Development of a HTP Mono-propellant Thruster by Using Composite Silver Catalyst

Chan, Yung-An; Hsu, Hsiang‐Chin; Chao, Yei Chin

doi:10.2514/6.2011-5693

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…The most significant technology challenge for the realization of hydrogen peroxide monopropellant thrusters is the development of effective, reliable, long-lived catalytic beds, providing fast and repeatable performance, capable of sustaining the large number Although peroxide hydrogen catalysts are not completed like a hydrazine catalyst (shell 405) but some suitable ones are known and developed based on composite silver catalyst (Chan et al, 2011). Similar catalyst is considered in this study.…”

Section: Catalystmentioning

confidence: 99%

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Multi-modular design optimization and multidisciplinary design optimization

Adami

Mortazavi

Nosratollahi

2015

International Journal of Intelligent Unmanned Systems

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Purpose – For complex engineering problems, multidisciplinary design optimization (MDO) techniques use some disciplines that need to be run several times in different modules. In addition, mathematical modeling of a discipline can be improved for each module. The purpose of this paper is to show that multi-modular design optimization (MMO) improves the design performances in comparison with MDO technique for complex systems. Design/methodology/approach – MDO framework and MMO framework are developed to optimum design of a complex system. The nonlinear equality and inequality constrains are considered. The system optimizers included Genetic Algorithm and Sequential Quadratic Programming. Findings – As shown, fewer design variables (optimization variables) are needed at the system level for MMO. Unshared variables are optimized in the related module when shared variables are optimized at the system level. The results of this research show that MMO has lower elapsed times (14 percent) with lower F-count (16 percent). Practical implications – The monopropellant propulsion upper-stage is selected as a case study. In this paper, the efficient model of the monopropellant propulsion system is proposed. According to the results, the proposed model has acceptable accuracy in mass model (error < 2 percent), performance estimation (error < 6 percent) and geometry estimation (error < 10 percent). Originality/value – The monopropellant propulsion system is broken down into the three important modules including propellant tank (tank and propellant), pressurized feeding (tank and gas) and thruster (catalyst, nozzle and catalysts bed) when chemical decomposition, aerothermodynamics, mass and configuration, catalyst and structure have been considered as the disciplines. The both MMO and MDO frameworks are developed for the monopropellant propulsion system.

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Section: Catalystmentioning

confidence: 99%

Section: Catalystmentioning

confidence: 99%

Multi-modular design optimization and multidisciplinary design optimization

Adami

Mortazavi

Nosratollahi

2015

International Journal of Intelligent Unmanned Systems

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“…In spite of that, it carries major difficulties due to its life span issue as it is found to be easily deteriorate when decomposed with hydrogen peroxide; hence, limiting the life of the catalyst bed itself [16]. Even though silver is said as the best catalyst for HTP in term of catalytic performance, but due to its low melting point (compared to other catalyst) it will tend to sinter during the decomposition reaction takes place [16]. This led to incomplete decomposition in cold start and oscillation in chamber pressure where it will eventually induce flow instability of the supplying system [16].…”

Section: Silver Catalystmentioning

confidence: 99%

“…HTP (roughly more than 85 wt.% concentration) has many usages in aerospace application especially as a green propellant option [8,16]. It has many advantages over other type of conventional hydrazine-based propellant in terms of storing, workability and environment.…”

Section: Introductionmentioning

confidence: 99%

Porosity Effect of the Silver Catalyst in Hydrogen Peroxide Monopropellant Thruster

Shahrin

Othman

Mohd

et al. 2021

CFDL

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In monopropellant system, hydrogen peroxide is used with catalyst to create an exothermic reaction. Catalyst made of silver among the popular choice for this application. Since the catalyst used is in porous state, the effect of its porosity in the hydrogen peroxide monopropellant thruster performances is yet unknown. The porosity changes depending on factors including catalyst pact compaction pressure, bed dimension, and type of catalyst used. As researches on this topic is relatively small, the optimum porosity value is usually left out. The performance of the thruster indicated by the pressure drop across the catalyst bed. Porosity of the catalyst bed adds additional momentum sink to the momentum equation that contributes to the pressure gradient which lead to pressure loss inside thruster. The effect of porosity influences the performance and precision of the thruster. Study of the pressure drop by the catalyst bed requires a lengthy period and expensive experiments, however, numerical simulation by mean of Computational Fluid Dynamics (CFD) can be an alternative. In this paper, 90 wt% hydrogen peroxide solution with silver catalyst is studied in order to investigate the influence of porosity to the performances of the thruster, and to find the optimum porosity of the thruster. Species transport model is applied in the single-phase reaction simulation using the EDM for turbulence-chemistry interaction. Through this study, the effect of porosity towards the thruster performances represented in term of pressure drop, exit velocity, bed temperature, and thrust, and porosity of 0.4 found to be as an optimal value.

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“…Steel structure is commonly used for the thruster. [17]. Similar catalyst is considered in this study.…”

Section: Thruster Modelingmentioning

confidence: 99%

Multidisciplinary Design Optimization of Hydrogen Peroxide Monopropellant Propulsion System using GA and SQP

Adami¹,

Mortazavi²,

Nosratollahi³

2015

IJCA

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An intense simplification in production, storage and handling of hydrogen peroxide develop a renewed interest in hydrogen peroxide thrusters especially for low cost attitude control or orbit correction (orbit maintenance). Chemical decomposition, aerothermodynamics flow and structure demand different optimum conditions such as tank pressure, catalyst bed pressure, concentration of H 2 O 2 and geometry. These parameters play important role in propulsion system's mass and performance. Discipline conflicts are solved by Multidisciplinary Design Optimization (MDO) techniques with synchronized optimization for all subsystems respect to any criteria and limitations. In this paper, monopropellant propulsion system design optimization algorithm is presented and result of the design algorithm is validated. Results of the design algorithm have been compared with data of two different operational thrusters. According to the results, the proposed model can suitably predict total mass and performance with errors below than 10%. Then, MDO framework is proposed for the monopropellant propulsion system. Optimum propellant mass, thrust level, mass flow rate, nozzle geometry, catalyst bed length and diameter, propellant tank mass, feeding subsystem mass and total mass are derived using hybrid optimization (GA+SQP) for two space missions.

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Development of a HTP Mono-propellant Thruster by Using Composite Silver Catalyst

Cited by 7 publications

References 4 publications

Multi-modular design optimization and multidisciplinary design optimization

Multi-modular design optimization and multidisciplinary design optimization

Porosity Effect of the Silver Catalyst in Hydrogen Peroxide Monopropellant Thruster

Multidisciplinary Design Optimization of Hydrogen Peroxide Monopropellant Propulsion System using GA and SQP

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