Results 41 to 50 of about 83 (60)
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A new, friction controlled, piston actuated diaphragmless shock tube driver
Shock Waves, 1999A new friction operated single piston shock tube driver design that is capable of generating shock waves of Mach number 1.1 to 2 is presented. By using different test gases and evacuating the driven section Mach 5 shock waves can easily be produced. The driver is efficient with shock wave Mach numbers within 9% of that predicted by ideal shock tube ...
O.E. Kosing, F.J. Barbosa, B.W. Skews
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Preliminary Study on Diaphragmless Shock Tube for Transonic Airfoil Testing with PDI
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010In the present study, the diaphragmless shock tube is developed for the transonic and the high-subsonic airfoil testing. The flow visualizations of the shock tube as the wind tunnel is performed by the PDI (point diffraction interferometry) technique.
Masashi Kashitani +4 more
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Rapid Opening Valve Assisted by Magnetic Force for a Diaphragmless Shock Tube
2015Recently, ship ballast water has become a threat to marine ecosystems-i.e., the increase in marine creatures carried in ship ballast water to other sea areas causes destruction of marine ecosystems.
A. Abe, K. Sugahara, Y. Yamada
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Development of a Large Diameter Diaphragmless Shock Tube for Gas-Dynamic Laser Studies
Materials Science Forum, 2007This paper reports on the design and performance of a large diameter diaphragmless shock tube that has been recently developed in order to experimentally study various basic characteristics of the gas-dynamic laser (GDL). The main engineering element of the shock tube is a diaphragm-like sliding piston (in place of a rupturing diaphragm) by which ...
I. da S. Rego +7 more
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Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2011
The use of high-velocity sheet-forming techniques where the strain rates are in excess of 10 2 /s can help us solve many problems that are difficult to overcome with traditional metal-forming techniques. In this investigation, thin metallic plates/foils were subjected to shock wave loading in
S R Nagaraja, J K Prasad, G Jagadeesh
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The use of high-velocity sheet-forming techniques where the strain rates are in excess of 10 2 /s can help us solve many problems that are difficult to overcome with traditional metal-forming techniques. In this investigation, thin metallic plates/foils were subjected to shock wave loading in
S R Nagaraja, J K Prasad, G Jagadeesh
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Shock Waves, 1995
A high pressure pulse, which was produced by a shock tube, was hit repeatedly on a pellet of mouse EL-4 T-lymphoma cells packed in a small test tube which was filled up with culture medium. The pressure pulse measured at the conical bottom of the tube had about 30 μs width and up to 8.4 MPa height depending on the driver gas pressure of the shock tube.
Tomohide Hosokawa +2 more
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A high pressure pulse, which was produced by a shock tube, was hit repeatedly on a pellet of mouse EL-4 T-lymphoma cells packed in a small test tube which was filled up with culture medium. The pressure pulse measured at the conical bottom of the tube had about 30 μs width and up to 8.4 MPa height depending on the driver gas pressure of the shock tube.
Tomohide Hosokawa +2 more
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Diaphragmless shock tube with multiple air-operated valves
Experiments in Fluids, 2022Kento Inokuma +3 more
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A Numerical Investigation of the Flow through a New Fast Acting Valve for Diaphragmless Shock Tubes
2015In shock tubes, driver and driven section are usually separated by a diaphragm, which produces nearly ideal shock waves due to its instant rapture. However, known disadvantages of diaphragms motivate the investigation of diaphragmless shock tubes. One of these concepts is to replace a diaphram by a rapidly opening piston.
Manuel Gageik +3 more
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High-Frequency Generation of High-Pressure Pulses Using a Diaphragmless Shock Tube
1995We have developed a high-pressure pulse generator at a high repetitive rate by combining a diaphragmless shock tube with shock strengthening by area convergence. The diaphragmless shock tube generates shock waves with Mach numbers of up to 2 traveling in the tube at atmospheric pressure.
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A New Diaphragmless Shock Tube Facility for Interface Instability and Mach Reflection Studies
1995A new shock tube facility has been constructed in order to help clarify: (i) the exact nature of Mach reflections in density stratified media and (ii) the growth rate of the interfacial instability under forcing by a shock wave. The shock tube is diaphragmless and has two fast-action valves at each end of the driven section, one to create a well ...
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