Microwave Ignition of HAN-Based Monopropellants

Period of Performance: 12/10/2004 - 12/10/2006


Phase 2 SBIR

Recipient Firm

Sienna Technologies, Inc.
19501 144th Avenue NE Array
Woodinville, WA 98072
Principal Investigator


This SBIR program will demonstrate the potential of microwaves to repeatedly and controllably ignite the USAF developed HAN-based monopropellants We will continue microwave ignition experiments in the S-band to determine precise time-to-ignition for the selected monopropellant at a given microwave power. We will carry out complex permittivity measurements on the selected HAN-based monopropellant in the X- and K-bands to explore the possibility of microwave ignition in these regions. Operating in X- or K-bands reduces the system size and weight. Microwave ignition experiments in the X- and/or K-bands will be performed to establish if time-to-ignition and/or microwave power requirements could be reduced using a more compact ignition system. A conceptual rocket engine design incorporating the proposed microwave ignition system will be presented.