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- W2040559479 abstract "韓國航空宇宙學會誌 , ** , *** Agency for Defense Development**** 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 a nd 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." @default.
- W2040559479 created "2016-06-24" @default.
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- W2040559479 date "2015-03-01" @default.
- W2040559479 modified "2023-09-25" @default.
- W2040559479 title "Investigation of the Effects of UAV Nozzle Configurations on Aircraft Lock-on Range" @default.
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- W2040559479 doi "https://doi.org/10.5139/jksas.2015.43.3.204" @default.
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