Development and Application of Laser-Based Diagnostics for Combustion Research at DLR Cologne

Abstract

Concerned with delivering measurement data from transonic turbomachinery and pressurized combustion facilities alike, the division of Measurement Techniques at the Institute of Propulsion Technology develops and utilizes a wide variety of primarily laser-based diagnostics for velocimetry and spectroscopy. The paper intends to give an overview of the group’s activities highlighting some of the more recent efforts, such as three-component PIV measurements in a full scale gas turbine combustors as well as single line OH-thermometry for planar temperature measurement in lean combustion. Concerning light sources, both a new laser system for unsteady planar Doppler velocimetry as well as low cost illumination sources using high power light-emitting diodes for high speed shadowgraphy and PIV are described.