Spray-aerodynamic interaction

Objective

Combustion starts with the injection of a fuel. Liquid fuel will be introduced into the combustion chamber as droplets to ease its evaporation. The behavior of these droplets in the turbulence field inside the combustion chamber has a significant impact on combustion efficiency and the emission of pollutants.

The objective of this project is to understand better the interaction between aerodynamic features of a range of engineering flows and liquid sprays and its inclusion in a computer-based method of calculation which will benefit design.

The research will provide also a method of calculation for the representation of sprayaerodynamic interactions and experimental techniques such as Phase-Doppler velocimetry, enhanced phase-Doppler velocimetry, particle-image velocimetry and nephelometry. It will have be applied to and developed for a wide range of applications.


Primary and secondary atomization, evaporation and combustion of steady and unsteady sprays will be addressed using light-scattering techniques. The work will be carried out in five different tasks:
1. Spray aerodynamic interaction and its effect on Diesel engine performance (Univ. Politéc.Valencia) :
Basic unsteady Diesel spray experimental studies will be performed under different conditions. Endoscopic high-speed visualization of injection-combustion phenomena in a real Diesel engine will be combined with classical performance parametric engine studies.

2. Measurement of velocity, size droplet and fuel concentration in a four stroke engine (Univ. Paris VI) :
Phenomena of liquid atomization in the cylinder of a motored four strokes engine with skip ignition will be studied by means of Mie scattering and digital image processing.

3. Interaction of multiple sprays (Univ.Erlangen-Nürnberg) : Experimental basic spray studies will be performed, focused on interaction of multiple sprays with and without influence of air flows and wall impingement. An extended phase Doppler anemometry technique will be the main tool to carry out these studies according to droplets' refractive index of sprays.

4. Modelling of spray-aerodynamic interaction (Nat. Tech. Univ. Athens) : This computational work will use the data provided by the other four partners to check and improve their computer--based calculation methods. The latest numerical procedures and models for turbulent-flow characteristics, will be used.

5. Steady and unsteady sprays with evaporation and combustion (Imperial College, London).
PDA will be combined with high-speed photography to examine flow structure of gasoline hollow-cone steady and unsteady sprays with evaporation and combustion.

Fields of science

• engineering and technology › environmental engineering › energy and fuels › liquid fuels
• social sciences › media and communications › graphic design
• medical and health sciences › basic medicine › neurology › stroke

Programme(s)

• FP3-JOULE 2 - Specific research and technological development programme (EEC) in the field of non-nuclear energy, 1990-1994

Topic(s)

• 040301 - Combustion

Call for proposal

Data not available

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

UNIVERSIDAD POLITECNICA DE VALENCIA

Address

14,campus De Camino De Vera 14
46022 Valencia
Spain

Participants (4)

IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE

United Kingdom

Address

South Kensington Campus
London

NATIONAL TECHNICAL UNIVERSITY OF ATHENS

Greece

Address

5,heroon Polytechniou 5
15710 Athens

UNIVERSITY OF ERLANGEN-NUREMBERG

Germany

Address

Cauerstrasse 4
91058 Erlangen

Université de Paris VI (Université Pierre et Marie Curie)

France

Address

2 Place De La Gare De Ceinture
78210 Saint-cyr-l'ecole