NASA NTRS · 20210012624
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Brett Bathel, Joshua Weisberger, Stephen Jones, Alex Scammell. Schlieren Capabilities for Arc-Heated Testing. https://ntrs.nasa.gov/citations/20210012624
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The original Langley Working Paper (LWP 448) published on July 27th, 1967, provided guidance to NASA Langley Research Center personnel on how to set up conventional path-integrated schlieren flow visualization systems and what pitfalls could be expected with such setups. The guidance and information contained in the document continues to be used for schlieren setups at NASA Langley Research Center to this day.
This presentation describes the latest improvements that have been made to the Schlieren systems at the NASA Glenn Research Center. These systems are used for the visualization of flow and shock structures in our wind tunnel test facilities. Improvements have been made to the optics, light sources and knife edges using the latest state-of-the-art technology. The eventual goal of this upgrade work is to improve the sensitivity of the systems so that they can be used to make quantitative flow measurements.
We describe the three methods to be deployed on the X-59 QueSST aircraft and their development. The three methods are Background Oriented Schlieren with Celectial Obhects, Airborne Background Oriented Schlieren, and Sun-edge distortion Schlieren