語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Edge-flames and combustion at the mi...
~
Kessler, David A.
FindBook
Google Book
Amazon
博客來
Edge-flames and combustion at the microscale.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Edge-flames and combustion at the microscale./
作者:
Kessler, David A.
面頁冊數:
176 p.
附註:
Adviser: Mark Short.
Contained By:
Dissertation Abstracts International67-11B.
標題:
Applied Mechanics. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3242893
ISBN:
9780542989124
Edge-flames and combustion at the microscale.
Kessler, David A.
Edge-flames and combustion at the microscale.
- 176 p.
Adviser: Mark Short.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
Numerical studies are performed to examine several phenomena relevant to the dynamic behavior of laminar flames in devices whose critical dimensions are at or below classical quenching limits. The behavior of premixed and nonpremixed edge-flames in tune-periodic counterflows is modeled using a constant-density approximation and a single-step Arrhenius reaction rate. Results of numerical simulations indicate that the unsteady strain rate is generally a destabilizing influence that expands the range of Damkohler numbers for which instabilities occur for small Lewis numbers and affects the quenching limits of edge-flames with a Lewis number of unity. The thermal coupling between the combustion field and conductive burner walls in externally-heated, straight-tube, single-pass microburners is studied numerically for premixed and nonpremixed reactants. The transient dynamics of the premixed flame fronts are controlled by the properties of the wall material. The level of external heat loss dictates the ultimate steady-state behavior, allowing periodic extinction/reignition, stable oscillations, and stationary flames. A new type of "tuning fork" flame structure is formed in nonpremixed microburners clue to the interaction of the thermal layers formed along the heated channel walls with the mixing layer of the reactants. External heat losses cause this flame structure to oscillate. The speed and quenching limits of premixed flames in a thin, nonadiabatic channel calculated using a constant-density model are compared with those obtained using a model that allows density variations due to thermal expansion of the combustion gases. Two-dimensional numerical simulations show that at low levels of heat loss, stretching caused by the thermal-expansion-induced flow causes an increase in flame surface area and propagation speed. However, thermal expansion is shown to facilitate quenching at lower levels of heat loss. Finally, the development of a two-dimensional simulation of the flow in a long, thin channel with side-wall mass injection using the full compressible Navier-Stokes equations is described. Initial results suggest that finite Mach number effects contribute to edge-flame formation when the local Mach number of the flow approaches unity. A pulsating edge-flame is observed for a fuel mixture with Lewis number equal to two.
ISBN: 9780542989124Subjects--Topical Terms:
1018410
Applied Mechanics.
Edge-flames and combustion at the microscale.
LDR
:03215nam 2200277 a 45
001
972714
005
20110928
008
110928s2006 eng d
020
$a
9780542989124
035
$a
(UMI)AAI3242893
035
$a
AAI3242893
040
$a
UMI
$c
UMI
100
1
$a
Kessler, David A.
$3
1296687
245
1 0
$a
Edge-flames and combustion at the microscale.
300
$a
176 p.
500
$a
Adviser: Mark Short.
500
$a
Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6491.
502
$a
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
520
$a
Numerical studies are performed to examine several phenomena relevant to the dynamic behavior of laminar flames in devices whose critical dimensions are at or below classical quenching limits. The behavior of premixed and nonpremixed edge-flames in tune-periodic counterflows is modeled using a constant-density approximation and a single-step Arrhenius reaction rate. Results of numerical simulations indicate that the unsteady strain rate is generally a destabilizing influence that expands the range of Damkohler numbers for which instabilities occur for small Lewis numbers and affects the quenching limits of edge-flames with a Lewis number of unity. The thermal coupling between the combustion field and conductive burner walls in externally-heated, straight-tube, single-pass microburners is studied numerically for premixed and nonpremixed reactants. The transient dynamics of the premixed flame fronts are controlled by the properties of the wall material. The level of external heat loss dictates the ultimate steady-state behavior, allowing periodic extinction/reignition, stable oscillations, and stationary flames. A new type of "tuning fork" flame structure is formed in nonpremixed microburners clue to the interaction of the thermal layers formed along the heated channel walls with the mixing layer of the reactants. External heat losses cause this flame structure to oscillate. The speed and quenching limits of premixed flames in a thin, nonadiabatic channel calculated using a constant-density model are compared with those obtained using a model that allows density variations due to thermal expansion of the combustion gases. Two-dimensional numerical simulations show that at low levels of heat loss, stretching caused by the thermal-expansion-induced flow causes an increase in flame surface area and propagation speed. However, thermal expansion is shown to facilitate quenching at lower levels of heat loss. Finally, the development of a two-dimensional simulation of the flow in a long, thin channel with side-wall mass injection using the full compressible Navier-Stokes equations is described. Initial results suggest that finite Mach number effects contribute to edge-flame formation when the local Mach number of the flow approaches unity. A pulsating edge-flame is observed for a fuel mixture with Lewis number equal to two.
590
$a
School code: 0090.
650
4
$a
Applied Mechanics.
$3
1018410
650
4
$a
Physics, Fluid and Plasma.
$3
1018402
690
$a
0346
690
$a
0759
710
2 0
$a
University of Illinois at Urbana-Champaign.
$3
626646
773
0
$t
Dissertation Abstracts International
$g
67-11B.
790
$a
0090
790
1 0
$a
Short, Mark,
$e
advisor
791
$a
Ph.D.
792
$a
2006
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3242893
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9130971
電子資源
11.線上閱覽_V
電子書
EB W9130971
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入