Variational problems of radiative gas dynamics in the presence of gas injection from a surface

1988 ◽  
Vol 30 (3) ◽  
pp. 384-388
Author(s):  
N. N. Pilyugin ◽  
L. A. Prokopenko
Keyword(s):  
Gas Dynamics ◽  
Gas Injection ◽  
Variational Problems

scholarly journals Formation of the Upstream Region in HV Gas Blast Interrupters with Synchronous Gas Injection

2019 ◽  
Vol 6 (1) ◽  
pp. 43-46 ◽  
Author(s):  
N. K. Kurakina ◽  
V. Ya. Frolov ◽  
E. N. Tonkonogov
Keyword(s):  
Gas Dynamics ◽  
Electrical Contact ◽  
Gas Injection ◽  
Upstream Region ◽  
Font Size ◽  
Circuit Breakers ◽  
Nozzle Throat ◽  
Flow Interactions ◽  
Calculation Results ◽  
Current Zero

The problem of a synchronous gas injection at the vicinity of current zero for high voltage gas blast circuit breakers~(GCB) is discussed. The basic aim of the investigation is to improve the efficiency of arc quenching in GCB by increasing interruption ability without changes in drive parameters. The paper reviews the upstream region influence on the interruption capability, gas injection - mass flow interactions at the region between electrical contact and nozzle throat of GCB. <br />Numerical simulation is used to calculate gas--dynamics parameters at the upstream region of mono--flow GCB. The mass discharged as a result of the synchronous gas injection can rapidly modify both the density and pressure at the nozzle throat, regulate flow velocity in the research region. The selected method of the gas injection effects the breaking performance in the arc quenching device strongly. Some calculation results are presented.<br /><p class="western" style="margin-top: 0.1cm; margin-bottom: 0.1cm; line-height: 100%;"> </p><!-- p { margin-bottom: 0.25cm; direction: ltr; color: rgb(0, 0, 10); line-height: 120%; text-align: left; }p.western { font-family: "Liberation Serif", serif; font-size: 12pt; }p.cjk { font-family: "Noto Sans CJK SC Regular"; font-size: 12pt; }p.ctl { font-family: "FreeSans"; font-size: 12pt; } -->

The formulation of variational problems of gas dynamics

1963 ◽  
Vol 27 (1) ◽  
pp. 269-272 ◽  
Author(s):  
V.M. Borisov ◽  
Iu.D. Shmyglevskii
Keyword(s):  
Gas Dynamics ◽  
Variational Problems

Supernovae and interstellar gas dynamics

1967 ◽  
Vol 31 ◽  
pp. 117-119
Author(s):  
F. D. Kahn ◽  
L. Woltjer
Keyword(s):  
Lower Limit ◽  
High Velocity ◽  
Gas Dynamics ◽  
Interstellar Cloud ◽  
Interstellar Gas ◽  
Random Motions ◽  
Relativistic Particles

The efficiency of the transfer of energy from supernovae into interstellar cloud motions is investigated. A lower limit of about 0·002 is obtained, but values near 0·01 are more likely. Taking all uncertainties in the theory and observations into account, the energy per supernova, in the form of relativistic particles or high-velocity matter, needed to maintain the random motions in the interstellar gas is estimated as 1051·4±1ergs.

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