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
On the use of plasma for shock wave ...
~
Bivolaru, Daniel.
FindBook
Google Book
Amazon
博客來
On the use of plasma for shock wave mitigation.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
On the use of plasma for shock wave mitigation./
作者:
Bivolaru, Daniel.
面頁冊數:
98 p.
附註:
Source: Dissertation Abstracts International, Volume: 63-02, Section: B, page: 0888.
Contained By:
Dissertation Abstracts International63-02B.
標題:
Engineering, Aerospace. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3042006
ISBN:
0493555021
On the use of plasma for shock wave mitigation.
Bivolaru, Daniel.
On the use of plasma for shock wave mitigation.
- 98 p.
Source: Dissertation Abstracts International, Volume: 63-02, Section: B, page: 0888.
Thesis (Ph.D.)--Polytechnic University, 2002.
An experimental study on the influence of on-board generated plasma on shock waves structures and blunt body aerodynamics in a supersonic flow is presented. A slender physical spike, axially protruding forward, was used as the cathode for on-board discharge to generate plasma in front of a 60° truncated cone-cylinder (used as the anode) immersed in a Mach 2.5 non-ionized flow. Measurements of the discharge current and voltage, as well as of the flow pressure and temperature at the surface of the object were performed. Simultaneous shadow/Schlieren and plasma glow imaging techniques were used for flow visualization and characterization. It is found that plasma generated in front of the model had a very significant effect upon the shock wave structure when the slender spike had a proper aspect ratio. A change from a detached bow shock to a tip attached conical shock wave was observed. This is equivalent to a favorable increase by about 70% in the body aspect ratio, from a blunt body to a conical one, as also evidenced by the pressure changes. In each discharge, which lasted about 40 msec, the energy consumed was about 150 J. The frontal pressure dropped by more than 30%, while the pressure on the cone surface of the model increased only by about 5%. The importance of the aspect ratio rather than the discharge power on the observed phenomenon suggests that the thermal effect (induced by the plasma) on the shock wave structure is minimal. In front of the model, the plasma glow distribution did not follow the newly formed conical shock wave pattern, but rather a conical shape of much smaller angle starting at the spike tip. Plasma effects upon the flow aerodynamics around the model, including changes and transformations of the boundary layer and expansion waves, were also investigated through the plasma afterglow intensity distribution. The reported experiments demonstrates that the influence of a small physical spike on the body aerodynamics can be greatly improved by generating plasma around it to form a plasma aero-spike.
ISBN: 0493555021Subjects--Topical Terms:
1018395
Engineering, Aerospace.
On the use of plasma for shock wave mitigation.
LDR
:02913nmm 2200277 4500
001
1810227
005
20040126131507.5
008
130610s2002 eng d
020
$a
0493555021
035
$a
(UnM)AAI3042006
035
$a
AAI3042006
040
$a
UnM
$c
UnM
100
1
$a
Bivolaru, Daniel.
$3
1899848
245
1 0
$a
On the use of plasma for shock wave mitigation.
300
$a
98 p.
500
$a
Source: Dissertation Abstracts International, Volume: 63-02, Section: B, page: 0888.
500
$a
Adviser: Spencer P. Kuo.
502
$a
Thesis (Ph.D.)--Polytechnic University, 2002.
520
$a
An experimental study on the influence of on-board generated plasma on shock waves structures and blunt body aerodynamics in a supersonic flow is presented. A slender physical spike, axially protruding forward, was used as the cathode for on-board discharge to generate plasma in front of a 60° truncated cone-cylinder (used as the anode) immersed in a Mach 2.5 non-ionized flow. Measurements of the discharge current and voltage, as well as of the flow pressure and temperature at the surface of the object were performed. Simultaneous shadow/Schlieren and plasma glow imaging techniques were used for flow visualization and characterization. It is found that plasma generated in front of the model had a very significant effect upon the shock wave structure when the slender spike had a proper aspect ratio. A change from a detached bow shock to a tip attached conical shock wave was observed. This is equivalent to a favorable increase by about 70% in the body aspect ratio, from a blunt body to a conical one, as also evidenced by the pressure changes. In each discharge, which lasted about 40 msec, the energy consumed was about 150 J. The frontal pressure dropped by more than 30%, while the pressure on the cone surface of the model increased only by about 5%. The importance of the aspect ratio rather than the discharge power on the observed phenomenon suggests that the thermal effect (induced by the plasma) on the shock wave structure is minimal. In front of the model, the plasma glow distribution did not follow the newly formed conical shock wave pattern, but rather a conical shape of much smaller angle starting at the spike tip. Plasma effects upon the flow aerodynamics around the model, including changes and transformations of the boundary layer and expansion waves, were also investigated through the plasma afterglow intensity distribution. The reported experiments demonstrates that the influence of a small physical spike on the body aerodynamics can be greatly improved by generating plasma around it to form a plasma aero-spike.
590
$a
School code: 0179.
650
4
$a
Engineering, Aerospace.
$3
1018395
650
4
$a
Physics, Fluid and Plasma.
$3
1018402
690
$a
0538
690
$a
0759
710
2 0
$a
Polytechnic University.
$3
1249856
773
0
$t
Dissertation Abstracts International
$g
63-02B.
790
1 0
$a
Kuo, Spencer P.,
$e
advisor
790
$a
0179
791
$a
Ph.D.
792
$a
2002
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3042006
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
W9170965
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