NASA is embarking on a new element of its aeronautics research to revolutionize air travel and help combat climate change. The agency's Hybrid Thermally Efficient Core (HyTEC) project aims to improve aircraft engine combustors to ensure the future of commercial flight is cleaner, more efficient, and sustainable.

Under HyTEC, NASA recently awarded a cost-share contract to Pratt and Whitney with a total value of $13.1 million. Pratt and Whitney, based in Hartford, CT, will match or exceed NASA's investment during the contract period. The goal of this collaborative two-year effort is to advance new combustor designs for small-core engines. An aircraft engine's combustor, also known as the combustion chamber, is where fuel is added to compressed air and ignited, creating the high-temperature gas that powers the engine.

As part of this innovative engine combustor work, NASA and Pratt and Whitney will test the performance of these future combustor designs when using sustainable aviation fuels. The HyTEC project will ultimately develop highly efficient jet engines to support the future of sustainable aviation by using less energy, running on renewable fuels instead of fossil fuels, and enabling electrified propulsion for single-aisle commercial aircraft.

"In order to meet the Aviation Climate Action Plan's carbon emissions goals, future single aisle aircraft engines will have to be able to burn sustainable aviation fuels," said Tony Nerone, HyTEC project manager at NASA's Glenn Research Center in Cleveland. "HyTEC's role is to develop these small core engine combustors that are more efficient, more durable, and able to use sustainable aviation fuel without compromising the engine performance and while providing significant emissions benefits."

The United States 2021 Aviation Climate Action Plan predicts the U.S. fleet will grow to use 40 percent more jet fuel by 2050. While efficiency improvements like small core engines help to reduce the fuel demand, sustainable fuels are critical tools in the industry's arsenal to reduce net carbon emissions from commercial aircraft. The anticipated increase in renewable fuel use would significantly reduce global aviation emissions and slow climate change caused by aircraft.

"In the next 30 years, the use of sustainable aviation fuel is the low-hanging fruit to make a major improvement in emissions coupled with all the efficiency improvements from the Sustainable Flight National Partnership," Nerone said. "In fact, sustainable aviation fuel usage is the largest contributor towards the U.S. Climate Action Plan's 2050 carbon emissions goals."

NASA Glenn leads HyTEC and is collaborating with other NASA centers and several industry partners as part of the Sustainable Flight National Partnership, which is working to advance vehicle technologies, improve airline operations, and utilize cleaner fuels.

Top Image: Component-level combustor research, design, and testing enables future, more sustainable small-core turbofan engines. Credits: NASA

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