MHD effects in continuous spin detonation

Conversion possibility of the chemical energy of combustion products of a hydrogen–oxygen mixture into electrical energy with the use of continuous spin detonation has been demonstrated for the first time in an MHD system. The specific conductivity of detonation products in the region of rotation of the detonation front was measured to be ~3 · 10–2 Ω–1 m–1. The structure of transverse detonation waves was examined, their velocity was measured (2220 ± 50 m/s), and the flow in their vicinity was studied.

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SPECIFIC IMPULSES FOR CONTINUOUS DETONATION OF METHANE/HYDROGEN-AIR MIXTURES

NONEQUILIBRIUM PROCESSES. Vol. 2. Fundamentals of combustion ◽

10.30826/nepcap2018-2-24 ◽

2020 ◽

Author(s):

F. A. BYKOVSKII ◽

◽

S. A. ZHDAN ◽

E. F. VEDERNIKOV ◽

◽

...

Keyword(s):

Specific Impulse ◽

Detonation Waves ◽

Continuous Spin Detonation ◽

Continuous Spin ◽

Transverse Detonation Waves ◽

Flow Type ◽

Continuous Detonation ◽

Multifront Detonation

Regimes of continuous spin detonation (CSD) with transverse detonation waves (TDWs) are obtained in a flow-type annular cylindrical combustor DK-500 for fuel-air mixtures (FAMs) with two compositions of the binary fuel CH4 + 8H2 and CH4 +4H2. Regimes of continuous multifront detonation (CMD) with colliding TDWs are obtained for the FAM with the CH4 + 2H2 binary fuel. These regimes are characterized by significant irregularity of the TDW structure and by a comparatively low TDW velocity. Specific impulses in continuous detonation are determined and analyzed for different compositions of the methane/hydrogen binary fuel. The maximum measured values of the specific impulse at the combustor exit are approximately 3800 s in CSD of CH4 + 8H2 and CH4 + 4H2, 3200 s in CMD of CH4 + 2H2, and 1600 s in combustion of CH4 + H2.

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Melting Point of Carbon Particles behind the Gas Detonation Front

Siberian Journal of Physics ◽

10.25205/2541-9447-2021-16-2-59-70 ◽

2022 ◽

Vol 16 (2) ◽

pp. 59-70

Author(s):

E. S. Prokhorov

Keyword(s):

Melting Point ◽

Detonation Front ◽

Molar Fraction ◽

Experimental Studies ◽

Oxygen Mixture ◽

Detonation Products ◽

Gas Detonation ◽

Nanoscale Particles ◽

Carbon Particles ◽

Carbon Condensate

A mathematical model of gas detonation of fuel-enriched mixtures of hydrocarbons with oxygen has been formulated, which makes it possible to numerically study the equilibrium flows of detonation products in the presence of free carbon condensation. Reference data for graphite were used to describe the thermodynamic properties of carbon condensate. The calculations are compared with the known results of experimental studies in which, when detonating an acetylene-oxygen mixture in a pipe closed at one end, it is possible to obtain nanoscale particles from a carbon material with special properties. It is assumed that the melting point of such a material is lower than that of graphite and is about 3100 K. Only with such an adjustment of the melting temperature, the best agreement (with an accuracy of about 3 %) was obtained between the calculated and experimental dependence of the detonation front velocity on the molar fraction of acetylene in the mixture.

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