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Cinema particle image velocimetry in...
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Upatnieks, Ansis.
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Cinema particle image velocimetry investigation of turbulent jet flame stabilization.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Cinema particle image velocimetry investigation of turbulent jet flame stabilization./
作者:
Upatnieks, Ansis.
面頁冊數:
197 p.
附註:
Co-Chairs: Steven L. Ceccio; James F. Driscoll.
Contained By:
Dissertation Abstracts International63-07B.
標題:
Engineering, Aerospace. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3058068
ISBN:
0493736875
Cinema particle image velocimetry investigation of turbulent jet flame stabilization.
Upatnieks, Ansis.
Cinema particle image velocimetry investigation of turbulent jet flame stabilization.
- 197 p.
Co-Chairs: Steven L. Ceccio; James F. Driscoll.
Thesis (Ph.D.)--University of Michigan, 2002.
A new cinema PIV system was developed and used to study the physical phenomena of non-premixed turbulent jet flame stabilization. The system offers an unprecedented combination of image acquisition rate (8000/s), sequence length (4000) and resolution (equivalent to 1K x 1.5K pixels) that provides finely resolved yet extraordinarily lengthy time histories of the evolution of velocity fields in laboratory-scale gas-phase turbulent flows. These measurements provide quantitative information concerning the dynamics of turbulence and combustion that is not available from conventional experimental techniques or computational simulations. For example, time histories of the interaction between turbulent vortex structures and the flame thermal boundary are observed. Gas and flame velocities are obtained simultaneously, yielding direct measurements of flame propagation velocities. The gas and flame velocities are highly correlated, suggesting strong interaction between the velocity field and the flame. The gas and propagation velocities at the flame base remain close to premixed laminar burning velocities (<italic>S<sub>L</sub></italic>), which are three to four times smaller than the velocities in corresponding non-reacting cases. Strong reverse flow is observed upstream of the flame base, suggesting that the velocity reduction is caused by heat release-induced dilatation. These observations suggest that the dilatation velocity field plays a dominant role in stabilization by reducing incident gas velocities to levels at which laminar premixed, triple, or edge flames can be sustained.
ISBN: 0493736875Subjects--Topical Terms:
1018395
Engineering, Aerospace.
Cinema particle image velocimetry investigation of turbulent jet flame stabilization.
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3058068
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