Next Article in Journal
Study on Size Design of Shaft Protection Rock/Coal Pillars in Thick Soil and Thin Rock Strata
Next Article in Special Issue
Experimental Studies of Fuel Injection in a Diesel Engine with an Inclined Injector
Previous Article in Journal
Energy System Modelling of Carbon-Neutral Hydrogen as an Enabler of Sectoral Integration within a Decarbonization Pathway
Previous Article in Special Issue
Experimental Research of High-Temperature and High-Pressure Water Jet Characteristics in ICRC Engine Relevant Conditions
Open AccessArticle

Analyzing the Interaction of Vortex and Gas–Liquid Interface Dynamics in Fuel Spray Nozzles by Means of Lagrangian-Coherent Structures (2D)

1
Institut für Thermische Strömungsmaschinen (ITS), Karlsruher Institut für Technologie (KIT), Kaiserstraße 12, 76131 Karlsruhe, Germany
2
Institut für Visualisierung und Datenanalyse (IVD), Karlsruher Institut für Technologie (KIT), Am Fasanengarten 5, 76131 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Energies 2019, 12(13), 2552; https://doi.org/10.3390/en12132552
Received: 14 May 2019 / Revised: 21 June 2019 / Accepted: 24 June 2019 / Published: 2 July 2019
(This article belongs to the Special Issue Experimental and Numerical Analysis of Fuel Spray in Engines)
Predictions of the primary breakup of fuel in realistic fuel spray nozzles for aero-engine combustors by means of the SPH method are presented. Based on simulations in 2D, novel insights into the fundamental effects of primary breakup are established by analyzing the dynamics of Lagrangian-coherent structures (LCSs). An in-house visualization and data exploration platform is used in order to retrieve fields of the finite-time Lyapunov exponent (FTLE) derived from the SPH predictions aiming at the identification of time resolved LCSs. The main focus of this paper is demonstrating the suitability of FTLE fields to capture and visualize the interaction between the gas and the fuel flow leading to liquid disintegration. Aiming for a convenient illustration at a high spatial resolution, the analysis is presented based on 2D datasets. However, the method and the conclusions can analoguosly be transferred to 3D. The FTLE fields of modified nozzle geometries are compared in order to highlight the influence of the nozzle geometry on primary breakup, which is a novel and unique approach for this industrial application. Modifications of the geometry are proposed which are capable of suppressing the formation of certain LCSs, leading to less fluctuation of the fuel flow emerging from the spray nozzle. View Full-Text
Keywords: primary breakup; smoothed particle hydrodynamics; Lagrangian-coherent structures; fuel atomization; jet engine combustor primary breakup; smoothed particle hydrodynamics; Lagrangian-coherent structures; fuel atomization; jet engine combustor
Show Figures

Figure 1

MDPI and ACS Style

Dauch, T.F.; Ates, C.; Rapp, T.; Keller, M.C.; Chaussonnet, G.; Kaden, J.; Okraschevski, M.; Koch, R.; Dachsbacher, C.; Bauer, H.-J. Analyzing the Interaction of Vortex and Gas–Liquid Interface Dynamics in Fuel Spray Nozzles by Means of Lagrangian-Coherent Structures (2D). Energies 2019, 12, 2552.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop