A novel concept to generate miniature shockwaves in a safe, repeatable, and controllable manner in laboratory confinements using an in situ oxyhydrogen generator has been proposed and demonstrated. This method proves to be more advantageous than existing methods because there is flexibility to vary strength of the shockwave, there is no need for storage of high pressure gases, and there is minimal waste disposal. The required amount of oxyhydrogen mixture is generated using alkaline electrolysis that produces hydrogen and oxygen gases in stoichiometric quantity. The rate of oxyhydrogen mixture production for the newly designed oxyhydrogen generator is found to be around 8 ml/s experimentally. The oxyhydrogen generator is connected to the driver section of a specially designed 10 mm square miniature shock tube assembly. A numerical code that uses CANTERA software package is used to predict the properties of the driver gas in the miniature shock tube. This prediction along with the 1-D shock tube theory is used to calculate the properties of the generated shockwave and matches reasonably well with the experimentally obtained values for oxyhydrogen mixture fill pressures less than 2.5 bars. The miniature shock tube employs a modified tri-clover clamp assembly to facilitate quick changing of diaphragm and replaces the more cumbersome nut and bolt system of fastening components. The versatile nature of oxyhydrogen detonation-driven miniature shock tube opens up new horizons for shockwave-assisted interdisciplinary applications.
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August 2016
Research Article|
August 16 2016
Development of a novel miniature detonation-driven shock tube assembly that uses in situ generated oxyhydrogen mixture
S. Janardhanraj
;
S. Janardhanraj
Department of Aerospace Engineering,
Indian Institute of Science
, Bangalore 560012, India
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G. Jagadeesh
G. Jagadeesh
a)
Department of Aerospace Engineering,
Indian Institute of Science
, Bangalore 560012, India
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
Rev. Sci. Instrum. 87, 085114 (2016)
Article history
Received:
April 19 2016
Accepted:
August 01 2016
Citation
S. Janardhanraj, G. Jagadeesh; Development of a novel miniature detonation-driven shock tube assembly that uses in situ generated oxyhydrogen mixture. Rev. Sci. Instrum. 1 August 2016; 87 (8): 085114. https://doi.org/10.1063/1.4960961
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