【摘要】：為定量分析強(qiáng)爆炸光輻射輻照特征及其與爆炸當(dāng)量的關(guān)系,建立了用于描述光輻射輸運(yùn)過(guò)程的輻射流體力學(xué)模型。在算子分裂方法運(yùn)用的基礎(chǔ)上,采用溫度梯度作為指示子進(jìn)行并行區(qū)域的動(dòng)態(tài)劃分,從而實(shí)現(xiàn)較高效率的并行求解。在此基礎(chǔ)上數(shù)值計(jì)算了千噸~兆噸當(dāng)量下強(qiáng)爆炸光輻射的發(fā)展過(guò)程,分析表明:光輻射強(qiáng)度隨時(shí)間呈現(xiàn)"雙脈沖"變化,強(qiáng)度極小和強(qiáng)度第2極大時(shí)刻與當(dāng)量的某次方成正比。光輻射總功率變化歷程與光輻射強(qiáng)度變化歷程相似,但受輻射源半徑隨當(dāng)量變化的影響,其極值時(shí)刻會(huì)出現(xiàn)差異。
[Abstract]:In order to quantitatively analyze the radiation characteristics of intense explosion radiation and its relationship with the explosion equivalent, a radiative hydrodynamic model was established to describe the transport process of light radiation. Based on the application of the operator splitting method, the temperature gradient is used as the indicator for the dynamic partition of the parallel region, so that the efficient parallel solution can be realized. On the basis of this, the development process of strong explosion light radiation at kiloton-megalton equivalent is numerically calculated. The analysis shows that the intensity of light radiation varies with time, and the intensity is minimal and the second maximum moment of intensity is proportional to the power of equivalent. The variation history of the total power of light radiation is similar to that of the intensity of light radiation, but the extreme time will be different due to the influence of the radius of the radiation source with the change of the equivalent.
【作者單位】： 北京理工大學(xué)材料學(xué)院;西北核技術(shù)研究所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(91330205)
【分類(lèi)號(hào)】：O38
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本文編號(hào)：2369029