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Electron collection theory for a d-region subsonic blunt electrostatic probe
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wai-Kwong Lai, T. |
| Copyright Year | 1974 |
| Description | Blunt probe theory for subsonic flow in a weakly ionized and collisional gas is reviewed, and an electron collection theory for the relatively unexplored case, Deybye length approximately 1, which occurs in the lower ionosphere (D-region), is developed. It is found that the dimensionless Debye length is no longer an electric field screening parameter, and the space charge field effect can be negelected. For ion collection, Hoult-Sonin theory is recognized as a correct description of the thin, ion density-perturbed layer adjacent the blunt probe surface. The large volume with electron density perturbed by a positively biased probe renders the usual thin boundary layer analysis inapplicable. Theories relating free stream conditions to the electron collection rate for both stationary and moving blunt probes are obtained. A model based on experimental nonlinear electron drift velocity data is proposed. For a subsonically moving probe, it is found that the perturbed region can be divided into four regions with distinct collection mechanisms. |
| File Size | 3214529 |
| Page Count | 150 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740018761 |
| Archival Resource Key | ark:/13960/t8cg4gq99 |
| Language | English |
| Publisher Date | 1974-05-20 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Electron Density Concentration Debye Length Subsonic Flow Electron Mobility Collection Mathematical Models Electrostatic Probes D Region 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 |
