Experimental study of an axisymmetric, supersonic, chemically reacting free jet

摘要

For supersonic combustion, data acquisition is a challenging task, but vital for CFD code validation. The seedless, non-intrusive technique Laser-induced Thermal Acoustics (LITA) is a promising alternative to established techniques such as Particle Image Velocimetry (PIV) and Coherent anti-Stokes Raman Spectroscopy (CARS). In this paper, we present experimental investigations in a Ma = 1.45 chemically reacting H_2/air free jet at a total temperature of 1320 K. In order to demonstrate the reliability of LITA measurements under these conditions, measurements were also performed in a turbulent supersonic air/air free jet and subsonic standard flames generated by a laboratory McKenna Burner. Detailed experimental results as well as the full geometric data of the nozzle are provided, so that comparisons with numerical predictions can be carried out easily.