A three-dimensional flame reconstruction method for SI combustion based on two-dimensional images and geometry model
2022-01-0520
03/29/2022
- Content
- An attempt has been made to develop a feasible method to reconstruct the three-dimensional flame surface of SI combustion. A double-window constant volume vessel was designed to simultaneously obtain the side and bottom images of the flame. High speed flame image acquisition were conducted from two different optical windows. The flame front was re-constructed based on two-dimensional images with a slicing model, in which the flame characteristics were derived by slicing flame contour modeling and flame-piston collision analysis. The flame irregularity and anisotropy were also taken into consideration. Two different principles were used to build the model, which were called the ellipse hypothesis modeling and a deep learning modeling. The reconstruction results show that part of the wrinkled and folded structure of the flame front can be revealed based on the bottom view images. In particular, the reconstruction results of the deep learning modeling can reveal more accurate flame structure details. Then the propagation velocity of the reconstructed flame was investigated. The fierce variation in the late stage of the statistic velocity curve was found to be a sign indicating the end of the flame development, which might be suitable as a robust and quick criterion in massive image data analysis.
- Citation
- Du, H., Liang, S., Ma, X., Mao, J. et al., "A three-dimensional flame reconstruction method for SI combustion based on two-dimensional images and geometry model," SAE Technical Paper 2022-01-0520, 2022, .