9 February 2018 Combined tunable diode laser absorption spectroscopy and monochromatic radiation thermometry in ammonium dinitramide-based thruster
Author Affiliations +
Abstract
Nonintrusive temperature measurements for a real ammonium dinitramide (ADN)-based thruster by using tunable diode laser absorption spectroscopy and monochromatic radiation thermometry are proposed. The ADN-based thruster represents a promising future space propulsion employing green, nontoxic propellant. Temperature measurements in the chamber enable quantitative thermal analysis for the thruster, providing access to evaluate thermal properties of the thruster and optimize thruster design. A laser-based sensor measures temperature of combustion gas in the chamber, while a monochromatic thermometry system based on thermal radiation is utilized to monitor inner wall temperature in the chamber. Additional temperature measurements of the outer wall temperature are conducted on the injector, catalyst bed, and combustion chamber of the thruster by using thermocouple, respectively. An experimental ADN thruster is redesigned with optimizing catalyst bed length of 14 mm and steady-state firing tests are conducted under various feed pressures over the range from 5 to 12 bar at a typical ignition temperature of 200°C. A threshold of feed pressure higher than 8 bar is required for the thruster’s normal operation and upstream movement of the heat release zone is revealed in the combustion chamber out of temperature evolution in the chamber.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hui Zeng, Hui Zeng, Dongbin Ou, Dongbin Ou, Lianzhong Chen, Lianzhong Chen, Fei Li, Fei Li, Xilong Yu, Xilong Yu, } "Combined tunable diode laser absorption spectroscopy and monochromatic radiation thermometry in ammonium dinitramide-based thruster," Optical Engineering 57(2), 026106 (9 February 2018). https://doi.org/10.1117/1.OE.57.2.026106 . Submission: Received: 11 November 2017; Accepted: 16 January 2018
Received: 11 November 2017; Accepted: 16 January 2018; Published: 9 February 2018
JOURNAL ARTICLE
8 PAGES


SHARE
Back to Top