Loading...
Please wait, while we are loading the content...
Similar Documents
Mixing-induced fluid destratification and ullage condensation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Fortini, Anthony F. Meserole, Jere S. Jones, Ogden S. |
| Copyright Year | 1987 |
| Description | In many applications, on-orbit storage and transfer of cryogens will require forced mixing to control tank pressure without direct venting to space. During a no-vent transfer or during operation of a thermodynamic vent system in a cryogen storage tank, pressure control is achieved by circulating cool liquid to the liquid-vapor interface to condense some of the ullage vapor. To measure the pressure and temperature response rates in mixing-induced condensation, an experiment has been developed using Freon 11 to simulate the two-phase behavior of a cryogen. A thin layer at the liquid surface is heated to raise the tank pressure, and then a jet mixer is turned on to circulate the liquid, cool the surface, and reduce the pressure. Many nozzle configurations and flow rates are used. Tank pressure and the temperature profiles in the ullage and the liquid are measured. Initial data from this ground test are shown correlated with normal-gravity and drop-tower dye-mixing data. Pressure collapse times are comparable to the dye-mixing times, whereas the times needed for complete thermal mixing are much longer than the dye-mixing times. |
| File Size | 594487 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870011716 |
| Archival Resource Key | ark:/13960/t4pk58p9g |
| Language | English |
| Publisher Date | 1987-04-01 |
| Access Restriction | Open |
| Subject Keyword | Materials Processing Nozzle Geometry Mixing Fuel Tank Pressurization Interface Stability Aerospace Environments Fluid Management Vapors Cryogenic Fluid Storage Venting Ullage Condensation Liquid Sloshing Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
