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Flow friction of the turbulent coolant flow in cryogenic porous cables
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hendricks, R. C. Zaichik, L. I. Yanovsky, L. S. Yeroshenko, V. M. |
| Copyright Year | 1979 |
| Description | Considered are cryogenic power transmission cables with porous cores. Calculations of the turbulent coolant flow with injection or suction through the porous wall are presented within the framework of a two-layer model. Universal velocity profiles were obtained for the viscous sublayer and flow core. Integrating the velocity profile, the law of flow friction in the pipe with injection has been derived for the case when there is a tangential injection velocity component. The effect of tangential velocity on the relative law of flow friction is analyzed. The applicability of the Prandtl model to the problem under study is discussed. It is shown that the error due to the acceptance of the model increases with the injection parameter and at lower Reynolds numbers; under these circumstances, the influence of convective terms in the turbulent energy equation on the mechanism of turbulent transport should be taken into account. |
| File Size | 961602 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790012170 |
| Archival Resource Key | ark:/13960/t3518t15b |
| Language | English |
| Publisher Date | 1979-01-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Flow Equations Cryogenic Equipment Turbulent Flow Porous Materials Coolants Flow Resistance Velocity Distribution Power Lines Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
