Atomization and Sprays Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

For Online Access

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1991, Volume1

Issue 4

132 pages

Issue price - $75.00

Andrew J. Yule
Spray Research Group (SRG), Insititute of Materials Research (IMR), School of Computing, Science and Engineering, University of Salford, Manchester, UK

A. Paul Watkins
Atomization and Sprays Research Group, Department of Mechanical, Aerospace and Manufacturing Engineering, University of Manchester Institute of Science and Technology, Manchester, U.K.

This paper presents an overview of aspects of a long-term computational and experimental investigation related to the in-chamber flow of direct-injection diesel engines. The pulsed sprays formed by a single-hole diesel injector are investigated as a function of gas pressure, temperature, cross-flow velocity, and turbulence level. The impaction of the sprays on a wall is also examined. Cyclic variations of the spray structure, from pulse to pulse, are reported and measurements of the spray breakup length are made as a function of time after needle lift and also of the spray environment. These are compared with measurements obtained by various techniques in previous work. The experiment program is carried out in parallel with the development of a computational fluid dynamics (CFD) model of the spray and of spray-gas flow and spray-wall interaction. There is generally good agreement with the predictions of a CFD model of the pulsed spray, and areas for further development of the CFD model are isolated.

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