Drop/Gas Interactions of Dense Sprays
Final technical rept. 1 Apr 1999-30 Sep 2001
MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING
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Turbulence generation and secondary drop breakup were studied. Turbulence generation is due to the motion of high-speed dispersed phases through continuous phases. Secondary drop breakup intrinsically follows primary liquid breakup in sprays. Measurements showed that flows caused by turbulence generation consisted of dispersed phase wakes involving laminar-like turbulent wakes surrounded by a turbulent interwake region involving isotropic turbulence in the final decay region. These measurements provided information about the properties of both of these regions. Measurements also provided the temporal properties of secondary drop deformation and breakup for shock wave disturbances at large liquid-gas density ratios. Numerical simulations yielded corresponding information at conditions more representative of practical combustion chambers that would be difficult to address with physical experiments.
- Fluid Mechanics