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Shock Waves

, Volume 24, Issue 6, pp 603–618

First Online: 25 July 2014Received: 05 December 2011Revised: 14 March 2014Accepted: 28 June 2014

Abstract

The paper describes experimental studies of detonation initiation in a kerosene–oxidizer mixture in a short test tube. The aim of the study is to determine the minimum diameter of the tube and the minimum level of energy that enables direct initiation of the detonation. Knowledge about these values will inform the design of a jet engine combustion chamber in which thermal energy will be generated by a rotating detonation process. The test tube and the oxidizer inside the tube were heated using specially designed heaters installed outside of the tube. The heated oxidizer provided thermal conditions similar to the conditions for a compressor with small to medium static pressure. The study was conducted for four different tube diameters and for various energies of initiation. As a result, measurements of pressure waveforms were obtained for various cases of fuel injection, which were then compared against the results of the shock wave generated by the initiator. This study provides a value for the energy the pressure of the mixture in the initiator, which provided direct initiation of detonation for a kerosene–oxidizer mixture. Different tube diameters led to the initiation of detonation for various oxygen–nitrogen compositions as an oxidizer.

KeywordsDetonation initiation Rotating detonation Combustion chamber Communicated by N. N. Smirnov and E. Timofeev.

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Autor: J. Kindracki

Fuente: https://link.springer.com/



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