Principle of soft x-ray moire deflectometry for flow field visualization in a diesel combustion chamber

Haihang You; Dapeng Yan; Zhengdong Wang; Anzhi He

doi:10.1117/12.279420

14 October 1997 Principle of soft x-ray moire deflectometry to visualize a flow field in a diesel combustion chamber

Haihang You, Dapeng Yan, Zhengdong Wang, Anzhi He

Proceedings Volume 3157, Applications of X Rays Generated from Lasers and Other Bright Sources; (1997) https://doi.org/10.1117/12.279420
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The technique based on Moire deflectometry with soft x-ray laser beam has been demonstrated by the research group of D. Ress in the research of plasma produced by laser. We apply this method to visualize the flow field in diesel combustion chamber, and it is also a new application in the world. When a beam of collimated light passes through the flow field, the index-of-refraction gradient in the plasma bends the rays through an angle. A Moire pattern is created when a probe beam is passed through a pair of rotationally offset (angle (theta) ) 1D rulings consisting of evenly spaced opaque and transmissive stripes. By measuring the fringe shift we can get the information of flow field.

Citation Download Citation

Haihang You, Dapeng Yan, Zhengdong Wang, and Anzhi He "Principle of soft x-ray moire deflectometry to visualize a flow field in a diesel combustion chamber", Proc. SPIE 3157, Applications of X Rays Generated from Lasers and Other Bright Sources, (14 October 1997); https://doi.org/10.1117/12.279420

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