TY - JOUR
T1 - Application of Three-Dimensional Diagnostics on the Direct-Current Electric-Field Assisted Combustion
AU - Liu, Hecong
AU - Yang, Zifeng
AU - Cai, Weiwei
N1 - Publisher Copyright:
© 2021 Elsevier Masson SAS
PY - 2021/5
Y1 - 2021/5
N2 - Recent research has shown that the electric field could impact the flame in multiple aspects, especially in flame propagation and diffusion. However, the available literature all focused on one- or two-dimensional flow characteristics and the flame under study was simple, such as a Bunsen flame or a flat flame. In this work, a method aiming to measure the three-dimensional deformation speed was developed, which combines endoscopic tomography with three-dimensional optical flow algorithm. This method was first validated on an oil lamp flame under the effects of a 10 kV direct-current electric field. The result was compared with that calculated from the spatial derivative of the flame height or edge. After the validation, the proposed method was adopted to study the impact of the external direct-current electric field on swirl-stabilized flames. The results showed that the electric field was able to significantly increase the swirl-stabilized flame height and restrain the horizontal flame deformation speed. This method represents the first attempt to measure the three-dimensional distribution of the flame deformation speed in the field of combustion diagnostics. Besides, different dynamic responses of the two kinds of flames were observed.
AB - Recent research has shown that the electric field could impact the flame in multiple aspects, especially in flame propagation and diffusion. However, the available literature all focused on one- or two-dimensional flow characteristics and the flame under study was simple, such as a Bunsen flame or a flat flame. In this work, a method aiming to measure the three-dimensional deformation speed was developed, which combines endoscopic tomography with three-dimensional optical flow algorithm. This method was first validated on an oil lamp flame under the effects of a 10 kV direct-current electric field. The result was compared with that calculated from the spatial derivative of the flame height or edge. After the validation, the proposed method was adopted to study the impact of the external direct-current electric field on swirl-stabilized flames. The results showed that the electric field was able to significantly increase the swirl-stabilized flame height and restrain the horizontal flame deformation speed. This method represents the first attempt to measure the three-dimensional distribution of the flame deformation speed in the field of combustion diagnostics. Besides, different dynamic responses of the two kinds of flames were observed.
KW - Combustion diagnostics
KW - Dynamic response
KW - Electric field
KW - Flame deformation speed
UR - https://www.scopus.com/pages/publications/85103331156
UR - https://www.scopus.com/inward/citedby.url?scp=85103331156&partnerID=8YFLogxK
U2 - 10.1016/j.ast.2021.106657
DO - 10.1016/j.ast.2021.106657
M3 - Article
AN - SCOPUS:85103331156
SN - 1270-9638
VL - 112
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
M1 - 106657
ER -