東華大學圖書館 |

語系: 繁體中文

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

FindBook

Google Book

Amazon

博客來

Dynamics and Statistics of Cellular Instability in Laminar and Turbulent Expanding Flames.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Dynamics and Statistics of Cellular Instability in Laminar and Turbulent Expanding Flames./
作者:	Liu, Zirui.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	144 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
標題:	Aerospace engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28719370
ISBN:	9798460487202

Dynamics and Statistics of Cellular Instability in Laminar and Turbulent Expanding Flames.
Liu, Zirui.

Dynamics and Statistics of Cellular Instability in Laminar and Turbulent Expanding Flames. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 144 p.

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--Princeton University, 2021.

This item must not be sold to any third party vendors.

This dissertation consists of a series of studies on the dynamics and statistics of the cellular instability in both laminar and turbulent expanding flames. First of all, local quantities including the flame-induced velocity, curvature and strain rates of the cellularly-unstable laminar expanding flames have been measured for the first time to our knowledge. The statistics of these quantities and their relations with the global flame propagation have been investigated. Then, the flow field induced by the cellularly-unstable laminar expanding flames has been further processed to address the hypothesis of self-turbulization. The flow field near the unstable flamefront exhibits turbulence-like characteristics, and a power-law scaling relation in the energy spectra of tangential velocities on the flamefront have been discovered. It is demonstrated theoretically that such scaling relation is caused by the fractal nature of the wrinkled flame surface. Next, in light of the knowledge of cellular instability in laminar expanding flames, the effects of cellular instability in turbulent expanding flames have been studied thereafter. A scaling analysis has been conducted to show the interaction between Darrieus-Landau instability and turbulence in different regimes of the turbulent flame regime diagram. The turbulent flame speeds have also been measured in these regimes to validate the scaling analysis. Furthermore, the effect of the diffusional-thermal instability has also been investigated experimentally. It is shown that Darrieus-Landau instability controls the flame acceleration, while diffusional-thermal instability affects the magnitude of the flame speed. Next, the local statistics of the turbulent cellularly-unstable expanding flames in the corrugated flamelet regime have been studied, and the interaction between cellular instability and turbulence are assessed based on the statistics of the strain rates, the curvature and the surface spectra.

ISBN: 9798460487202Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

Cellular instability

Dynamics and Statistics of Cellular Instability in Laminar and Turbulent Expanding Flames.
LDR:03184nmm a2200385 4500 001 2349856
005 20221010063640.5
008 241004s2021 ||||||||||||||||| ||eng d
020 $a 9798460487202
035 $a (MiAaPQ)AAI28719370
035 $a AAI28719370
040 $a MiAaPQ $c MiAaPQ
100 1 $a Liu, Zirui. $3 3689279
245 1 0 $a Dynamics and Statistics of Cellular Instability in Laminar and Turbulent Expanding Flames.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 144 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
500 $a Advisor: Law, Chung K.
502 $a Thesis (Ph.D.)--Princeton University, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a This dissertation consists of a series of studies on the dynamics and statistics of the cellular instability in both laminar and turbulent expanding flames. First of all, local quantities including the flame-induced velocity, curvature and strain rates of the cellularly-unstable laminar expanding flames have been measured for the first time to our knowledge. The statistics of these quantities and their relations with the global flame propagation have been investigated. Then, the flow field induced by the cellularly-unstable laminar expanding flames has been further processed to address the hypothesis of self-turbulization. The flow field near the unstable flamefront exhibits turbulence-like characteristics, and a power-law scaling relation in the energy spectra of tangential velocities on the flamefront have been discovered. It is demonstrated theoretically that such scaling relation is caused by the fractal nature of the wrinkled flame surface. Next, in light of the knowledge of cellular instability in laminar expanding flames, the effects of cellular instability in turbulent expanding flames have been studied thereafter. A scaling analysis has been conducted to show the interaction between Darrieus-Landau instability and turbulence in different regimes of the turbulent flame regime diagram. The turbulent flame speeds have also been measured in these regimes to validate the scaling analysis. Furthermore, the effect of the diffusional-thermal instability has also been investigated experimentally. It is shown that Darrieus-Landau instability controls the flame acceleration, while diffusional-thermal instability affects the magnitude of the flame speed. Next, the local statistics of the turbulent cellularly-unstable expanding flames in the corrugated flamelet regime have been studied, and the interaction between cellular instability and turbulence are assessed based on the statistics of the strain rates, the curvature and the surface spectra.
590 $a School code: 0181.
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Energy. $3 876794
650 4 $a Thermodynamics. $3 517304
653 $a Cellular instability
653 $a Combustion
653 $a Expanding flame
653 $a Flame propagation
653 $a Self-turbulization
653 $a Turbulent flame speed
690 $a 0538
690 $a 0791
690 $a 0348
710 2 $a Princeton University. $b Mechanical and Aerospace Engineering. $3 2102828
773 0 $t Dissertations Abstracts International $g 83-05B.
790 $a 0181
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28719370