Near- and farfield measurements of aero-optical effects due to propagation through hypersonic flows. Yanta, W., J., Spring, W., C., Neal, D., R., Hamrick, D., R., Copland, R., J., Lafferty, J., F., Collier, A., S., Bell, R., L., Pezzaniti, L., Banish, M., & Shaw, R. In AIAA 2000-2357, pages 19-22, 2000.
Near- and farfield measurements of aero-optical effects due to propagation through hypersonic flows [pdf]Paper  doi  abstract   bibtex   
A series of aero-optics tests was carried out at Mach 7 in the Hypervelocity Wind Tunnel 9 (Tunnel 9) at the Arnold Engineering Development Center (AEDC). The test bed used for the measurements consisted of two flat plates which had sapphire windows mounted in titanium frames. Aero-optic measurements included near-field phase and intensity measurements made with two wavefront sensors, far-field point spread functions made with an imaging camera, and high temporal frequency optical tilts (boresight error) made with an X-Y Detector. Ancillary measurements of pressure and heat transfer on the test-bed plates were aiso made. The aero-optic measurements resulted in phase and intensity maps, boresight errors, contained energy diameters (CED's) and point spread functions (PSF's) that are associated with uncooled missile windows. Comparisons between the various measurements are made to ascertain aerodynamic effects, instrument errors, facility-induced errors, and measurement uncertainties.

Downloads: 0