Experimental and numerical analysis of high pressure diesel spray–wall interaction

Andreassi, Luca; Ubertini, Stefano; Allocca, Luigi

doi:10.1016/j.ijmultiphaseflow.2007.01.003

Cited by 80 publications

(30 citation statements)

References 36 publications

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“…The reason is because the impinging velocities of the jet decreased rapidly in the axial direction until it reached 40 mm in comparison to the decrease in the velocity beyond this distance. These results have been compared and verified with the findings from Lee and Lee [12], Park and Lee [10] and Andreassi et al [13]. It was found to be in agreement with Park and Lee.…”

Section: Effect Of Injection Pressure On the Radial Penetrationsupporting

confidence: 89%

Spray-Wall Impingement of Diesel-CNG Dual Fuel Jet using Schlieren Imaging Technique

Ismael

Heikal

Baharom

2014

MATEC Web of Conferences

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Abstract. Natural gas is a low cost fuel with high availability in nature. However, it cannot be used by itself in conventional diesel engines due to its low flame speed and high ignition temperature. The addition of a secondary fuel to enhance the mixture formation and combustion process facilitate its wider use as an alternative fuel. An experimental study was performed to investigate the diesel-CNG dual fuel jet-wall impingement. A constant volume optical chamber was designed to facilitate maximum optical access for the study of the jet-wall impingement at different injection pressures, temperatures and injector-wall distances. The bottom plate of the test rig was made of aluminum (piston material) and it was heated up to 500 K at ambient pressure. An injector driver was used to control the single-hole nozzle diesel injector combined with a natural gas injector. The injection timing of both injectors was synchronized with a camera trigger. The jet-wall impingement of diesel and diesel-CNG dual fuel jets was recorded with a high speed camera using Schlieren imaging technique and associated image processing software. The measurements of the jet radial penetration were higher in diesel-CNG dual fuel while the jet height travel along were higher in the case of diesel single fuel.

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Section: Effect Of Injection Pressure On the Radial Penetrationsupporting

confidence: 89%

Spray-Wall Impingement of Diesel-CNG Dual Fuel Jet using Schlieren Imaging Technique

Ismael

Heikal

Baharom

2014

MATEC Web of Conferences

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“…The techniques used in the past for droplet size measurement can be classified into mechanical methods (droplet capture, cascade impaction, frozen drop and wax methods, and sedimentation technique), electrical methods (Wickse Dukler technique, the charged wire probe, and the hot wire anemometer), and optical methods (photography, holography, laser diffraction, laser anemometry, and various other techniques based on light scattering) (Soid and Zainal 2011;Leng et al 2010;Myong et al 2008;Andreassi et al 2007;Payri et al 2005). Optical techniques were commonly used for macroscopic and microscopic fuel sprays and combustion characterization.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…Figure 2.24 shows the experimental apparatus for the LIF-PIV experiment (Soid and Zainal 2011;Moon et al 2010;Andreassi et al 2007). A double pulsed Nd:YAG laser is utilized to obtain the fluoresced images of tracer droplets.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Diesel Engine Characteristics

Kegl

Pehan

2013

Lecture Notes in Energy

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“…KIVA 3V is one of the most popular codes for the simulation of internal combustion engines, being particularly suitable for managing moving grids (valves and piston motion) and chemically reactive flows [1,2,4,5,7]. This code solves the transient compressible flow equations using a finite volume second-order upwind approach over a multiblock structured mesh; the variable arrangement is staggered.…”

Section: The Multidimensional Code (Kiva 3v)mentioning

confidence: 99%

“…The liquid phase (injection process) is modelled through a Lagrangian approach. Although this code has always been one of the most effective in evaluating engine operations, our research group has provided many modifications in order to improve its predictive capabilities in particular for what concerns grid management, fuel injection and combustion [4,5,7,14] models. The implemented combustion model is the coherent flame model (CFM) implemented by Andreassi et al [6,7] in the KIVA 3V.…”

Section: The Multidimensional Code (Kiva 3v)mentioning

confidence: 99%

Numerical simulation of gaseous fuel injection: A new methodology for multi‐dimensional modelling

Andreassi

Facci

Ubertini

2009

Numerical Methods in Fluids

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SUMMARYThe use of natural gas (instead of liquid or solid fuels) is nowadays drawing an increasing interest in many applications (gas turbines, boilers, internal combustion engines), because of the greater attention to environmental issues. To facilitate the development of these applications, computer models are being developed to simulate gaseous injection, air entrainment and the ensuing combustion.This paper introduces a new method for modelling the injection process of gaseous fuels that aims to hold down grid requirements in order to allow the simulation also of other phenomena, like combustion or valve and piston motion, in reciprocating internal combustion engines. After a short overview of existing models, the transient jet model and the evaluation of inflow conditions are described in detail. Then a basic study of the grid effects on the jet evolution is presented. The model is updated and validated by comparing numerical results with available experimental data for two different operating conditions: a subsonic and a supersonic under-expanded case. The model demonstrates to be fast enough to be used in a multi-dimensional code and accurate enough to follow the real gas jet evolution.

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Experimental and numerical analysis of high pressure diesel spray–wall interaction

Cited by 80 publications

References 36 publications

Spray-Wall Impingement of Diesel-CNG Dual Fuel Jet using Schlieren Imaging Technique

Spray-Wall Impingement of Diesel-CNG Dual Fuel Jet using Schlieren Imaging Technique

Diesel Engine Characteristics

Numerical simulation of gaseous fuel injection: A new methodology for multi‐dimensional modelling

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