Modeling of particle imaging through shock waves

Gerrit E. Elsinga; Bas W. van Oudheusden; Fulvio Scarano

doi:10.1117/12.616687

18 August 2005 Modeling of particle imaging through shock waves

Gerrit E. Elsinga; Bas W. van Oudheusden; Fulvio Scarano;

Author Affiliations +

Proceedings Volume 5867, Optical Modeling and Performance Predictions II; 58670M (2005) https://doi.org/10.1117/12.616687
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

In compressible flows particle imaging, as done in Particle Image Velocimetry (PIV), is far from trivial. The inhomogeneous refractive index field can cause aero-optical aberrations including blurring of the image, especially near optical interfaces such as shock waves. The understanding of the process causing particle image blur (or blurring of the point spread function of the imaging system) is important in order to assess the measurement accuracy of optical measurement systems, such as PIV. A model for imaging through a shock wave is presented to determine the characteristic shape of blurred particle images when imaged across shock waves. The conjectured model is validated through a PIV experiment, where particle image recordings of the flow across a steady oblique shock wave are obtained in a supersonic wind tunnel. The parametric study focuses on two dominating parameters: 1) the angle between the viewing axis and the shock wave; 2) the numerical aperture of the imaging optics.

Citation Download Citation

Gerrit E. Elsinga, Bas W. van Oudheusden, Fulvio Scarano, "Modeling of particle imaging through shock waves", Proc. SPIE 5867, Optical Modeling and Performance Predictions II, 58670M (18 August 2005); doi: 10.1117/12.616687; https://doi.org/10.1117/12.616687

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

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

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years