年間 12 号発行
ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684
Indexed in
MEASUREMENT AND MODELING OF DIESEL SPRAYS
要約
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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