scholarly journals Energy release process of surrounding rocks of deep tunnels with two excavation methods

2012 ◽  
Vol 4 (2) ◽  
pp. 160-167 ◽  
Author(s):  
Peng Yan ◽  
Wenbo Lu ◽  
Ming Chen ◽  
Zhigang Shan ◽  
Xiangrong Chen ◽  
...  
Keyword(s):  
Energy Release ◽  
Release Process ◽  
Excavation Methods

scholarly journals Research on the Ignition Height and Reaction Flame Temperature of PTFE/Al/Si/CuO with Different Mass Ratios of PTFE/Si

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3464
Author(s):  
Xuan Zou ◽  
Jingyuan Zhou ◽  
Xianwen Ran ◽  
Yiting Wu ◽  
Ping Liu ◽  
...  
Keyword(s):  
Energy Release ◽  
High Speed ◽  
Flame Temperature ◽  
Sintering Process ◽  
Release Process ◽  
Reactive Material ◽  
Temperature Changes ◽  
Release Capacity ◽  
Mass Ratios ◽  
The Relationship

Recent studies have shown that the energy release capacity of Polytetrafluoroethylene (PTFE)/Al with Si, and CuO, respectively, is higher than that of PTFE/Al. PTFE/Al/Si/CuO reactive materials with four proportions of PTFE/Si were designed by the molding–sintering process to study the influence of different PTFE/Si mass ratios on energy release. A drop hammer was selected for igniting the specimens, and the high-speed camera and spectrometer systems were used to record the energy release process and the flame spectrum, respectively. The ignition height of the reactive material was obtained by fitting the relationship between the flame duration and the drop height. It was found that the ignition height of PTFE/Al/Si/CuO containing 20% PTFE/Si is 48.27 cm, which is the lowest compared to the ignition height of other Si/PTFE ratios of PTFE/Al/Si/CuO; the flame temperature was calculated from the flame spectrum. It was found that flame temperature changes little for the same reactive material at different drop heights. Compared with the flame temperature of PTFE/Al/Si/CuO with four mass ratios, it was found that the flame temperature of PTFE/Al/Si/CuO with 20% PTFE/Si is the highest, which is 2589 K. The results show that PTFE/Al/Si/CuO containing 20% PTFE/Si is easier to be ignited and has a stronger temperature destruction effect.

Evaluation of Operation Safety of Energy Release Process of Liquefied Air Energy Storage System

Energy ◽  
2021 ◽  
pp. 121403
Author(s):  
Chang Lu ◽  
Qing He ◽  
Shuangshuang Cui ◽  
Xingping Shi ◽  
Dongmei Du ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Release ◽  
Storage System ◽  
Energy Storage System ◽  
Release Process

scholarly journals MODELLING THE ENERGY RELEASE PROCESS OF AFTERSHOCKS

2017 ◽  
Vol 50 (3) ◽  
pp. 1341
Author(s):  
D. Gospodinov
Keyword(s):  
Stochastic Model ◽  
Energy Release ◽  
Aftershock Sequence ◽  
Suggested Model ◽  
Cumulative Energy ◽  
Release Process ◽  
Aftershock Sequences ◽  
Strain Release ◽  
Loma Prieta ◽  
Benioff Strain

A stochastic model for the study of Benioff strain release during aftershock sequences is suggested. The stochastic model is elaborated after a compound Poisson process and is applied on data of the M7.1 Ocober 18, 1989 Loma Prieta aftershock sequence in northern California, USA. The temporal evolution of the number of events is first modelled by the Restricted Epidemic Type Aftershock Sequence (RETAS) model and then the identified best fit model is incorporated in the energy release analysis. The suggested model is based on the assumptions that there is no relation between the magnitude and the occurrence time of an event first and second, that there is no relation between the magnitude of a certain event and magnitudes of previous events. The obtained results from the examination of the energy release reveal that the suggested model makes a good fit of the aftershock Benioff strain release and enables a more detailed study by identifying possible deviations between data and model. The real cumulative energy release values surpass the expected model ones, which proves that aftershocks, stronger than forecasted by the model, are clustered at the beginning of the Loma Prieta sequence.

scholarly journals Two-stage Energy Release Process of a Confined Flare with Double HXR Peaks

2018 ◽  
Vol 854 (2) ◽  
pp. 178 ◽  
Author(s):  
Hao Ning ◽  
Yao Chen ◽  
Zhao Wu ◽  
Yang Su ◽  
Hui Tian ◽  
...  
Keyword(s):  
Energy Release ◽  
Two Stage ◽  
Release Process

scholarly journals Coronal Response to Energy Release During Solar Flares

1986 ◽  
Vol 7 ◽  
pp. 731-738
Author(s):  
Ester Antonucci
Keyword(s):  
High Resolution ◽  
Energy Release ◽  
Solar Flares ◽  
Solar Maximum ◽  
Impulsive Phase ◽  
Primary Energy ◽  
Release Process ◽  
X Ray ◽  
The Past ◽  
Flare Region

AbstractThe observations obtained with high resolution spectrometers flown in the past solar maximum, in the years 1979-1981, have shown that the soft x-ray plasma during the impulsive phase of solar flares is characterized by upflows. as well as by isotropic flows, at velocities of a few hundred km s-1. Isotropic flows can be directly related to the primary energy release process. While, upflows are an indication of chromospheric material heated to coronal temperatures and evaporating along the magnetic fluxtubes; they are therefore related to the development of the coronal soft x-ray source in the flare region.

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