Deflagration-to-detonation transition under initiation by high-voltage nanosecond discharges

Rakitin, Aleksandr; Жуков, В. В.; Starikovskii, Andrei

doi:10.1051/eucass/200901367

Cited by 1 publication

(2 citation statements)

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“…In previous experiments the authors used microsecond discharges for internal initiation of the propulsive main discharge and could already increase the MPC operation pressure from 30 to 250 Torr (0.33 bar), see Figure 2a-2c [13]. The use of nanosecond discharge was the next logical step which was also motivated by the fact that in experiments to chemical pulse detonation engines distributed or transient nanosecond spark discharges are significantly more efficient for detonation initiation than localized microsecond spark discharges of comparable pulse energy [17]. So high repetition nanosecond pulsed discharge are already in the focus of groups working on efficient combustion processes for several years [18], though no working group has obviously ever combined the nanosecond know-how with pinching dense plasma focus discharges.…”

Section: Motivationmentioning

confidence: 99%

“…A nanosecond (ns) high voltage pulse generator (NPG-18/3500N, Megaimpulse Ltd, Russia) is used to induce a homogeneous, transient discharge for internal MPC excitation. High-frequency nanosecond pulse discharges have the unique property to induce transient self-organization of plasma channels between the electrodes[16,17], seeFigure 4a-4c. The transient ns-discharge is driven by -15 kV, 3.5 kHz pulses with 4 ns rise time and 10-20 ns pulse length for all test pressures.…”

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confidence: 99%

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First Breakthrough for Future Air-Breathing Magneto-Plasma Propulsion Systems

Göksel¹,

Mashek

2017

J. Phys.: Conf. Ser.

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A new breakthrough in jet propulsion technology since the invention of the jet engine is achieved. The first critical tests for future air-breathing magneto-plasma propulsion systems have been successfully completed. In this regard, it is also the first time that a pinching dense plasma focus discharge could be ignited at one atmosphere and driven in pulse mode using very fast, nanosecond electrostatic excitations to induce self-organized plasma channels for ignition of the propulsive main discharge. Depending on the capacitor voltage (200-600 V) the energy input at one atmosphere varies from 52-320 J/pulse corresponding to impulse bits from 1.2-8.0 mNs. Such a new pulsed plasma propulsion system driven with one thousand pulses per second would already have thrust-to-area ratios (50-150 kN/m²) of modern jet engines. An array of thrusters could enable future aircrafts and airships to start from ground and reach altitudes up to 50km and beyond. The needed high power could be provided by future compact plasma fusion reactors already in development by aerospace companies. The magneto-plasma compressor itself was originally developed by Russian scientists as plasma fusion device and was later miniaturized for supersonic flow control applications. So the first breakthrough is based on a spin-off plasma fusion technology.

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confidence: 99%

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confidence: 99%