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New green hypergolic propellant – potential gamechanger for in-space propulsion

Source: Łukasiewicz – Institute of Aviation

While green storable high-performance hypergolic propellants have been the Holy Grail of space propulsion for decades, engineers and scientists from Łukasiewicz – Institute of Aviation (Łukasiewicz – ILOT) have successfully completed the key development step required to solve the challenge.

 

New propellant for future space missions

The developed propellant combination uses 98% hydrogen peroxide as oxidizer with a novel fuel. Its hypergolic properties make it perfect for steady-state and impulse operations. Being an alternative to heritage solutions and having a vacuum-specific impulse of 310 seconds, it is gaining wide commercial interest. Its use in bipropellant thrusters proved no issues, unlike in many previous international developments of this kind. The next efforts will be focused on introducing this innovative technology to new systems under development by key space system integrators.

The propellant developed at Łukasiewicz ILOT is a safer alternative for personnel and the environment to the toxic materials currently in use hydrazine derivatives and nitrogen oxides. The developed combination uses hydrogen peroxide (with a concentration of 98%) as oxidizer with a novel fuel.

 

 

It is characterized by high performance a specific impulse in a vacuum of 310 seconds, as well as hypergolicity, i.e. the ability to spontaneously ignite when the components get into contact in the combustion chamber.  It is an ideal candidate for use in rocket engines for future satellite platforms, landers and upper stages of launch vehicles.

The development of a new propellant combination is a long process requiring extensive interdisciplinary testing. Out team achieved this milestone, which may ultimately allow for decreasing costs of new propulsion systems, as well as costs of satellite launch preparations. This takes us one step closer to the goal of Polish fuel becoming a standard for next generation European spacecraft – says Dr Adam Okninski, director of the Space Technologies Center at Łukasiewicz – Institute of Aviation.

 

While green storable high-performance hypergolic propellants have been the Holy Grail of space propulsion for decades, engineers and scientists from Łukasiewicz – Institute of Aviation (Łukasiewicz – ILOT) have successfully completed the key development step required to solve the challenge.
Test of a rocket engine with a thrust of 20 N and hypergolic ignition, using the developed fuel and hydrogen peroxide as an oxidant. Photo: Łukasiewicz – Institute of Aviation.

 

 

Key features:

Specific impulse in vacuum is approximately 310 seconds performance is comparable to currently used solutions.

High density requires smaller, lighter tanks and feeding systems in comparison to other propellants.

Hypergolicity ignites upon contact with 98% hydrogen peroxide without the need for additional ignition sources, simplifying the engine’s design and allowing for multiple uses.

Fast and repeatable ignition allows for use in small thrusters that require short and extremely precise thrust pulses for satellite attitude control.

Widely available and used in the industry no need for rigorous safety procedures compared to other propellants.

• Application in satellite propulsion (satellite thrusters) as well as in upper stages of launch vehicles (ease of multiple engine reignitions and shutdowns during maneuvers required to reach the target orbit).

 

While green storable high-performance hypergolic propellants have been the Holy Grail of space propulsion for decades, engineers and scientists from Łukasiewicz – Institute of Aviation (Łukasiewicz – ILOT) have successfully completed the key development step required to solve the challenge.
Long-term test of a 20 N hypergolic ignition engine using the developed fuel and hydrogen peroxide as an oxidant. Photo: Łukasiewicz – Institute of Aviation.

 

 

Further research and development

The team of engineers and scientists at Łukasiewicz – ILOT has so far conducted over 160 tests of the new propellant using a 20 N thrust engine, designed for satellite propulsion, with a cumulative running time of 2 minutes. The shortest engine firings lasted 10 milliseconds, meeting the requirements of satellites in terms of generating short precise thrust pulses. Some of the engine tests were carried out as a part of  “10-20N Green Bipropellant Thruster” project funded by the European Space Agency.

 

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Highly repeatable ignition characteristics and stable and reproducible combustion were obtained. The new propellant is the result of testing several hundred different combinations of chemical compounds and the optimization of compositions was conducted at Łukasiewicz ILOT.

Future work will focus on implementing this innovative technology into new systems and subsystems being developed by key satellite integrators operating in the European and global markets.

 

While green storable high-performance hypergolic propellants have been the Holy Grail of space propulsion for decades, engineers and scientists from Łukasiewicz – Institute of Aviation (Łukasiewicz – ILOT) have successfully completed the key development step required to solve the challenge.
Drop Test – an experiment showing the hypergolic nature of the newly developed fuel when in contact with 98% hydrogen peroxide. Photo: Łukasiewicz – Institute of Aviation.

 

Space specializations

Łukasiewicz Institute of Aviation is one of the most advanced research facilities in Europe, with traditions dating back to 1926. The institute closely collaborates with global aviation industry leaders such as Boeing, GE, Airbus, and Pratt & Whitney, as well as institutions in the space industry, including the European Space Agency. The institute’s strategic research areas include aviation, space, and unmanned technologies. It also conducts research and provides services for domestic and foreign industries in the fields of material, composite, additive, remote sensing, energy, and mining technologies.

Currently, the institute is involved in 30 research projects in the field of space technology, with about half of them in collaboration with the European Space Agency. Within national projects, it participates in the development of a Polish optoelectronic satellite constellation (PIAST project) within the SZAFIR program of the National Center for Research and Development.

 

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In the area of space technology, the institute specializes in research and development of rocket technology, satellite propulsion, deorbiting modules and green propellants.

The institute is developing its own suborbital rocket, the ILR-33 BURSZTYN 2K. The basic version of the rocket has been successfully flight-tested, becoming the world’s first system to use hydrogen peroxide at a concentration exceeding 98% as a propellant.

 

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