Description AC2-10
Internal combustion engine flows for motored operation
Application Challenge AC2-10 © copyright ERCOFTAC 2024
Abbreviations
Mesh | Strut | Guide vane | Runner | Draft tube | Total |
---|---|---|---|---|---|
High-Reynolds Coarse | 3 × 105 | 7 × 105 | 7.6 × 105 | 1 × 106 | 2.76 × 106 |
High-Reynolds Fine | 3 × 105 | 8 × 105 | 1.1 × 106 | 2.85 × 106 | 5.05 × 106 |
Low-Reynolds Coarse | — | 9.3 × 105 | 1.13 × 106 | 1.35 × 106 | 3.41 × 106 |
Low-Reynolds Fine | — | 9.3 × 105 | 1.13 × 106 | 2.66 × 106 | 4.72 × 106 |
ALE | Arbitrary Lagrangian-Eulerian | aTDC | after top dead center |
bTDC & before top dead center\\ BDC & bottom dead center\\ CA & crank angle\\ CAD & crank angle degreeCCD charge-coupled device\\ CCV & cycle-to-cycle variation\\ CDS & central differencing scheme\\ CFD & computational fluid dynamics\\ CFL & Courant-Friedrichs-Lewy\\ ENO & Essentially Non-Oscillatory\\ ERG & exhaust-gas-recirculation\\ EVC & exhaust valve closing\\ EVO & exhaust valve opening\\ HS-PIV & hight speed particle image velocimetry\\ IC & internal combustion\\ IVC & intake valve closing\\ IVO & intake valve opening\\ LES & large eddy simulation\\ MRV & magnetic resonance velocimetry\\ PIV & particle image velocimetry\\ POV & field-of-view\\ QSOU & quasi-second-order upwind\\ QUICK & Quadratic Upwind Interpolation for Convective Kinematics\\ RANS & Reynolds-averaged Navier-Stokes\\ RMS & root mean square\\ RPM & rounds per minute\\ SAS & scale-adaptive simulation\\ SRS & scale-resolving simulation\\ SST & shear stress transport\\ TDC & top dead center\\ TUBF & Technische Universität Bergakademie Freiberg\\ TUD & Technische Universität Darmstadt\\ TVD & total variation diminishing\\ UDE & Universität Duisburg-Essen\\ URANS & unsteady Reynolds-averaged Navier-Stokes\\ WG & wall-guided\\
Introduction
The TU Darmstadt engine is an optically accessible single cylinder spark-ignition direct injection engine. It is embedded in an especially designed test bench to provide well characterized boundary conditions and reproducible engine operation. A reproducible engine operation is needed to characterize the variety of in-cylinder processes and is a prerequisite for any comparison of experiments and simulations. The in-cylinder processes are characterized using advanced laser-diagnostics to provide measurements at high spatial and temporal resolutions. The aim of this effort is, to build up a comprehensive data set
- to give insights into the underlying physics for a better understanding of the relevant in-cylinder processes and
- for the validation of CFD simulations especially for large eddy simulations (LES).
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Contributed by: Carl Philip Ding,Rene Honza, Elias Baum, Andreas Dreizler — Fachgebiet Reaktive Strömungen und Messtechnik (RSM),Technische Universität Darmstadt, Germany
Contributed by: Brian Peterson — School of Engineering, University of Edinburgh, Scotland UK
Contributed by: Chao He , Wibke Leudesdorff, Guido Kuenne, Benjamin Böhm, Amsini Sadiki, Johannes Janicka — Fachgebiet Energie und Kraftwerkstechnik (EKT), Technische Universität Darmstadt, Germany
Contributed by: Peter Janas, Andreas Kempf — Institut für Verbrennung und Gasdynamik (IVG), Lehrstuhl für Fluiddynamik, Universität Duisburg-Essen, Germany
Contributed by: Stefan Buhl, Christian Hasse — Fachgebiet Simulation reaktiver Thermo-Fluid Systeme (STFS), Technische Universität Darmstadt, Germany; former: Professur Numerische Thermofluiddynamik (NTFD), Technische Universität Bergakademie Freiberg, Germany
© copyright ERCOFTAC 2018