Document Type : Original Article
Authors
1
assistant professor ،Iranian space research center,,Tabriz, Iran
2
Master's degree, ،Iranian space research center,,Tabriz, Iran
3
PhD student, Space Propulsion Research Institute, Tabriz, Iran
Abstract
Resistojet thrusters are considered one of the important of the electric thrusters, which have special characteristics such as thrust to power ratio, reliability and relatively high output propellant speed. These thrusters generate thrust by passing the propellant around an electric heater and increasing its temperature, and then passing the propellant through a convergent-divergent nozzle to accelerate the propellant. In this article, satellites that have a resistojet system, from the point of view of purpose and application, peak height, mass, and the platform used, have been statistically investigated and the results have been compared. Also in the existing resistojet propulsion systems have been evaluated based on three key parameters of reliability, manufacturing technology, and identification and selection of suitable materials. According to the results of the study of 14 studied mechanisms, 100 watt, high temperature, millipound thrusters, vaporizer based design, SSTL company's first and second design, extension heater thruster and Mark 3 satellite thruster in terms of technology level used in the technology group . Among these seven mechanisms, the thruster mechanism of the second design of SSTL company and the thruster with extension heater are removed due to the difficulty of supplying materials. The remaining five mechanisms all have a maximum of 10 elements and no need for pressure increase / decrease equipment, they have been evaluated at a suitable level in terms of reliability. The mechanism of the first design of SSTL company has the most suitable conditions for operation due to having 5 elements in the thruster head.
Keywords
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