Hybrid rocket fuel research being done by a University of Alabama in Huntsville (UAH) mechanical engineering doctoral student could hasten the day when a simpler, safer, more economical rocket engine propels space missions.
At UAH’s Johnson Propulsion Center, Matthew Hitt has experimented with varying solid fuel grain sizes to see how they burn at different combustion chamber pressures and oxidizer flow rates in an effort to improve the performance of hybrid engines.
“This is another step in making hybrids – which are a safer alternative to either solid or liquid engines – more practical for actual application,” he says.
Advised by Dr. Robert Frederick, director of UAH’s Propulsion Research Center, Hitt attended the 2015 Combustion Summer School at Princeton University and has submitted a paper on his work to the American Institute of Aeronautics and Astronautics 2015 Propulsion and Energy Forum, set for July 27-29 in Orlando, Fla.
Improving the efficiency has to do with improving the fuel regression rate – a scientific way of saying you get the solid fuel to burn faster so it recedes back from the flame front at a faster rate.
“By increasing the fuel regression rate – which can lead to simpler designs – you are leaving less unburned fuel, so you are not carrying all this dead weight,” Hitt says.
Not having to carry fuel that won’t end up getting burned could reduce the weight of the rocket, allow for use of a smaller engine for the same flight result, or allow for a larger payload due to the weight savings.
Perfecting hybrid engines has been intriguing to rocket scientists globally because of the tantalizing benefits a hybrid engine offers over both conventional solid rocket engines and over liquid fuel/liquid oxidizer engines.
Rather than having a valuable human or satellite payload sitting atop two premixed solid propellants that could explode if accidentally ignited, in a hybrid engine one propellant is a solid and the other is a liquid.
“You’re not sitting on a bomb,” says Hitt. Having half the combustion equation as a solid beats a liquid/liquid combination in weight and cost savings, because half of the valves and associated equipment needed to pressurize and control liquids are eliminated. And unlike a solid fuel engine, a hybrid can be throttled and shut down.
The Latest on: Hybrid rocket engines
via Google News
The Latest on: Hybrid rocket engines
- First Drive: 2021 Toyota Siennaon November 29, 2020 at 9:07 pm
Toyota Sienna is on the verge of being released here in Canada, and if it’s information you’re looking for then we’ve got you covered: we’ve already taken a deep dive into the redesigned interior, and ...
- These Are The Best Hatchbacks Of 2020on November 25, 2020 at 7:49 pm
From affordable commuters to cool pocket rockets, 2020 has given us a plethora of new and exciting hatchbacks. Here are the 10 best ones.
- Firehawk Aerospace Raises $2M in Fundingon November 25, 2020 at 5:07 am
Firehawk Aerospace, a Melbourne, FL-based rocket propulsion startup, closed a $2m seed funding round. The round was led by members of the Victorum Capital Club and included additional investments from ...
- Firehawk Aerospace Raises $2 Million for Next Generation Rocket Engineson November 24, 2020 at 2:28 pm
Firehawk Aerospace custom designs and manufactures high performance rocket engines powered by 3D printed rocket fuel. MELBOURNE, Fla. (PRWEB) November 24, 2020 ...
- Hybrid Rocket Engine Uses Acrylic As Fuelon November 16, 2020 at 3:59 pm
We are fascinated by the hybrid rocket engine which [Ben Krasnow] built and tested in his shop. It is actually using a hollow cylinder of acrylic as the fuel, with gaseous oxygen as an oxidizer.
- New Ferrari SF90 Spider puts a 211-mph hurricane of wind in your hairon November 13, 2020 at 9:41 am
The SF90 Spider thus becomes Ferrari's first plug-in-hybrid roadster ... Spider maintains the Stradale's 211-mph top speed, and it rockets from 0 to 62 mph in 2.5 seconds. Like other Ferrari ...
- Ferrari unleashes its first convertible hybrid supercar - the 211mph SF90on November 12, 2020 at 5:31 am
In Hybrid mode the car's on board computer decides, for optimal efficiency, whether to keep the petrol engine running or turn it off. Power flow from the electric motors is limited to conserve ...
- Blue Origin and Aerojet get in on NASA partnerships for new space technologieson November 9, 2020 at 10:29 pm
The second project aims to improve rocket engine designs by incorporating metal ... with Goddard Space Flight Center to develop a new hybrid propellant of “green” ionic liquid and conventional ...
- Launch set this month at New Mexico spaceporton November 7, 2020 at 6:35 pm
when a mother ship will haul an aircraft from the spaceport to about 50,000 feet and release it — at which point a hybrid rocket engine will propel it to the edge of space before it glides back ...
- ESA gives Boost! to commercial space transportationon November 6, 2020 at 6:51 am
The launch vehicle, called SL1, will be powered by green hybrid propulsion ... the-art staged-combustion engine technology for its main propulsion systems. Under the ‘RFA One Launch Service ...
via Bing News