Jet Noise Abatement Technologies for the Republic of Korea Air Force
AIR COMMAND AND STAFF COLL MAXWELL AFB AL MAXWELL AFB United States
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Although the noise levels of commercial jet airliners have been decreasing, the noise levels of tactical jet aircraft have stayed high as these jet fighters display high performance capabilities with powerful engines producing added thrust, and have not been able to adopt higher bypass ratio turbofan engines. Since most Republic of Korea Air Force ROKAF bases are located very close to large cities, the ROKAF is not only criticized as a main source of the communitys annoyance with jet noise, but also has suffered from limitations to air operations and training. In addition, the South Korean government is burdened with financial compensation. Noise reduction technology will address these issues, as well as improve the advanced stealth technology for ROKAFs next generation jet fighter KF-X.For these reasons, ROKAF must obtain noise abatement technology with a long-term perspective. Considering the lack of knowledge about jet noise, ROKAF could learn about such technology from other countries efforts and lessons learned. Several U.S. military and civil institutions have invested in research to develop quieter aircraft. Their research identified the main source of jet noise, and implemented novel technologies such as the chevron nozzle and plasma actuator to reduce jet noise.