Conventionally driven high-Z metal shell implosion, with a large radius (a few centimeters) and a low DT gas pressure (∼ 10−5 g/cm), is calculated by one dimensional radiation hydrodynamics to find the fusion ignition energy. Calculation shows, with sufficiently high driving pressure and the right amount of fusion fuel, a volume ignition like fusion process can be initiated, at a ignition tempe...

Original scientific paper This paper discusses the risks of ignition sources of electric motors in areas at risk of explosive atmospheres. The basis for this work is research on the occurrence of the source of ignition resulting from an induction motor rotor cage fault. The research was targeted at the heating effects on the rotor cage of the "Ex e" type of protection motor, as a result of diff...

engine performance depends on two main factors of engine speed and ignition time. ignition timing can affect engine life, fuel economy and engine power. in this paper, to study engine performance of peugeot 206 tu3a with comparison ratio of 10.5:1 and displacement of 1361cc in matlab software, a two-zone burned/unburned model with the fuel burning rate described by awiebe function was used for ...

A study of the ignition of non-fire-resistant hydraulic fluid sprays was conducted by the National Institute for Occupational Safety and Health. Both an open flame and a hot steel surface were used as the external heat sources. With the open flame as the heat source, the minimum oil temperature and minimum spray nozzle pressure that resulted in an ignition were measured. The effects of the dist...

We present hybrid PIC simulations of fast electron transport and energy deposition in pre-compressed fusion targets, taking full account of collective magnetic effects and the hydrodynamic response of the background plasma. Results on actual ignition of an imploded fast ignition configuration are shown accounting for the increased beam divergence found in recent experiments [J.S. Green et al., ...

Extending on a companion paper in this colloquium, the dispersion, ignition and combustion characteristics of aluminum particle clouds is investigated numerically behind reflected shock waves. It is observed that a higher proportion of the Al cloud by mass burns for a higher initial cloud concentration. Vorticity from the cloud wake and from that deposited by the reflected shock cause the parti...

The present study addresses the problem of ignition of a single sodium droplet, which is an important issue for the nuclear facilities safety. The study follows the approach of previous works and extends the results of those papers to the case of radiative heat loss. The contribution of the thermal radiation is taken into account based on the P-1 approximation for thermal radiation transfer. An...

Energy deposition of MeV electrons in dense plasmas, critical for fast ignition in inertial confinement fusion (ICF), is modeled analytically. It is shown that classical stopping and scattering dominate electron transport and energy deposition when the electrons reach the dense plasmas in the cores of compressed targets, while “anomalous” stopping associated with self-generated fields and micro...

68 LLE Review, Volume 86 Introduction The central goal of direct-drive implosions on the OMEGA laser1 is to validate the performance of the high-gain, directdrive ignition designs2 planned for use on the National Ignition Facility. Inferring the density, temperature, and fuel–shell mix of ignition-relevant capsule implosions is important in validating models of implosions. To this end, diagnost...