3D Velocimetry Equipment for Evaluation of Real Roughness Effects in Wall Turbulence

摘要

This grant supported the purchase of state-of-the-art particle-image velocimetry (PIV) equipment, necessary modifications to an existing boundary- layer wind tunnel and construction of roughness panels in Support of an AFOSR core grant (FA9550-05-1-0043). The equipment proposed was meant to significantly improve the PIV spatial dynamic range achievable in the Pi's lab as well as broaden the range of Reynolds numbers that could feasibly be studied to meet the goals of the Pi's current and future research efforts with AFOSR. In addition, significant modifications to an existing boundary- layer wind tunnel and construction of various roughness topologies were proposed to enhance the Pi's capabilities to study the influence of highly-irregular surface roughness on the character of wall-bounded turbulence. The PI is also utilizing the new PIV cameras procured with this DURIP funding to advance his development of microscale temperature-measurement methods in support of an AFOSR MURI grant (FA9550-05-1-O346) on which he is a co-PI.