The Direct Simulation Monte Carlo (DSMC) method is used to numerically simulate and design a micronozzle with improved performance. Thrust calculations using the DSMC method demonstrate that the coaxial micronozzles can achieve milli-Newton thrust levels with specific impulses on the order of 45 s using argon in a cold gas expansion. Improved micronozzle designs of coaxial microthrusters are also proposed. Coaxial micronozzles utilizing center-body geometries to exploit pressure thrust show about 140% increase in specific impulse at low Reynolds numbers compared to a traditional converging nozzle.
Date of this Version
Stein, William B. and Alexeenko, Alina A., "Application of the DSMC Method for Design of a Coaxial Microthruster Nozzle" (2008). School of Aeronautics and Astronautics Faculty Publications. Paper 34.