CAJ | 학술논문

非均匀热气体由于内部空间点的温度、密度、组分及压力各不相同,其红外辐射特性的计算十分困难.为了计算非均匀热气体的红外辐射特性,首先从分析非均匀热气体特点和均匀热气体的谱带模型出发,以原子分子辐射理论为基础,结合谱线的碰撞展宽效应和多普勒展宽效应,利用单谱带模型Cunis-Godson(C-G)近似法对非均匀热气体谱带模型所用到的谱带模型参数进行了计算,提出一种计算非均匀热气体红外辐射特性的方法.最后,应用此方法计算了某单发动机喷气式飞机在非加力状态下尾焰3～5μm的红外辐射强度,计算结果与文献中给出的实际测量的尾焰红外辐射数据能较好地吻合,计算仿真结果验证了该方法的正确性.
비균균열기체유우내부공간점적온도、밀도、조분급압력각불상동,기홍외복사특성적계산십분곤난.위료계산비균균열기체적홍외복사특성,수선종분석비균균열기체특점화균균열기체적보대모형출발,이원자분자복사이론위기출,결합보선적팽당전관효응화다보륵전관효응,이용단보대모형Cunis-Godson(C-G)근사법대비균균열기체보대모형소용도적보대모형삼수진행료계산,제출일충계산비균균열기체홍외복사특성적방법.최후,응용차방법계산료모단발동궤분기식비궤재비가력상태하미염3～5μm적홍외복사강도,계산결과여문헌중급출적실제측량적미염홍외복사수거능교호지문합,계산방진결과험증료해방법적정학성.
The calculation of infrared radiation characteristics of non-uniform hot gas is very difficult because its temperature,density,component and pressure are non-uniform for different points of inner space.To calculate the infrared characteristics for non-uniform hot gas,characteristics of non-uniform hot gas and line group model of uniform hot gas were analyzed firstly and based on radiation theory of molecules and atoms,the parameters of line group model of non-uniform hot gas were calculated with C-G approximation for single spectrum model,combing the collided-broaden effects and the Doppler-broaden effects of spectrum.Based on the anterior analysis,a new calculation method of infrared radiation characteristics of non-uniform hot gas was presented.Finally,the 3-5 μm infrared radiation intensity released from a simple spout jet aircraft at normal state was computed by using the calculation method mentioned above.The calculation result is preferably accord with the meterage data included in the thesis.The calculation and simulation results validate the correctness of the proposed method.