Document Type : Original Article
Authors
- Nooredin Ghadiri Massoom 1
- alireza rajabi 2
- mohamad ali amirifar 2
- Zahra Amirsardari 3
- Akram Dourani 3
- majid kamranifar 2
1 Researcher/Iranian Space Research Center
2 Iranian Space Research Center
3 Space Transportation Research Institute
Abstract
In this paper, the effects of different weight percentage of iridium (Ir) nanoparticles loadings on performance parameters of hydrazine catalyst and monopropellant thruster have been studied. Nanoparticles of iridium with different contents of 10 wt%, 20 wt%, and 30 wt% has been coated on gamma-alumina of 1 to 2 mm size for decomposition of hydrazine during some various steps of calcination. These catalysts then have been tested in a 1 N thruster. The tests were conducted using a scenario of different stages of steady and pulsating fires of different times and duty cycles. The test results showed that catalyst loss was minimum with 30 wt% of iridium nanoparticles loading. Despite of this, there were no meaningful difference between other parameters such as pressure roughness, thrust, specific impulse, and catalyst crushing. The results showed a good value of characteristic velocity. All parameter values of three type of catalysts were in the expected and desired range
Keywords
- Iridium Nanoparticles# Loading# Weight percentage# γ
- alumina core# Hydrazine dissociation# Monoproellant thruster
Main Subjects
## T. W. Price and D. D. Evans, "The Status of Monopropellant Hydrazine Technology," NASA, JPL, Pasadena (USA), 1968.##
## P. McRight, C. Popp, C. Pierce, A. Turpin and W. Urba, "Confidence testing of shell-405 and s-405 catalysts in a monopropellant hydrazine thruster," in 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Tucson, 2005. ##
## D. Goto, H. Kagawa, S. Murayama, K. Kajiwara, H. Ikeda, N. Shinozaki and E. Yabuhara, "Endurance Firing Teat Results of the Long Life 1N Hydrazine Thruster," in 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, California, 2011. ##
## I. Jang, H. Shin, N. Shin, S. Kim, S. Ki and S. Cho, "Macroporous–mesoporous alumina supported iridium catalyst for hydrazine decomposition," Catalysis Today, vol. 185, no. 1, p. 198, 2012. ##
## Z. Amirsardari, A. Dourani, M. A. Amirifar and N. Ghadiri Massoom, "Comparative characterization of iridium loading on catalyst assessment under different conditions," International Journal of Minerals , Metallurgy and Materials, vol. 28, pp. 1-7, 2021. ##
## B. W. Schmitz and W. W. Wilson, "Long Life Monopropellant Hydrazine Engine Development Program," Air Force Rocket Propulsion Laboratory, Edwards, California, 1971.##
)