Anna von der Heyden

Anna von der Heyden
Technische Universität Darmstadt | TU · Department of Mechanical Engineering (Dept.16)

Master of Science

About

8
Publications
615
Reads
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22
Citations

Publications

Publications (8)
Article
Full-text available
In this work, wavelengths were determined for the robust and simultaneous measurement of film thickness, urea concentration and fluid temperature. Film parameters such as film thickness, film temperature and the composition of the film are typically dynamically and interdependently changing. To gain knowledge of these quantities, a measurement meth...
Article
Full-text available
In this work, an experimental investigation of AdBlue film formation in a generic selective catalytic reduction (SCR) exhaust gas test bench is presented. AdBlue is injected into a generic SCR test bench resulting in liquid film formation on the lower wall of the channel. The thickness of this liquid film is measured using a film thickness sensor b...
Article
We present a tomographic spectrometer for the measurement of gas phase species parameter distributions within the cross section of a generic exhaust gas test rig built for the investigation of the physico-chemical processes during exhaust gas aftertreatment with selective catalytic reduction (SCR). A urea-water solution (UWS) is injected into the h...
Article
In this work, a generic exhaust gas test bench is introduced on which reproducible experiments can be performed to gain a deeper understanding of processes during exhaust gas aftertreatment of internal combustion engines. We present the design and initial flow characterization as well as tomographic measurement results of gaseous water distribution...
Conference Paper
An absorption based laser sensor for film thickness measurement of DEF in an exhaust gas test bench is presented. A wavelength pre-selection ensures that film-thicknesses could be measured without cross sensitivity to temperature or concentration.
Article
In this work, an absorption based laser sensor for the investigation of dynamically changing liquid film thicknesses is developed and validated. For the wavelength selection of the single-ended, fibre-coupled, diode-laser sensor, near-infrared spectra of liquid water are measured at various thicknesses and temperatures. To reduce the influence of t...
Conference Paper
An absorption based laser sensor for the investigation of liquid film thicknesses of DEF is presented. A wavelength pre-selection ensures that film thicknesses could be measured without cross sensitivity to temperature or concentration.
Conference Paper
More stringent exhaust emissions regulation of IC engines requires more detailed investigation of the aftertreatment and conversion processes of the exhaust flow. Here, we present three independent laser absorption spectrometers for the measurement of mole fractions and temperature during EGR, SCR aftertreatment and at the tail pipe end.

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