Practical comparison of three tomography algorithms using a simulated 3D flow field

Joseph C. Hsu; James D. Trolinger

doi:10.1117/12.140798

15 February 1993 Practical comparison of three tomography algorithms using a simulated 3D flow field

Joseph C. Hsu, James D. Trolinger

Proceedings Volume 1756, Interferometry: Applications; (1993) https://doi.org/10.1117/12.140798
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Tomography is a technique known for integrating two-dimensional projections into three- dimensional objects. In our application, tomography is used to determine the three- dimensional gas density distribution from a set of two-dimensional interferograms. In an Aeroballistic Range, tomography can be used with multiple-view interferometry to obtain the density field between the shock wave and the model surface. A supersonic flow model is generated by computer code for a 10-degree half angel sharp cone traveling with an angle of attack. Two freestream Mach numbers, 3 and 5, are tested. The calculated indices of refraction are projected two-dimensionally to simulate the results obtained from projected holographic interferometry. Three algorithms based on pixels, a triangular mesh, and polynomial/Fourier decomposition, are used to invert the results tomographically into its three-dimensional flow field. The proficiency and the accuracy of each algorithm are compared under the same matrix inversion process.

Citation Download Citation

Joseph C. Hsu and James D. Trolinger "Practical comparison of three tomography algorithms using a simulated 3D flow field", Proc. SPIE 1756, Interferometry: Applications, (15 February 1993); https://doi.org/10.1117/12.140798

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available