Temperature Measurements in An Ammonium Dinitramide (ADN)Based Monopropellant Thruster by Using Laser Absorption Spectroscopy and Monochromatic Radiation Thermometry

摘要

This work presents an attempt to quantitatively obtain the thermal process inside the thruster so as to analyze its thermal performance.A combined temperature measurement system by using laser-based sensor and monochromatic thermometry are performed to monitor temperature of combustion gas and inner wall of chamber in a real ADN based thruster.Measured gas temperature reaches an equilibrium value of 1500 K and time-resolved measurements of inner-wall temperature were in great consistence with measured gas temperature with a time delay,which increased as the feed pressure reduced.