真空与低温
真空與低溫
진공여저온
VACUUM AND CRYOGENICS
2015年
2期
92-95
,共4页
热防护%气动加热%红外窗口%数值模拟
熱防護%氣動加熱%紅外窗口%數值模擬
열방호%기동가열%홍외창구%수치모의
thermal protection%aerodynamic heating%Optical Windows%Numerical Simulation
处于气动加热环境下的红外窗口，由于强热流影响会导致窗口材料外形和光学性质发生变化，严重影响光学窗口的正常工作。以红外成像在高超声速飞行器上的应用为需求背景，针对气动加热条件下红外窗口的传热特性，建立红外窗口三维非稳态传热计算模型，利用FLUENT软件对红外窗口采用主动冷却与被动热防护效果进行了数值模拟，验证了主动冷却技术在红外窗口温度控制的可行性，并对所需的冷量进行了计算，给出了典型状态下的计算结果。
處于氣動加熱環境下的紅外窗口，由于彊熱流影響會導緻窗口材料外形和光學性質髮生變化，嚴重影響光學窗口的正常工作。以紅外成像在高超聲速飛行器上的應用為需求揹景，針對氣動加熱條件下紅外窗口的傳熱特性，建立紅外窗口三維非穩態傳熱計算模型，利用FLUENT軟件對紅外窗口採用主動冷卻與被動熱防護效果進行瞭數值模擬，驗證瞭主動冷卻技術在紅外窗口溫度控製的可行性，併對所需的冷量進行瞭計算，給齣瞭典型狀態下的計算結果。
처우기동가열배경하적홍외창구，유우강열류영향회도치창구재료외형화광학성질발생변화，엄중영향광학창구적정상공작。이홍외성상재고초성속비행기상적응용위수구배경，침대기동가열조건하홍외창구적전열특성，건립홍외창구삼유비은태전열계산모형，이용FLUENT연건대홍외창구채용주동냉각여피동열방호효과진행료수치모의，험증료주동냉각기술재홍외창구온도공제적가행성，병대소수적랭량진행료계산，급출료전형상태하적계산결과。
In the aero-dynamic environment,optical windows shape and optical property will be changed because of high heat flow,then the employment of the transmission of optical windows will be effected. According to the requirement of IR imaging technique applied in hypersonic aircraft,the heat transfer characteristic in optical windows under aerody-namic heating were studied and the three dimensions unsteady state heat conduction equations in unstructured were estab-lished. The effect of initiative cooling and passive heat insulation thermal protection technology were calculated with the engineering prediction software-Fluent. The feasibility of initiative cooling technology on temperature control of optical windows were validated. The capacity were caculate and some computer simulation results at classical state were presented.
