Schlieren optical systems are commonly used by researchers to visualize density changes that cannot easily be seen by the naked eye (i.e., flow crossing a shock wave). Along with the visual aspects of a Schlieren system, valuable information can be obtained to either confirm theoretical concepts or to explore flow characteristics. The ARC was in need of a Schlieren system that was both portable and simple to assemble. One has been constructed and is currently being tested that is maneuverable on portable tables that can be placed on either side of the wind tunnels. Alignment, often the most time-consuming task with Schlieren systems, can be completed rapidly with the use of a mobile laser alignment system connected to the mirrors. Color has been added using a new inexpensive technique. Detailed results will be reported in an upcoming 2009 AIAA conference paper. Some initial pictures will be shown below as we take them and they will improve in clarity by the time of the conference. |
