Multi-Jet Effects of Micro-Nozzle Array in Very Low-Power DC Micro-Arcjets
説明
Microfabrication of a 3 x 3 rectangular micro-nozzle array with each exit height of 500 μm using ultra-violet lasers and its operational tests were conducted. Slightly higher thrust and specific impulse were obtained at higher background pressure of 53 Pa. To evaluate thrust characteristics of the array-nozzle, thrust performance was compared with singlenozzles. Significant increases of the thrust and specific impulse with mass flow could be obtained with the array-nozzle case even in the lower background pressure of 4 Pa. A preliminary DSMC computation on internal and exhaust nozzle-flow characteristics of micro-nozzles of multi-nozzle array was also conducted. It was shown that the use of the multi-nozzle array was effective in suppressing expansion of each under-expanding jet, and in inducing axially confined jets, through the interactions of the jet boundaries, or multi-jet effects.
収録刊行物
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- 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
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42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 2006-07-09
American Institute of Aeronautics and Astronautics (AIAA)