Abstract
The micro-propulsion ground experimental system is composed of propellant supply and control unit, high performance DC power supply and control unit, virtual instrument measuring and control unit and resistojets, etc. Working characteristics and performances of free molecular micro-resistojets were investigated under the atmosphere condition by designing and processing free molecular micro-resistojets (FMMR) and establishing micro-propulsion ground experimental system. The testing results were compared with those from theoretical analysis and numerical simulation calculation. The results show that the membrane temperature sensors and membrane heaters can stably work under the atmosphere condition, and when the input power is 14.6 W and operating pressure is 100 Pa, operating temperature can be up to 600 K. When N2 is taken as propellant working medium, mass flow can be up to 3.720 mg/s, specific impulse 54.254 s and thrust 1.979 mN. When H2O is taken as the working medium, mass flow can be up to 2.976 mg/s, specific impulse 68.163 s and thrust 2.000 mN. All property parameters of FMMR are consistent with theoretical analysis results. Through design optimization and system integration, performances of FMMR can be improved further.
| Original language | English |
|---|---|
| Pages (from-to) | 83-86+90 |
| Journal | Guti Huojian Jishu/Journal of Solid Rocket Technology |
| Volume | 28 |
| Issue number | 2 |
| State | Published - Jun 2005 |
Keywords
- Free molecular micro-resistojet
- Input power
- Micro-electromechanical systems
- Micropropulsion ground experimental system
- Specific impulse