Infrared signature of NEPE, HTPB rocket plume under varying flight conditions and motor size
| Autor: | Joon Sang Lee, Sang-Hoon Kim, Sangmin Kim, Soonho Song, Mintaek Kim |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.product_category 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Plume Computational physics 010309 optics symbols.namesake Altitude Mach number Rocket Infrared signature 0103 physical sciences Radiance symbols 0210 nano-technology business Radiant intensity Physics::Atmospheric and Oceanic Physics Intensity (heat transfer) |
| Zdroj: | Infrared Physics & Technology. 112:103590 |
| ISSN: | 1350-4495 |
| DOI: | 10.1016/j.infrared.2020.103590 |
| Popis: | In this study, radiation signatures of rocket plumes based on HTPB and NEPE propellants are simulated under varying altitudes, flight Mach numbers, and motor size . The flow field of plume is calculated by computational fluid dynamics, and the infrared signature is predicted using a Ludwig model. To verify the numerical method, experiments were conducted using small rocket motors and radiometric FTIR. The acceptable agreement between numerical calculation and the experiment was obtained in 2 – 5 μm wavelength region. The total radiance decreases with increasing altitude whether afterburning exists or not. A decreasing rate in the radiance of the plume with strong afterburning is larger than that of the plume with weak afterburning. The change in total intensity according to altitude depends on the afterburning and is directly affected by the radiating area. As the flight Mach number increases, total radiance, total intensity, and radiating area decrease. The motor size makes radiation intensity increase exponentially; exponent value is from 2.6 to 2.7. As the motor size increases, the effect of altitude increases, while the effect of flight Mach number decreases. |
| Databáze: | OpenAIRE |
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