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Study of Aero-thermal Effects with Heat Radiation in Optical Side Window
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Chun-Chi Huang, Da-Wei Su, Yin-Chia Tasi, L. |
| Copyright Year | 2012 |
| Abstract | In hypersonic environments, the aerothermal effect makes it difficult for the optical side windows of ptical guided missiles to withstand high heat. This produces crac king or breaking, resulting in an inability to function. This study u sed computational fluid mechanics to investigate the external cooling jet conditions of optical side windows. The turbulent models kε and k-ω were simulated. To be in better accord with actual aerot hermal environments, a thermal radiation model was added t o examine suitable amounts of external coolants and the optic al window problems of aero-thermodynamics. The simulation res ults indicate that when there are no external cooling jets, because ai rflow on the optical window and the tail groove produce vortices, the te mp ratures in these two locations reach a peak of approximately 1600 K. When the external cooling jets worked at 0.15 kg/s, the surf ace temperature of the optical windows dropped to approximately 280 K. When adding thermal radiation conditions, because heat flux dis sipation was faster, the surface temperature of the optical windows fell from 280 K to approximately 260 K. The difference in influence of the different turbulence models kε and k-ω on optical window surface temperature was not significant. Keywords—aero-optical side window, aerothermal effect, cooli ng, hypersonic flow |
| Starting Page | 943 |
| Ending Page | 947 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| Volume Number | 6 |
| Alternate Webpage(s) | http://waset.org/publications/9027/study-of-aero-thermal-effects-with-heat-radiation-in-optical-side-window |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
