Direct initiation of detonation in a hydrogen-oxygen mixture diluted with nitrogen

1993 ◽  
Vol 27 (6) ◽  
pp. 873-876 ◽  
Author(s):  
V. A. Levin ◽  
V. V. Markov ◽  
S. F. Osinkin
Keyword(s):  
Oxygen Mixture ◽  
Direct Initiation

scholarly journals Детонация горючего газового цилиндра при фокусировке падающей ударной волны

2019 ◽  
Vol 45 (23) ◽  
pp. 43
Author(s):  
П.Ю. Георгиевский ◽  
В.А. Левин ◽  
О.Г. Сутырин
Keyword(s):  
Mach Number ◽  
Bubble Diameter ◽  
Strong Shock ◽  
Detonation Initiation ◽  
Oxygen Mixture ◽  
Two Dimensional ◽  
Propane Combustion ◽  
Dimensional Interaction ◽  
Direct Initiation ◽  
Heavy Gas

Two-dimensional interaction of a shock in air with elliptic area (two-dimensional gas bubble) filled with propane-oxygen mixture with addition of heavy gas is numerically studied using Euler’s equations. Propane combustion is modeled with one-stage Arrhenius kinetics. Three different ignition regimes are found: direct detonation initiation by sufficiently strong shock, detonation near the triple point formed during weaker shock refraction and detonation at the focusing point of even weaker shock. The latter regime is observed only for significantly elongated bubbles. Detonation initiation regime dependence on shock Mach number and bubble diameter ratio is determined. It is shown that due to bubble elongation, critical Mach number may be significantly lowered in comparison with direct initiation.

Intensive care of a complicated form of asthmatic status (clinical case)

2019 ◽  
Vol 2 (31) ◽  
pp. 46-51
Author(s):  
D. A. Temerov ◽  
L. V. Vorobyova ◽  
S. V. Vyzhevsky ◽  
S. B. Savchenkov ◽  
Yu. V. Marchenkov
Keyword(s):  
Clinical Case ◽  
Mixture Distribution ◽  
Severe Pneumonia ◽  
Control Mode ◽  
Respiratory Support ◽  
Oxygen Mixture ◽  
Bronchial Obstruction ◽  
Optimal Regime ◽  
Pulmonary Barotrauma ◽  
Airway Patency

The article presents a clinical case of successful treatment of a patient with prolonged asthmatic status. The pathogenesis of purulent-septic and other life-threatening complications developing as a result of the above critical condition is described. The positive effect of a differentiated approach in conducting respiratory support depending on the stage of the disease is justified: at the beginning, when airway obstruction is in the foreground, and in the future, when restrictive respiratory disorders develop. When conducting respiratory support, the most reasonable methods for ensuring airway patency were selected. The necessity of neurovegetative blockade and myoplegia for the prevention of pulmonary barotrauma during respiratory support by aggressive ventilation modes and with the goal of antihypoxic protection of the brain is emphasized. During the treatment of the patient, it was confirmed that the optimal regime for obstruction of the bronchi is forced volume-cyclic ventilation of the lungs to provide the necessary minute volume of breathing, and in severe pneumonia, in the case of relief of bronchial obstruction, respiratory support is carried out in pressure control mode for better air-oxygen mixture distribution in the airways. The need for early tracheostomy and daily therapeutic fibrobronchoscopy to ensure airway patency and treat pneumonia has been confirmed.

New Method of Extracorporeal Blood Treatment by Ozone and Oxygen Mixture

2016 ◽  
Vol 48 (6) ◽  
pp. 9-21
Author(s):  
Andrey V. Kipenskiy ◽  
Evgeniy I. Nazarov ◽  
Tatyana А. Glukhenkaya
Keyword(s):  
New Method ◽  
Oxygen Mixture ◽  
Extracorporeal Blood

THE ROLE OF BUBBLE PULSATIONS IN PROCESSES OF GENERATION OF THRUST PULSES FOR WATER MOVERS

2020 ◽  
Author(s):  
V. S. Teslenko ◽  
◽  
A. P. Drozhzhin ◽  
R. N. Medvedev ◽  
◽  
...  
Keyword(s):  
Thrust Force ◽  
Oxygen Mixture

The results of experiments on measurements of pulses of thrust force and bubble pulsations generated on a flat thrust wall due to combustion of a stoichiometric propane-oxygen mixture are presented.

Investigation of the laboratory model of a thruster with anode layer operating with air and nitrogen-oxygen mixture

2021 ◽  
Author(s):  
D. V. Dukhopelnikov ◽  
V. A. Riazanov ◽  
S. O. Shilov ◽  
D. S. Manegin ◽  
R. A. Sokolov
Keyword(s):  
Oxygen Mixture ◽  
Laboratory Model ◽  
Anode Layer

Pattern and mechanism of airway response to hypocapnia in normal subjects

1979 ◽  
Vol 47 (1) ◽  
pp. 8-12 ◽  
Author(s):  
C. F. O'Cain ◽  
M. J. Hensley ◽  
E. R. McFadden ◽  
R. H. Ingram
Keyword(s):  
Vital Capacity ◽  
Normal Subjects ◽  
Oxygen Mixture ◽  
Flow Volume ◽  
Mixture Density ◽  
Lung Capacity ◽  
Airway Constriction ◽  
Maximal Expiratory Flow ◽  
Airway Response ◽  
Expiratory Flow

We examined the bronchoconstriction produced by airway hypocapnia in normal subjects. Maximal expiratory flow at 25% vital capacity on partial expiratory flow-volume (PEFV) curves fell during hypocapnia both on air and on an 80% helium- 20% oxygen mixture. Density dependence also fell, suggesting predominantly small airway constriction. The changes seen on PEFV curves were not found on maximal expiratory flow-volume curves, indicating the inhalation to total lung capacity substantially reversed the constriction. Pretreatment with a beta-sympathomimetic agent blocked the response, whereas atropine pretreatment did not, suggesting that hypocapnia affects airway smooth muscle directly, not via cholinergic efferents.

Modeling of an Air Bag Inflator Based on Combustion of Methane-Oxygen Mixture

2000 ◽  
Vol 151 (1) ◽  
pp. 73-103 ◽  
Author(s):  
YACOOB TABANI ◽  
MOHAMED E. LABIB
Keyword(s):  
Oxygen Mixture ◽  
Air Bag
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