Experimental research into the influence of two­spark ignition on the deflagration to detonation transition process in a detonation tube

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.175333

Keywords:

detonation tube, multifocal ignition, deflagration to detonation transition, spark ignition

Abstract

The paper reports a study into the initiation of detonation in pulse detonation engines. The chosen direction to resolve this issue is the use of detonation tubes with multifocal ignition. We applied two spark discharges as a source of ignition, which ignited synchronously. The spark discharges were ignited at a distance, which provided for the intensive gas-dynamic interaction between the discharges. The interaction implied a collision between shock waves generated by the spark discharges. As a result, the growth in temperature of gas was ensured in the region between spark intervals, due to a collision between the oncoming shock waves.

The influence of dual spark ignition on the time and length of the section where deflagration transfers into detonation along a detonation tube was studied by comparing the transition parameters for cases of single-spark and dual spark ignition all other conditions for research being equal. The study involved a detonation tube with a length of 2.3 m and an inner diameter of 22 mm. Spark plugs were located at the closed end of the tube. We applied a stoichiometric mixture of propane with oxygen, diluted with nitrogen by 50 % at the initial pressure in the mixture equal to 50 kPa. To register the time of propagation of the flame front and to measure the process rate, the tube was equipped with 22 ionization sensors. Distance between the sources of ignition was 6 mm. Length of the discharge interval at each source of ignition was 2.5 mm. Sources of ignition in the form of spark plugs were connected to high-voltage units with a total discharge energy of 3.3 J.

The results of our study helped establish a reduction in the distance of deflagration to detonation transition by 1.6…2 times, and in the time of transition ‒ from 3.9 ms to 1.2 ms for the case of the transition from single-spark to dual spark ignition.

The results obtained could be used when designing ignition systems for pulse detonation engines.

Author Biographies

Kostyantyn Korytchenko, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Doctor of Technical Sciences, Senior Researcher

Department of Applied Electrical Engineering

Pavel Krivosheyev, A. V. Luikov Heat and Mass Transfer Institute of NAS of Belarus Brovki str., 15, Minsk, Belarus, 220072

PhD

Physical-Chemical Hydrodynamics Lab

Dmytro Dubinin, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD

Department of Fire Tactics and Rescue Operations

Andrii Lisniak, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD, Associate Professor

Department of Fire Tactics and Rescue Operations

Kostiantyn Afanasenko, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD

Department of Fire and Technogenic Safety of Facilities and Technologies

Serhii Harbuz, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD

Department of Fire and Technogenic Safety of Facilities and Technologies

Olga Buskin, University of Greenwich Old Royal Naval College, Park Row, London

PhD

Built Environment Department

Andriy Nikorchuk, National Academy of National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD

Scientific and Research Center of Service and Military Activities

Ivan Tsebriuk, National Academy of National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD

Department of Operation and Repair of Cars and Combat Vehicles

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Published

2019-08-09

How to Cite

Korytchenko, K., Krivosheyev, P., Dubinin, D., Lisniak, A., Afanasenko, K., Harbuz, S., Buskin, O., Nikorchuk, A., & Tsebriuk, I. (2019). Experimental research into the influence of two­spark ignition on the deflagration to detonation transition process in a detonation tube. Eastern-European Journal of Enterprise Technologies, 4(5 (100), 26–31. https://doi.org/10.15587/1729-4061.2019.175333

Issue

Vol. 4 No. 5 (100) (2019): Applied physics

Section

Applied physics

License

Copyright (c) 2019 Kostyantyn Korytchenko, Pavel Krivosheyev, Dmytro Dubinin, Andrii Lisniak, Kostiantyn Afanasenko, Serhii Harbuz, Olga Buskin, Andriy Nikorchuk, Ivan Tsebriuk

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