Experimental and Numerical Investigation of a Shock Wave Within a Swept Shrouded Propfan Rotor

Abstract

Laser velocity measurements are conducted in a swept propfan rotor in order to investigate the local transonic flow region on the suction surface at high subsonic inlet Mach numbers. The velocity measurements are accompanied by a three-dimensional Navier–Stokes calculation for a selected operating point. The good agreement between computed and measured flow field gives some confidence to study the local three-dimensional passage shock on the suction surface by using the numerical procedure. Apart from the computed three-dimensional shock, structure is investigated in detail. By considering streamlines, it is concluded whether the shock wave is normal or oblique. The results are compared with the one-dimensional shock conditions.

Analytical challenges in breath analysis and its application to exposure monitoring

“…An important source of error when sorbent traps are used is the formation of artifacts caused by degradation reactions of both adsorbed analytes and the adsorbent itself during storage of adsorbent tubes [102,103]. These errors, which take on particular importance when very low concentrations of the target compounds are expected, can be reduced by using on-line traps [102,103].…”