基于伯努利方程舱室内爆炸准静态泄压过程研究  

The research on quasi-static relief process of explosion in a cabin based on Bernoulli equation

作　　者：徐维铮[1,2] 吴卫国[1,2] Xu Weizheng;Wu Weiguo(Key Laboratory of High Performance Ship Technology of Ministry of Education,Wuhan University of Technology,430063,Wuhan,China;Department of Naval Architecture,Ocean and Structural Engineering,School of Transportation,Wuhan University of Technology,430063,Wuhan,China)

机构地区：[1]武汉理工大学高性能舰船技术教育部重点实验室,武汉430063 [2]武汉理工大学交通学院船舶、海洋与结构工程系,武汉430063

出　　处：《应用力学学报》2019年第6期1504-1508,I0016,共6页Chinese Journal of Applied Mechanics

基　　金：国防基础研究项目(B1420133057);国家自然科学基金(51409202;51509196);中央高校基本科研业务费(2016-YB-016)

摘　　要：为了研究舱室内炸药爆炸泄压过程参数变化规律,基于伯努利方程推导给出了一种计算泄压过程中准静态压力及速度时间历程的简化计算公式。采用自主开发的程序开展了不同泄压口大小、不同质量炸药下舱室内爆炸泄压数值计算,通过理论与数值计算结果的对比分析了公式中等熵指数的取值及影响因素。研究结果表明,泄压口大小对等熵指数影响很小,而炸药质量对等熵指数影响较大,随着炸药质量增大,等熵指数不断减小并趋于1.0。In order to study the change of parameters during relief process of explosion in a cabin, a simplified calculation formula is derived to calculate the quasi-static pressure and gas flowing out velocity time history based on the Bernoulli equation derivation. An in-house code is applied to conduct numerical calculations for different venting holes and different explosive masses. The values and influencing factors of undetermined isentropic index in the proposed formula are preliminarily analyzed by comparing the theoretical and numerical results. It is indicated that the effect of size of venting hole on isentropic index is small, while the effect of explosive mass on isentropic index is large. As the explosive mass increases, the isentropic index decreases and tends to be 1.0. The research in this paper can provide certain reference and basis for the assessment of explosion damage in a cabin.

关 键 词：舱室内爆炸泄压 WENO格式 数值计算 伯努利方程 准静态压力 气体泄出速度 

分 类 号：O354.5[理学—流体力学]