Judith Richter

Judith Richter
Universität Stuttgart · Institute of Aerospace Thermodynamics

Dipl.-Ing.

About

10
Publications
785
Reads
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22
Citations
Citations since 2016
10 Research Items
22 Citations
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201620172018201920202021202201234567
201620172018201920202021202201234567
201620172018201920202021202201234567

Publications

Publications (10)
Article
Full-text available
This paper reports on particle image velocimetry (PIV) measurements in compressible accelerated wake flows generated by two different central injector types, which are mounted in a convergent-divergent nozzle. The injectors differ by the extent of their trailing edge located either in the subsonic (injector A) or supersonic flow region (injector B)...
Conference Paper
Recognizing the attention currently devoted to the environmental impact of aviation, this three-part publication series introduces two new aircraft propulsion concepts for the timeframe beyond 2030. The first part focuses on the novel steam injecting and recovering aero engine concept. In the second part, the free-piston composite cycle engine conc...
Article
The compressible accelerated mixing layer of a central injector was thoroughly investigated experimentally to provide a data set that can be used for validating numerical simulations. A drop-shaped central injector was mounted upstream of a rectangular convergent-divergent nozzle, through which air was accelerated to a Mach number of 1.7. The free-...
Conference Paper
This paper reports on the prediction of transonic mixing layers that develop downstream of two different types of central injectors. The injectors are placed in a convergent-divergent nozzle and differ only by the position of their trailing edges up- and downstream of the nozzle throat. Therefore, both sub- and supersonic wake flows are considered....
Article
Toluene laser-induced fluorescence (LIF) has been applied to image the mixing deficit on the molecular level in the transonic wake of two different blunt-body injectors in a compressible accelerated nozzle flow. A single-color excitation and two-color detection scheme is employed to measure the signal red-shift caused by the quenching effect of mol...
Article
Full-text available
Non-resonant laser-induced thermal acoustics (LITA) was applied to measure Mach number, temperature and turbulence level along the centerline of a transonic nozzle flow. The accuracy of the measurement results was systematically studied regarding misalignment of the interrogation beam and frequency analysis of the LITA signals. 2D steady-state Reyn...
Conference Paper
Full-text available
Mixing processes of reactants injected into high-speed flows are of particular interest considering applications in supersonic propulsion or, very recently, nanoparticle production in shock-wave flow reactors. Thus, a good understanding of the flow mechanisms downstream of the injection position is crucial. In this work, we present results from exp...
Conference Paper
To reduce CO2 emissions from the combustion of fossil and alternative fuels, carbon capture technologies present a promising approach. But the efficiency of the capture process depends on the CO2 concentration in the exhaust gas which is relatively low for gas turbine power plants. Exhaust gas recirculation (EGR) is a promising approach to increase...
Conference Paper
Full-text available
The macroscopic mixing behavior behind central injectors in a compressible accelerated nozzle flow has been investigated experimentally using schlieren imaging and planar laser induced fluorescence (LIF) of injected toluene. For this purpose, a new modular flow channel exhibiting a rectangular cross section, optical access from all four sides, and...

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Projects

Projects (2)
Project
Demonstration Innovativer Antriebskonzepte für 2030+ ——— Pursuing the targets of the Flightpath 2050 program, i.e. a reduction of 75% in CO2 and 90% in NOx emissions, the aviation industry must look beyond the incremental improvement of the conventional gas turbine cycle and consider completely new propulsion concepts. Therefore, a consortium of industrial, academic and national research institutions was formed to investigate and demonstrate the feasibility of two promising aircraft propulsion concepts up to technology readiness level of four.