Measurement of pressure behind a detonation wave front in a heterogeneous gas-film system
Knowledge of the magnitude and profile of the pressure behind a detonation wave front is required for an understanding of the nature of detonation, of the wave structure, and of the processes in the reaction zone. In this paper, the author continues a study of the reaction zone structure and wave processes behind the detonation wave front in a gas-film system. The experiments were done with hexadecane, decane and kerosene with oxygen pressures from 0.2 to 1 atm. The shadowgraphs showed that over the whole range of pressure in the heterogeneous hexadecane-oxygen system the detonation front is either practically flat or has a slight smooth curvature. In the decane-oxygen system, the vapor phase of the fuel has an effect. The spin and multi-front detonation regimes are realized in a gaseous mixture. Detonation in heterogeneous kerosene-oxygen systems is usually spin detonation. A detailed pressure field pattern for spin detonation is given. It is found that a previous model for spin detonation is not confirmed by the experimental data. The detonation propagation is stationary rather than fluctuating. In a pipe, rotating compression waves exist behind the detonation front in a gas-film system which accelerate the burnup of the fuel and distort the leading shock front and the presence of a small amount of fuel vapor in a heterogeneous system aids the buildup of autooscillations. Shock-acoustic waves in which the shock jump is preceded by a smooth pressure rise were observed and transverse acoustic or shock-acoustic waves in a heterogeneous reaction zone increase the pressure at the walls.
- Research Organization:
- Novosibirsk
- OSTI ID:
- 6635619
- Journal Information:
- Combust., Explos. Shock Waves (Engl. Transl.); (United States), Vol. 19:1; Other Information: Trans. from Fizika Goreniya, Uzyrua, Vol. 19, No. 1, pp. 105-111, Jan 1983
- Publisher:
- 1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
GASES
DETONATIONS
SHOCK WAVES
PRESSURE MEASUREMENT
CONFIGURATION
DECANE
FILMS
HEXADECANE
KEROSENE
LOW PRESSURE
PRESSURE GRADIENTS
ROTATION
WAVE PROPAGATION
ALKANES
FLUIDS
FUELS
HYDROCARBONS
LIQUID FUELS
MOTION
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry