Diaphragmless shock wave generators for industrial applications of shock waves
- 272 Downloads
The prime focus of this study is to design a 50 mm internal diameter diaphragmless shock tube that can be used in an industrial facility for repeated loading of shock waves. The instantaneous rise in pressure and temperature of a medium can be used in a variety of industrial applications. We designed, fabricated and tested three different shock wave generators of which one system employs a highly elastic rubber membrane and the other systems use a fast acting pneumatic valve instead of conventional metal diaphragms. The valve opening speed is obtained with the help of a high speed camera. For shock generation systems with a pneumatic cylinder, it ranges from 0.325 to 1.15 m/s while it is around 8.3 m/s for the rubber membrane. Experiments are conducted using the three diaphragmless systems and the results obtained are analyzed carefully to obtain a relation between the opening speed of the valve and the amount of gas that is actually utilized in the generation of the shock wave for each system. The rubber membrane is not suitable for industrial applications because it needs to be replaced regularly and cannot withstand high driver pressures. The maximum shock Mach number obtained using the new diaphragmless system that uses the pneumatic valve is 2.125 ± 0.2%. This system shows much promise for automation in an industrial environment.
KeywordsDiaphragmless shock tube Shock waves Diaphragmless shock wave generators Diaphragmless drivers
Unable to display preview. Download preview PDF.
- 1.Jagadeesh, G.: Industrial applications of shock waves. In: Proceedings of IMechE, Part G, J. Aerospace Engg, pp. 575–583 (2008)Google Scholar
- 2.Jagadeesh, G.: Application of shockwaves in pencil manufacturing industry. In: Proceedings of the 26th international symposium on shock waves, Göttingen, Germany. Part XI, pp. 847–850 Springer Berlin Heidelberg (2009)Google Scholar
- 3.Yang J., Onodera O., Takayama K.: Design and performance of quick opening shock tube using rubber membrane for weak shock wave generation. JSME B. 60(570), 473–478 (1994)Google Scholar
- 6.Ikui T., Matsuo K., Yamamoto Y.: Fast-acting valves for use in shock tubes: part 1, Construction and their characteristics. JSME. 40(141), 337–342 (1977)Google Scholar
- 7.Ikui T., Matsuo K., Yamamoto Y.: Fast-acting valves for use in shock tubes: part 2, formation of shock waves. JSME. 22(167), 693–699 (1979)Google Scholar
- 9.Bredin M.S., Skews B.W.: Drag measurement in unsteady compressible flow, part1: an unsteady flow facility and stress wave drag balance. R&D J. The South Afr. Instit. Mech. Engg. 23(1), 3–12 (2007)Google Scholar
- 10.Ikui T., Matsuo K.: Investigations of the aerodynamic characteristics of the shock tubes (part 1, the effects of tube diameter on the tube performance), (part 2, on the formation of shock waves). JSME. 12(52), 774–792 (1969)Google Scholar
- 11.Gaydon A.G., Hurle I.R.: The shock tube in high-temperature chemical physics. Chapman and Hall, London (1963)Google Scholar