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
An experimental and numerical study ...
~
Zhang, Hai.
FindBook
Google Book
Amazon
博客來
An experimental and numerical study of the effects of heat loss and unsteadiness on laminar strained flames.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
An experimental and numerical study of the effects of heat loss and unsteadiness on laminar strained flames./
作者:
Zhang, Hai.
面頁冊數:
189 p.
附註:
Source: Dissertation Abstracts International, Volume: 60-06, Section: B, page: 2915.
Contained By:
Dissertation Abstracts International60-06B.
標題:
Engineering, Mechanical. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9933695
ISBN:
0599345578
An experimental and numerical study of the effects of heat loss and unsteadiness on laminar strained flames.
Zhang, Hai.
An experimental and numerical study of the effects of heat loss and unsteadiness on laminar strained flames.
- 189 p.
Source: Dissertation Abstracts International, Volume: 60-06, Section: B, page: 2915.
Thesis (Ph.D.)--University of Southern California, 1999.
A combined experimental and detailed numerical study was conducted on the effects of heat loss and unsteadiness on strained laminar flames at normal- and microgravity. Results are of interest to a variety of fundamental combustion phenomena including flammability limits. Furthermore, valuable information is provided in the context of turbulent combustion for conditions under which the flamelet concept is applicable. The majority of previous studies on flamelets have been focused on steady and adiabatic conditions, even though unsteadiness and heat loss are inherently present in any realistic flowfield. The experiments included the use of the opposed-jet and single-jet configurations in which the strain rate is a well-defined and well-controlled parameter. Velocity measurements were conducted through the use of laser Doppler velocimetry at normal-gravity and extinction strain rates. The counterflow technique was also introduced in micro-gravity through an involved experimental apparatus that allowed for the study of extinction of near-limit flames under conditions that could not be assessed in normal-gravity. The C-shape response of the extinction strain rate vs equivalence ratio was quantified for Le < 1 flames by assuring that upstream heat losses were not present. For Le > 1 flames, a monotonic response was found. Experiments were also conducted at normal-gravity on the effect of downstream heat loss on the propagation and extinction of laminar strained premixed flames. The effect of monochromatic velocity unsteadiness was experimentally studied for non-premixed strained flames and theoretically derived scaling arguments were confirmed. Furthermore, the flames were found to resist to extinction at high frequencies, confirming again theoretical predictions. The experiments were modeled by using detailed description of chemical kinetics, molecular transport, and thermal radiation. The effect of various radiation models on the flame response was assessed. Such models included the assumptions of optically thin and optically thick limits, as well as the mean Planck mean absorption coefficient and detailed narrow-band formulations.
ISBN: 0599345578Subjects--Topical Terms:
783786
Engineering, Mechanical.
An experimental and numerical study of the effects of heat loss and unsteadiness on laminar strained flames.
LDR
:03131nmm 2200289 4500
001
1849430
005
20051203075246.5
008
130614s1999 eng d
020
$a
0599345578
035
$a
(UnM)AAI9933695
035
$a
AAI9933695
040
$a
UnM
$c
UnM
100
1
$a
Zhang, Hai.
$3
1291614
245
1 3
$a
An experimental and numerical study of the effects of heat loss and unsteadiness on laminar strained flames.
300
$a
189 p.
500
$a
Source: Dissertation Abstracts International, Volume: 60-06, Section: B, page: 2915.
500
$a
Adviser: Fokion N. Egolfopoulos.
502
$a
Thesis (Ph.D.)--University of Southern California, 1999.
520
$a
A combined experimental and detailed numerical study was conducted on the effects of heat loss and unsteadiness on strained laminar flames at normal- and microgravity. Results are of interest to a variety of fundamental combustion phenomena including flammability limits. Furthermore, valuable information is provided in the context of turbulent combustion for conditions under which the flamelet concept is applicable. The majority of previous studies on flamelets have been focused on steady and adiabatic conditions, even though unsteadiness and heat loss are inherently present in any realistic flowfield. The experiments included the use of the opposed-jet and single-jet configurations in which the strain rate is a well-defined and well-controlled parameter. Velocity measurements were conducted through the use of laser Doppler velocimetry at normal-gravity and extinction strain rates. The counterflow technique was also introduced in micro-gravity through an involved experimental apparatus that allowed for the study of extinction of near-limit flames under conditions that could not be assessed in normal-gravity. The C-shape response of the extinction strain rate vs equivalence ratio was quantified for Le < 1 flames by assuring that upstream heat losses were not present. For Le > 1 flames, a monotonic response was found. Experiments were also conducted at normal-gravity on the effect of downstream heat loss on the propagation and extinction of laminar strained premixed flames. The effect of monochromatic velocity unsteadiness was experimentally studied for non-premixed strained flames and theoretically derived scaling arguments were confirmed. Furthermore, the flames were found to resist to extinction at high frequencies, confirming again theoretical predictions. The experiments were modeled by using detailed description of chemical kinetics, molecular transport, and thermal radiation. The effect of various radiation models on the flame response was assessed. Such models included the assumptions of optically thin and optically thick limits, as well as the mean Planck mean absorption coefficient and detailed narrow-band formulations.
590
$a
School code: 0208.
650
4
$a
Engineering, Mechanical.
$3
783786
650
4
$a
Engineering, Chemical.
$3
1018531
650
4
$a
Engineering, Aerospace.
$3
1018395
690
$a
0548
690
$a
0542
690
$a
0538
710
2 0
$a
University of Southern California.
$3
700129
773
0
$t
Dissertation Abstracts International
$g
60-06B.
790
1 0
$a
Egolfopoulos, Fokion N.,
$e
advisor
790
$a
0208
791
$a
Ph.D.
792
$a
1999
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9933695
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
W9198944
電子資源
11.線上閱覽_V
電子書
EB
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