摘要
为探究激波管内黏性流场流动规律及其试验区有效试验时间限度,基于CFD数值方法,利用FLUENT软件模拟了在激波管直径D(67.00 mm)、温度T 4,1(300 K)和流体初始速度(0 m/s)条件下,理想空气在激波管模型中湍流黏性流场的流动过程.根据模拟结果,得出了激波的运行规律和流场流动过程中压力和温度的变化规律,得到激波和高低压段间的接触面运行的位置-时间(x-t)变化情况,同时结合激波管侧壁与端壁上的监测点压力随时间变化的关系,对激波管有效试验时间进行评估.结果表明:湍流黏性流场计算出的激波速度与实验结果一致性良好;激波管试验区在反射激波与接触面相遇时刻开始被破坏,二次反射激波行至端壁的时间是有效试验时间限度的重要影响因素;该数值方法能够提供x-t关系图确定激波管5区试验时间限度.
To study the flow rule of viscous flow field in shock tube and the effective test time limit in the test area,FLUENT software was used to simulate the turbulent viscous flow field of ideal air in shock tube model under the conditions of shock tube diameter D(67.00 mm),temperature T 4(300 K)and initial fluid velocity(0 m/s).According to the simulation results,the running law of shock wave and the variation law of pressure and temperature in the process of flow field were obtained,and the position-time(x-t)variation of the interface between shock wave and high and low pressure section was obtained.Meanwhile,the effective test time of shock tube was evaluated according to the relationship between the pressure of monitoring points on the side wall and the end wall of shock tube.The results show that the calculated shock velocity in turbulent viscous flow field is in good agreement with the experimental results.The test area of shock tube begins to be destroyed when the reflected shock meets the contact surface,and the time when the secondary reflected shock reaches the end wall is an important factor affecting the effective test time limit.The numerical method can provide x-t diagram to determine the test time limit of shock tube in Zone 5.
作者
汪东旭
张尊华
梁俊杰
衡怡君
李格升
WANG Dongxu;ZHANG Zunhua;LIANG Junjie;HENG Yijun;LI Gesheng(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2021年第3期492-498,共7页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目(51779199、51809204)。
