Related Experiment Videos
Visualization studies of an acoustically excited liquid sheet
Vayalakkara Sivadas1, Manuel V Heitor
1Laboratory of Thermofluids, Combustion and Energy Systems, Center for Innovation, Technology and Policy Research, Instituto Superior Técnico, Technical University of Lisbon, Portugal. das@dem.ist.utl.pt
Annals of the New York Academy of Sciences
|December 24, 2002
Summary
Acoustic excitations enhance liquid sheet disintegration by overcoming insufficient airflow. Perturbing the liquid core at optimal frequencies improves atomization efficiency.
Area of Science:
- Fluid dynamics
- Acoustics
- Aerosol science
Background:
- Liquid sheet disintegration is crucial for atomization processes.
- Reducing airflow is desirable for efficiency but limits atomization effectiveness.
- The inner liquid core requires external influence for enhanced breakup.
Purpose of the Study:
- To investigate the use of acoustic excitations to enhance liquid sheet disintegration.
- To determine the effect of acoustic perturbations on the intact liquid core.
- To improve atomization efficiency by overcoming airflow limitations.
Main Methods:
- Employing a plane laminar liquid sheet.
- Applying acoustic excitations at an optimum frequency.
- Utilizing impinging air streams to introduce perturbations.
Main Results:
- Acoustic excitations successfully influenced the intact liquid core.
- Perturbations at optimum frequencies promoted larger amplitude waves.
- Enhanced liquid disintegration was observed.
Conclusions:
- Acoustic excitation is an effective method to enhance liquid sheet disintegration.
- Optimizing acoustic frequency is key to improving atomization.
- This method offers a way to improve atomization with reduced airflow.