Flow Field Investigation of a Single Engine Valve Using PIV, POD, and LES
Author:
Hoffmann Jana1ORCID, Mirsch Niklas2, Vera-Tudela Walter1ORCID, Wüthrich Dario1, Rosenberg Jorim1, Günther Marco2, Pischinger Stefan2, Weiss Daniel A.1, Herrmann Kai1ORCID
Affiliation:
1. Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland 2. Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, Forckenbeckstrasse 4, 52074 Aachen, Germany
Abstract
Due to stringent emission regulations, it is of practical significance to understand cycle-to-cycle variations in the combustion of fossil or renewable fuels to reach future emission regulations. The present study aims to conduct a parametric investigation to analyse the influence of the valve lift and different mass flows of an inlet valve of the test engine “Flex-OeCoS” on the flow structures. To gain a deeper understanding of the flow behaviour, an optical test bench for 2D Particle Image Velocimetry (PIV) and a Large Eddy Simulation (LES) are used. Turbulence phenomena are investigated using Proper Orthogonal Decomposition (POD) with a quadruple decomposition and the Reynolds stress transport equation. The results show good agreement between the PIV and LES. Moreover, the main flow structures are primarily affected by valve lift while being unaffected by mass flow variation. The turbulent kinetic energy within the flow field increases quadratically to the mass flow and to the decreasing valve lift, where large high-energetic flow structures are observed in the vicinity of the jet and small low-energetic structures are homogeneously distributed within the flow field. Furthermore, the convective flux, the turbulent diffusive flux, the rate of change, and the production of specific Reynolds stress are the dominant terms within the specific Reynolds stress transport equation.
Funder
Swiss Federal Office of Energy FVV German Federation of Industrial Research Associations
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference100 articles.
1. IJER editorial: The future of the internal combustion engine;Reitz;Int. J. Engine Res.,2020 2. International Energy Agency—IEA (2022, November 20). World Energy Outlook 2019. Available online: https://www.iea.org/reports/world-energy-outlook-2019. 3. Implementation of thermal and fuel stratification strategies to extend the load limit of HCCI engine;Karwade;J. Therm. Sci. Technol.,2019 4. Ozdor, N., Dulger, M., and Sher, E. (1994). Cyclic Variability in Spark Ignition Engines a Literature Survey, SAE. Technical Paper. 5. Ozdor, N., Dulger, M., and Sher, E. (1996). Advances in Engine Combustion and Flow Diagnostics, SAE International.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|