Observation of Supersonic Jet Using Small Volume High-Pressure Shock Tube

2018 ◽  
Vol 910 ◽  
pp. 143-148
Author(s):  
Ryohei Takemura ◽  
Hiroshi Fukuoka ◽  
Shinichi Enoki ◽  
Shigeto Nakamura ◽  
Kazuki Hiro
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Shock Tube ◽  
Small Volume ◽  
Supersonic Jet ◽  
Pressure Chamber ◽  
High Pressure Chamber ◽  
Schlieren Method ◽  
Background Oriented Schlieren Method ◽  
Background Oriented Schlieren

The unsteady supersonic jet and the shock wave injected by the small volume shock tube are experimentally studied in this paper. The experimental was performed by the background oriented schlieren method. The main parameters for the jet are the pressure ratio by the high pressure chamber/ a back pressure 10.9-53.0 and the length of high pressure chamber/diameter ratio 1 and 10. The velocity of the shock wave and supersonic jet were estimated by using the principle of the background oriented schlieren method. The results showed that the influence of the length of the high pressure chamber on the velocity of the jet.

INVESTIGATION OF PROCESSES IN THE HIGH-PRESSURE CHAMBER OF SHOCK TUBE

2020 ◽  
Author(s):  
N. G. Bykova ◽  
◽  
I. E. Zabelinsky ◽  
P. V. Kozlov ◽  
Yu. V. Tunik ◽  
...  
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Shock Tube ◽  
High Energy ◽  
Pressure Chamber ◽  
High Pressure Chamber ◽  
Shock Tubes ◽  
The World

There are several installations with shock tubes in the world, in which a shock wave in air propagates at a speed close to the second cosmic one. Such velocities are achieved by supplying of high energy (~ 1 MJ) to the pushing gas in the high-pressure chamber.

505 Study of Unsteady Supersonic Jet using Shock Tube with Small High-Pressure Chamber

2008 ◽  
Vol 2008.21 (0) ◽  
pp. 213-214
Author(s):  
Hiroshi FUKUOKA ◽  
Hideki MINE ◽  
Minoru YAGA ◽  
Shoichi MATSUDA ◽  
Toshio TAKIYA
Keyword(s):  
High Pressure ◽  
Shock Tube ◽  
Supersonic Jet ◽  
Pressure Chamber ◽  
High Pressure Chamber

E06 Study of Unsteady Supersonic Jet using Shock Tube with Small High-Pressure Chamber

2008 ◽  
Vol 2008 (0) ◽  
pp. 173-174
Author(s):  
Hideki MINE ◽  
Minoru YAGA ◽  
Hiroshi FUKUOKA ◽  
Shoichi MATSUDA ◽  
Toshio TAKIYA
Keyword(s):  
High Pressure ◽  
Shock Tube ◽  
Supersonic Jet ◽  
Pressure Chamber ◽  
High Pressure Chamber

Study of Unsteady Supersonic Jet Using Shock Tube with Small High-Pressure Chamber with Elliptical Cell

2013 ◽  
Vol 767 ◽  
pp. 80-85 ◽  
Author(s):  
Motoki Sakamoto ◽  
Masazumi Matsui ◽  
Hiroshi Fukuoka ◽  
Minoru Yaga ◽  
Toshio Takiya
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Laser Ablation ◽  
Shock Tube ◽  
Static Pressure ◽  
Focal Point ◽  
Supersonic Jet ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
High Pressure Chamber

The unsteady supersonic jet formed by the shock tube with small high-pressure chamber was used as a simple alternative model of Pulsed laser ablation. Since the pressure of the shock wave formed by Pulsed laser ablation is very high, the interaction between the shock wave and the plume is important for the formation of nanoparticles especially under high background gas pressure. An elliptical cell is used for controlling the shock wave. The shock wave discharged in one focal point converge another focal point. Numerical calculation was carried out by solving the axisymmetric two-dimensional compressible Navier-Stokes equations. The wall static pressure monitored at the center of substrate is used to evaluate the influence of the shape and the pressure ratio on the behavior of the shock wave, the plume, and their interaction. As a result, it was found that the vortex ring was generated downstream of the cell, which is followed by the discharging shock wave from the cell exit. It was also found that the influence of the vortex ring on the wall static pressure at the center of the substrate.

Small High-Pressure Chamber Shock Tube

2012 ◽  
Author(s):  
Hiroshi Fukuoka ◽  
Minoru Yaga ◽  
Toshio Takiya
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Shock Tube ◽  
Flat Plate ◽  
Stokes Equations ◽  
Pressure Ratio ◽  
Supersonic Jet ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Simple Alternative

The unsteady supersonic jet formed by the shock tube with small high-pressure section was used as a simple alternative system of pulsed laser ablation. The dynamic of the supersonic jet impinging upon a flat plate are discussed by comparing experimental and calculated results. The experiment and numerical calculation were carried out by schlieren method and by solving the axisymmetric two-dimensional compressible Navier-Stokes equations, respectively. The main parameters are distance between the open end of the shock tube and the flat plate, L/D, and the pressure ratio of the shock tube, Ph/Pb. Where, L, D, Ph and Pb are the distance between the open end of the shock tube and the flat plate, the diameter of the shock tube, pressure of the high and low section of the shock tube, respectively. Collision between the shock wave reflected at the flat plate and the head of supersonic jet takes place. Computational results well predict the experimental dynamic behavior of the shock wave and the supersonic jet. Marked increase in the static pressure on the flat plate under high Ph/Pb and short L/D is observed due to interaction between the shock wave and the unsteady jet flow.

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