DISCLAIMER: This article is being kept online for historical purposes. Though accurate at last review, it is no longer being updated. The page may contain broken links or outdated information.
Unducted fans for aircraft propulsion
Murrow, Kurt Advanced Technology and Preliminary Design Division, GE Aviation, Cincinnati, Ohio.
Breeze-Stringfellow, Andrew Advanced Technology and Preliminary Design Division, GE Aviation, Cincinnati, Ohio.
Wojno, John Advanced Technology and Preliminary Design Division, GE Aviation, Cincinnati, Ohio.
- Performance advantage
- Fan aerodynamic innovation
- Modern blade design
- Unducted fan noise physics
- Acoustic progress and challenges
- Additional Reading
The application of the gas turbine toward aviation propulsion, leading to the turbojet engines of Frank Whittle and Hans Von Ohain in the late 1930s, redefined aviation transportation for generations to come. The turbojet supplanted the then prevalent internal combustion engine technology with a simple, lightweight, and low-cost alternative. It allowed aircraft to climb to altitudes well beyond those attainable for a conventional internal combustion engine. It also enabled flight speeds to advance from the low subsonic arena of propeller-driven airplanes into the high subsonic and supersonic flight regimes. However, the benefit of increased flight speed offered by the turbojet came at the expense of reduced propulsive efficiency. Propulsive efficiency is a measure of how well jet exhaust power is transferred to the airplane. A slow-turning propeller imparting a small change in velocity over a large stream of air had been replaced with a small but high-velocity airflow to produce thrust.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information