than the threshold 0.4.

For more details refer to CPC (2007) and (2013)

A complete movie of this time evolving jet can be seen here.

Large-eddy simulation of an hypersonic jet at M=5. The figure shows a passive tracer introduced at t=0 in the initially round jet. A complete movie of this time evolving jet can be seen here.

For more details on the simulation refer to CPC (2007) and(2013)

Large-eddy simulation of an hypersonic jet at M=5. The blue contours indicate the fraction of space where sub-filter scales are present, the red lines are the isolines of the streamwise velocity u/u_0.

See movie.