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http://dx.doi.org/10.5139/JKSAS.2015.43.3.204

Investigation of the Effects of UAV Nozzle Configurations on Aircraft Lock-on Range  

Kim, Min-Jun (Department of Aerospace and System Engineering and ReCAPT, Gyeongsang National University)
Kang, Dong-Woo (Department of Aerospace and System Engineering and ReCAPT, Gyeongsang National University)
Myong, Rho-Shin (Department of Aerospace and System Engineering and ReCAPT, Gyeongsang National University)
Kim, Won-Cheol (Agency for Defense Development)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.43, no.3, 2015 , pp. 204-212 More about this Journal
Abstract
The infrared lock-on range of target aircraft plays a critical role in determining the aircraft survivability. In this investigation, the effects of various UAV engine nozzle configurations on the aircraft lock-on range were theoretically analyzed. A virtual subsonic aircraft was proposed first, based on the mission requirement and the engine performance analysis, and convergent-type nozzles were then designed. After determining thermal flow field and nozzle surface temperature distribution with the CFD code, an additional analysis was conducted to predict the IR signature. Also, atmospheric transmissivity for various latitude and seasons was calculated, using the LOWTRAN code. Finally, the lock-on and lethal envelopes were calculated for different nozzle configurations, assuming the sensor threshold of the given IR guided missile. It was shown that the maximum 55.3% reduction in lock-on range is possible for deformed nozzles with the high aspect ratio.
Keywords
Infrared Signature; Atmospheric Transmissivity; Plume Flow Field; Lock-on Range;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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