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Nonequilibrium behavior in a flowing...
~
Owano, Thomas Gerald.
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Nonequilibrium behavior in a flowing, atmospheric pressure plasma.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Nonequilibrium behavior in a flowing, atmospheric pressure plasma./
作者:
Owano, Thomas Gerald.
面頁冊數:
134 p.
附註:
Source: Dissertation Abstracts International, Volume: 52-09, Section: B, page: 4940.
Contained By:
Dissertation Abstracts International52-09B.
標題:
Engineering, Mechanical. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9206834
Nonequilibrium behavior in a flowing, atmospheric pressure plasma.
Owano, Thomas Gerald.
Nonequilibrium behavior in a flowing, atmospheric pressure plasma.
- 134 p.
Source: Dissertation Abstracts International, Volume: 52-09, Section: B, page: 4940.
Thesis (Ph.D.)--Stanford University, 1991.
A radio frequency inductively coupled plasma torch has been used to generate flowing atmospheric pressure plasmas. Maximum temperatures and electron densities of approximately 8500 K and 3 Subjects--Topical Terms:
783786
Engineering, Mechanical.
Nonequilibrium behavior in a flowing, atmospheric pressure plasma.
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Nonequilibrium behavior in a flowing, atmospheric pressure plasma.
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Source: Dissertation Abstracts International, Volume: 52-09, Section: B, page: 4940.
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Thesis (Ph.D.)--Stanford University, 1991.
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A radio frequency inductively coupled plasma torch has been used to generate flowing atmospheric pressure plasmas. Maximum temperatures and electron densities of approximately 8500 K and 3
$\
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$
10
$\
sp{15}
$
cm
$\
sp{-3}
$,
respectively have been produced at the exit plane of the torch. Thermal, ionizational, and chemical non-equilibrium occurring as the plasma flows through a controlled reactor are studied.
520
$a
Emission spectroscopy of an argon plasma was performed to examine the thermodynamic and ionizational state of the plasma. Results show that the recombining plasma is in a state of partial-local thermodynamic equilibrium. A partial equilibrium model of the plasma is used to interpret measurements of the volumetric radiative source strength of argon in the temperature range from 5000 to 8500 K.
520
$a
A non-equilibrium computational model of the flowing argon plasma was written to simulate the evolution of the plasma state from the entrance of the reactor to its exit. By accurately modeling the non-equilibrium properties of the plasma, such as radiative losses, radiative transport, electron diffusion, thermal conductivity, and finite rate electron recombination, agreement between measured and modeled reactor exit conditions was achieved. The electron-ion three body recombination rate inferred from this comparison was found to be approximately three times larger than values previously reported in the literature.
520
$a
Chemical non-equilibrium in the boundary layer of a substrate placed in an argon-hydrogen-methane plasma was used to synthesize diamond particles and films on molybdenum and silicon substrates. A parametric study of substrate temperature and methane/hydrogen feed ratio was performed. It was found that the substrate temperature range over which diamond growth occurred shifted towards higher temperature as the methane/hydrogen feed ratio was increased. The growth rate was found to reach a maximum with varying methane/hydrogen ratio at a constant substrate temperature. This peak growth rate was observed to shift slightly towards a higher methane/hydrogen ratio with increasing substrate temperature. Raman analysis of the deposits indicates that higher quality, well faceted diamond is achieved at the highest limits of substrate temperature for a given methane/hydrogen feed ratio. Comparison of growth rates for a flat plate boundary layer geometry were made with a two-dimensional reacting boundary layer code, and a sensitivity of the growth rate to the atomic hydrogen surface recombination rate was found.
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9206834
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