模拟舱室内部气云爆炸载荷的不同精度WENO格式比较  

Comparisons of Different Precision WENO Schemes for Simulating Blast Load of Gas Cloud Explosion inside a Cabin

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,Wuhan 430063,China;Departments of Naval Architecture,Ocean and Structural Engineering,School of Transportation,Wuhan University of echnology,Wuhan 430063,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,湖北武汉430063 [2]武汉理工大学交通学院船舶海洋与结构工程系,湖北武汉430063

出　　处：《高压物理学报》2018年第4期37-46,共10页Chinese Journal of High Pressure Physics

基　　金：装备预研教育部联合基金(青年人才)(6141A020331);国家自然科学基金(51409202);中央高校基本科研业务费(2016-YB-016)

摘　　要：为了研究加权本质无振荡(WENO)格式精度对舱室内部气云爆炸载荷的影响规律,基于FORTRAN平台,采用三、五、七、九阶WENO格式,开发了高精度舱室内部气云爆炸三维数值计算程序。选用Sod激波管、激波与熵波相互作用两个经典算例验证了程序编写的可靠性,并初步考察了不同精度WENO格式的计算性能。采用已验证的程序开展了封闭舱室和泄压舱室内部球体气云爆炸的数值模拟,并探讨了WENO格式精度对爆炸载荷的影响规律。研究表明:舱室内部气云爆炸载荷主要包含瞬态冲击波和持续时间较长的准静态超压;WENO格式精度对冲击波载荷影响较大,高阶格式给出更陡峭的峰值,而对形成的准静态超压影响较小。In the present work,we developed a high-resolution 3D code based on the FORTRAN platform to investigate the influence of accuracy of WENO schemes on the blast load generated by gas cloud explosion inside a cabin.The 3th,5th,7th and 9th WENO finite difference schemes were implemented in the code to capture the shock waves.Several one dimensional Riemann problems such as Sod shock tube and shock-entropy wave interaction were simulated to investigate the computing performance of the schemes preliminarily and validate the developed code.Then,the validated code was used to conduct the simulation of the gas cloud explosion inside a closed cabin and a venting cabin and the influence of the accuracy of WENO schemes on the blast load was discussed as well.The researches indicate that the blast load generated by gas cloud explosion inside the cabin mainly contains multiple peaks shock waves and long duration quasi-static overpressure.The accuracy of WENO schemes has considerable influence on the blast waves and higher order scheme gives sharper pressure peaks,whereas it has much less influence on the quasi-static overpressure.

关 键 词：WENO格式 高精度 低耗散 舱室内部气云 爆炸载荷 

分 类 号：O381[理学—流体力学]