2010 Fiscal Year Final Research Report
Atomization Process of Liquid Jet with Turbulence Induced by Cavitation
| Project/Area Number |
20560160
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Fluid engineering
|
|---|
| Research Institution | Kobe University |
|---|
Principal Investigator |
SOU Akira Kobe University, 大学院・海事科学研究科, 准教授 (20314502)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TOMIYAMA Akio 神戸大学, 大学院・工学研究科, 教授 (30211402)
HOSOKAWA Shigeo 神戸大学, 大学院・工学研究科, 准教授 (10252793)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | 微粒化 |
|---|
| Research Abstract |
Improvement in thermal efficiency and reduction in emissions of internal combustion engines are expected. In order to clarify the cavitation taking place in a nozzle of a liquid injector and its effects on liquid jet atomization process, high-speed visualizations and numerical simulations of cavitation in nozzles are carried out. As a result, the effects of geometry, length-to-diameter ratio of nozzles and asymmetric inflow on cavitation and discharged liquid jets are clarified. It is clarified that cavitation in various nozzles with different geometries can be predicted by using a modified cavitation number. Numerical method based on LES, bubble tracking model and Rayleigh-Plesset equation enables us to simulate unsteady cavitation in a nozzle.
|
