Abstract
To clarify fundamentals of gravity effect on the behaviors in two-phase flow, experiments were conducted onboard aircraft. Annular flow of air-water mixture was realized independent of gravity level varying along a parabolic trajectory. Effect of gravity on the pressure drop was clarified systematically for vertical upward flow in a tube for different combinations of liquid and gas flow rates. Pressure drop becomes low when gravity is reduced, and the effect of gravity decreases with the increase of gas or liquid flow rate. The gravity effect was corresponded to the change of interfacial shear stress on the surface of annular liquid film, and a method to correlate the gravity effect on interfacial friction factor having direct influence on the pressure drop was introduced.
| Original language | English |
|---|---|
| Pages (from-to) | 83-90 |
| Number of pages | 8 |
| Journal | European Space Agency, (Special Publication) ESA SP |
| Issue number | 454 I |
| Publication status | Published - 2000 |
| Event | 1st International Symposium on Microgravity Research and Applications in Physical Sciences and Biotechnology - Sorrento, Italy Duration: Sept 10 2000 → Sept 15 2000 |
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Space and Planetary Science