东南大学学报（自然科学版）2025，Vol.55Issue(5)：1435-1443,9.DOI:10.3969/j.issn.1001-0505.2025.05.025
高压气体驱动扩张型激波管设计参数对超压特性影响的机制研究
Study on influence mechanism of design parameters of high-pressure-gas-driven expansion-type shock tubes on overpressure characteristics
摘要
Abstract
The influence law of design parameters of high-pressure-gas-driven expansion-type shock tubes on the overpressure characteristics is systematically studied by the computational fluid dynamics(CFD)method.The influence mechanism is clarified from the perspective of the formation,propagation,and interaction of rar-efaction waves and shock waves.The results demonstrate that increasing the overpressure or radius of the driver section can significantly enhance the initial incident shock wave intensity,thereby elevating the peak overpressure at the exit.When the driver overpressure increases from 2 to 15 MPa,the peak overpressure rises by approximately 1.8 times.The increase of the driver section radius from 100 to 400 mm results in about threefold increase in peak overpressure.Adjusting the driver section length and expansion angle fundamentally modulates the attenuation effect of reflected rarefaction waves on the shock waves.Although adopting low-molecular-weight driver gases(such as helium)instead of air can generate stronger initial incident shock waves,the reflected rarefaction waves subsequently overtake and weaken the shock front more rapidly.When the driver section length is less than 500 mm,the peak overpressure of the helium-driven shock tube is lower than that of the air-driven counterpart.关键词
激波管/激波/稀疏波/入射超压/正压持时Key words
shock tube/shock wave/rarefaction wave/incident overpressure/positive phase duration分类
数理科学引用本文复制引用
郝逸飞,林相龙,冯成栋..高压气体驱动扩张型激波管设计参数对超压特性影响的机制研究[J].东南大学学报（自然科学版）,2025,55(5):1435-1443,9.基金项目
国家自然科学基金资助项目(52378505). （52378505）
