Why is it better to run jet engines at high temperatures?

Strong, heat-resistant alloys enable turbine engines to run cleanly and efficiently, explained Michael Mills, professor of materials science and engineering and leader of the project at Ohio State. When an engine can run at very high temperatures, it consumes its fuel more thoroughly and produces lower emissions.

Is hot air good for a turbine engine?

Gas flowing through a typical power plant turbine can be as hot as 2300 degrees F, but some of the critical metals in the turbine can withstand temperatures only as hot as 1500 to 1700 degrees F. Therefore, air from the compressor might be used for cooling key turbine components, reducing ultimate thermal efficiency.

Why is a hotter engine more efficient?

That is why many new engines have active control of coolant temperature: colder at high load, hotter at part-load. This way you can get better performance and better part-load fuel economy. Higher temp at part-load tends to lower friction, lower heat losses, and improves combustion efficiency.

How cold is it at 35000 feet?

At 35,000 feet the air temperature is about -54˚C. Very few would survive such temperatures.

Which engine is most fuel efficient?

Diesel engines generally achieve greater fuel efficiency than petrol (gasoline) engines. Passenger car diesel engines have energy efficiency of up to 41% but more typically 30%, and petrol engines of up to 37.3%, but more typically 20%.

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What company makes the best jet engines?

Table 2: Top Commercial Aircraft Engine Manufacturers According to North American Market Share*

Company Engines Produced in North America
1 CFM International 4,930
2 GE Aviation 4,686
3 Pratt & Whitney 1,849
4 Rolls-Royce 1,580
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