Electrojets for More Efficient Small-Satellite Propulsion

Enables Greater Propulsion Magnitude and Decreases Power Consumption

This electrojet device enhances the propulsion properties of small satellites. Thrust -- the force which moves all aircraft through the air -- is generated through propulsion systems. In small satellites floating in space, these systems need to be both small in size and able to generate adequate impulses in near-vacuum condition so that satellites can remain in orbit for extended periods of time. It has become increasingly important that the design allows for greater thrust outputs with less power usage. Accurate control over propulsion impulses is also highly desirable, as it makes the satellite more efficient, extends the duration of the flight and decreases potential satellite failures. Researchers at the University of Florida have created an electrojet propulsion system capable of overcoming market inefficiencies, producing sufficient thrust outputs while reducing power requirements. The product offers unparalleled control over propulsion and produces highly desirable, specific impulses for more efficient maneuvering of these expensive, valuable satellites.

Application

Electrojet for small-satellite propulsion

Advantages

• Increases propulsion magnitude by increasing specific impulse, providing more thrust power and allowing for longer expeditions
• Decreases power consumption, reducing energy costs
• Improves propulsion control, decreasing costs associated with damaged or lost satellites

Technology

Resistojet propulsion systems pass a propellant (typically gas) through an expansion slot with heated walls. As the gas molecules become more heated, their energy increases, and they pass through the expansion slot with greater speed, producing the thrust and specific impulse necessary to power satellites. The proposed electrojet works in a similar manner, but an electrohydrodynamic (EHD) body force allows the user to control the propellant’s flow through the chamber/expansion slot, increasing the specific impulses created. Because the user can control the flow of the propellant into, out of, or through the chamber, the propulsion system is more efficient. It wastes considerably less energy and power when used properly. A more efficient design allows for greater emissions of thrust. This device, useful with a variety of propellants, offers unparalleled advantages for propulsion control and, due to its small size, is exactly the product needed for the next phase of small satellite system expansion.