TY  - CHAP
A1  - Schopen, Oliver
A1  - Kemper, Hans
A1  - Esch, Thomas
T1  - Development of a comparison methodology and evaluation matrix for electrically driven compressors in ICE and FC
T2  - Proceedings of the 1st UNITED – Southeast Asia Automotive Interest Group (SAIG) International Conference
N2  - In addition to electromobility and alternative drive systems, a focus is set on electrically driven compressors (EDC), with a high potential for increasing the efficiency of internal combustion engines (ICE) and fuel cells [01]. The primary objective is to increase the ICE torque, provided independently of the ICE speed by compressing the intake air and consequently the ICE filling level supported by the compressor. For operation independent from the ICE speed, the EDC compressor is decoupled from the turbine by using an electric compressor motor (CM) instead of the turbine. ICE performances can be increased by the use of EDC where individual compressor parameters are adapted to the respective application area [02] [03]. This task contains great challenges, increased by demands with regard to pollutant reduction while maintaining constant performance and reduced fuel consumption. The FH-Aachen is equipped with an EDC test bench which enables EDC-investigations in various configurations and operating modes. Characteristic properties of different compressors can be determined, which build the basis for a comparison methodology. Subject of this project is the development of a comparison methodology for EDC with an associated evaluation method and a defined overall evaluation method. For the application of this comparison methodology, corresponding series of measurements are carried out on the EDC test bench using an appropriate test device.
KW  - electro mobility
KW  - fuel cell
KW  - internal combustion engine
KW  - electrically driven compressors
Y1  - 2021
SN  - 978-3-902103-94-9
N1  - 1st UNITED-SAIG International Conference, 21-22 APR 2021, Chulalongkorn University, Thailand
SP  - 45
EP  - 46
PB  - FH Joanneum
CY  - Graz
ER  - 
TY  - CHAP
A1  - Stark, Ralf
A1  - Rieping, Carla
A1  - Esch, Thomas
T1  - The impact of guide tubes on flow separation in rocket nozzles
T2  - Aerospace Europe Conference 2023 - 10th EUCASS - 9th CEAS
N2  - Rocket engine test facilities and launch pads are typically equipped with a guide tube. Its purpose is to ensure the controlled and safe routing of the hot exhaust gases. In addition, the guide tube induces a suction that effects the nozzle flow, namely the flow separation during transient start-up and shut-down of the engine. A cold flow subscale nozzle in combination with a set of guide tubes was studied experimentally
to determine the main influencing parameters.
KW  - Guide Tube
KW  - TICTOP
KW  - Nozzle
KW  - Suction
Y1  - 2023
N1  - Lausanne, July 9-13, 2023
ER  - 
TY  - CHAP
A1  - Stark, Ralf
A1  - Bartel, Sebastian
A1  - Ditsche, Florian
A1  - Esch, Thomas
T1  - Design study of a 30kN LOX/LCH4 aerospike rocket engine for lunar lander application
T2  - Aerospace Europe Conference 2023 - 10th EUCASS - 9th CEAS
N2  - Based on lunar lander concept EL3, various LOX/CH4 aerospike engines were studied. A distinction was made between single and cluster configurations as well as ideal and non-ideal contour concepts. It could be shown that non-ideal aerospike engines promise a significant payload gain.
Y1  - 2023
N1  - Lausanne, July 9-13, 2023
ER  -