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Optical Engineering • new

Combined tunable diode laser absorption spectroscopy and monochromatic radiation thermometry in ammonium dinitramide-based thruster
Author(s): Hui Zeng; Dongbin Ou; Lianzhong Chen; Fei Li; Xilong Yu
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Paper 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.

Paper Details

Date Published: 9 February 2018
PDF: 8 pages
Opt. Eng. 57(2) 026106 doi: 10.1117/1.OE.57.2.026106
Published in: Optical Engineering Volume 57, Issue 2
Show Author Affiliations
Hui Zeng, China Academy of Aerospace Aerodynamics (China)
Dongbin Ou, China Academy of Aerospace Aerodynamics (China)
Lianzhong Chen, China Academy of Aerospace Aerodynamics (China)
Fei Li, Institute of Mechanics (China)
Xilong Yu, Institute of Mechanics (China)
Univ. of Chinese Academy of Sciences (China)


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