Pressure measurement by Fast-Response Piezo-Sensors during Continuous Spin Detonation in the Combustor
F. A. Bykovskii, S. A. Zhdan, E. F. Vedernikov, A. N. Samsonov, A. I. Sychev, A. E. Tarnaikin
Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: непрерывная спиновая детонация, угольно-воздушная смесь, вихревая радиальная камера, пьезоэлектрические датчики давления, continuous spin detonation, coal-air mixture, radial vortex chamber, piezo-electric pressure sensors
Abstract
Pressure profiles in a transverse detonation wave propagating in a plane-radial vortex chamber during continuous spin detonation of a mixture consisting of lignite, syngas, and air are measured by specially designed and fabricated high-frequency pressure sensors based on TsTS-19 piezo-ceramics. Pressure levels in the detonation wave front relative to the mean static pressure are determined. It is demonstrated that these levels decrease toward the combustor center (by a factor of 20 and lower) as the wave intensity (velocity) decreases. Pressure oscillations behind the wave front testify to a complex gas-dynamic pattern of the processes in the wave region. A chemical reaction region is detected behind the wave front; its length is approximately 8% of the period between the waves.
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