Heater Chip with Different Microchannels Geometries for a Low Pressure Free Molecular Micro-Resistojet

摘要: This paper presents a dynamic system approach for the modeling of fluid flow in microchannels to be used thrust control applications. A micro-resistojet fabricated using MEMS (Microelectromechanical Systems) technology has been selected analysis. The device operates by vaporizing liquid propellant, this case water, and expelling it as gas that is accelerated micro-nozzle. pressure variation due boiling chamber might lead unwanted behavior feed frequency analysis can indicate whether or not instabilities will present. To handle complex problem, incompressible Navier-Stokes equations are linearized steady-state regime then formulated state space form provide necessary means Controllability observability investigated considering low values Reynolds numbers present micro fluidics Results from analytical treatment compared with CFD (Computational Fluid Dynamics) simulations microchannel demonstrate validity investigated.