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Arcjet nozzle area ratio effects (Document No: 19920006804)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kwasny Sr., James Birkner, Bjorn W. Curran, Francis M. Sarmiento, Charles J. |
| Copyright Year | 1990 |
| Description | An experimental investigation was conducted to determine the effect of nozzle area ratio on the operating characteristics and performance of a low power dc arcjet thruster. Conical thoriated tungsten nozzle inserts were tested in a modular laboratory arcjet thruster run on hydrogen/nitrogen mixtures simulating the decomposition products of hydrazine. The converging and diverging sides of the inserts had half angles of 30 and 20 degrees, respectively, similar to a flight type unit currently under development. The length of the diverging side was varied to change the area ratio. The nozzle inserts were run over a wide range of specific power. Current, voltage, mass flow rate, and thrust were monitored to provide accurate comparisons between tests. While small differences in performance were observed between the two nozzle inserts, it was determined that for each nozzle insert, arcjet performance improved with increasing nozzle area ratio to the highest area ratio tested and that the losses become very pronounced for area ratios below 50. These trends are somewhat different than those obtained in previous experimental and analytical studies of low Re number nozzles. It appears that arcjet performance can be enhanced via area ratio optimization. |
| File Size | 5832630 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920006804 |
| Archival Resource Key | ark:/13960/t9b61gn80 |
| Language | English |
| Publisher Date | 1990-01-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Rocket Nozzles Electric Potential Performance Tests Electric Rocket Engines Nozzle Inserts Arc Jet Engines Communication Satellites Convergent-divergent Nozzles Optimization Spacecraft Propulsion Nozzle Geometry Conical Nozzles Mass Flow Rate Tungsten Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
