Journal of ILASS-Korea (한국분무공학회지)
- Volume 10 Issue 4
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- Pages.32-46
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- 2005
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- 1226-2277(pISSN)
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- 2288-9051(eISSN)
Breakup Characteristics of Impinging and Swirl Type Injectors
- Yoon, Y.B. (School of Mechanical and Aerospace Engineering, Seoul National University)
- Published : 2005.12.31
Abstract
The breakup characteristics of liquid sheets formed by the impinging and swirl type injectors were studied as increasing the Weber number (or injection condition) and the ambient gas pressure to 4.0.MPa. In the case of impinging type injector. we compared the changes of breakup lengths between laminar and turbulent sheets. which are formed by the impingement of laminar and turbulent jets. respectively. The results showed that both sheets expand as increasing the injection velocity irrespective of the ambient gas density when the gas based Weber number is low. When the Weber number is high, however, the breakup of turbulent sheet depends on the hydraulic force of jets as well as the aerodynamic force of ambient gas which determines the breakup of laminar sheet. Using the experimental results. we could suggest empirical models on the breakup lengths of laminar and turbulent sheets. In the case of swirl type injector. as
Keywords
- Breakup Characteristics;
- Breakup Length;
- Impinging Type Injector;
- Swirl Type Injector;
- Linear Instability Theory