Reconstruction of a flow field by holographic interferometric tomography

Tiejun Zhao; Soyoung Stephen Cha

doi:10.1117/12.293394

21 November 1997 Reconstruction of a flow field by holographic interferometric tomography

Tiejun Zhao, Soyoung Stephen Cha

Proceedings Volume 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III; (1997) https://doi.org/10.1117/12.293394
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

A new tomographic algorithm termed Curvilinear Nonlocal Basis Function Method (CNBFM) is formulated and tested for several different computer-generated fields. In addition, the performance of the hybrid method combining the CNBFM and the previously-developed complementary field method is also tested for the same fields. A holographic interferometric tomographic experiment is designed to apply the developed techniques for reconstruction of a 3D temperature field generated by a thermal plume with an aircraft forebody model inside the flow. Reconstruction results are compared with the corresponding thermocouple readings to check the accuracy of the technique. All the fields form the numerical simulation and the experiment are reconstructed under ill- posed conditions, i.e., limited view angle and incomplete projection. It appears that the developed method can substantially enhance the reconstruction accuracy and resolution in real applications of interferometric 3D flow measurements.

Citation Download Citation

Tiejun Zhao and Soyoung Stephen Cha "Reconstruction of a flow field by holographic interferometric tomography", Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); https://doi.org/10.1117/12.293394

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