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JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 15, NO. 1, FEBRUARY 2006 181 Transient Heat Transfer and Gas Flow in a
 

Summary: JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 15, NO. 1, FEBRUARY 2006 181
Transient Heat Transfer and Gas Flow in a
MEMS-Based Thruster
Alina A. Alexeenko, Dmitry A. Fedosov, Sergey F. Gimelshein, Deborah A. Levin, and
Robert J. Collins, Life Fellow, IEEE
Abstract--Time-dependent performance of a high-temper-
ature MEMS-based thruster is studied in detail by a coupled
thermal-fluid analysis. The material thermal response governed
by the transient heat conduction equation is obtained using the
finite element method. The low-Reynolds number gas flow in
the microthruster is modeled by the direct simulation Monte
Carlo (DSMC) approach. The temporal variation of the thruster
material temperature and gas flowfields are obtained as well as
the thruster operational time limits for thermally insulated and
convectively cooled thrusters. The predicted thrust and mass
discharge coefficient of both two-dimensional (2-D) and three-di-
mensional (3-D) micronozzles decreases in time as the viscous
losses increase for higher wall temperatures. [1046]
Index Terms--Fluid flow, kinetic methods, microfluidics, semi-
conductor device, space vehicle propulsion.

  

Source: Alexeenko, Alina - School of Aeronautics and Astronautics, Purdue University

 

Collections: Engineering