ENERGY EMISSIONS OF SPARK DISCHARGE UNDER WATER

Thomas Izdebski, Miroslaw Dors, Jerzy Mizeraczyk

Abstract


The recent focus of research with electrohydraulic discharges is on bacteria and microorganism inactivation. The processes and main biocidal effects in which this occurs are not fully understood.  In this paper a study of energy emission from electrohydraulic spark discharge is presented. The spark discharge was generated in a cylindrical reactor 25 mm in diameter made of PTFE between a stainless steel hollow needle electrode and a steel rod electrode. Distilled water was used and the flow was 30 ml/min. The gap between the electrodes was 3 mm. Spark discharge energy was measured to be 1.2-1.4 J. Measurements show that over 50% of this energy is used for heating of the reactor and electrodes, and about 2% for acoustic waves. The rest of the discharge energy, i.e. ~0.54 J, is distributed among UV/Vis radiation, production of primary active species and ultrasonic.

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DOI: http://dx.doi.org/10.17628/ecb.2014.3.811-814

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