Experimental and numerical investigation of AUT shock tube
Experimental and numerical investigation of AUT shock tube
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AUT激波管的实验与数值研究
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
M. Mottaghipour
中科院分区：
文献类型：
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作者：
A. Moradi;Fata Mohammadi Fard;M. Mani;M. Ranjbar;M. Mottaghipour
本研究以阿米尔卡比尔理工大学(AUT)的实验室激波管为研究对象，对运动正激波进行了实用化和CFD模拟研究。激波管几何结构简单，完全轴对称。加压气体是由储存在高压储罐中的活塞式压缩机产生的。有两个不同驱动气体压力和隔膜厚度的研究案例。驱动和驱动的气体都是空气。驱动气体部分对大气是开放的。横隔膜是由铝箔在一定压力下爆破制成的。有两个压力传感器，用来捕捉移动的法向冲击波时间间隔。因此，运动激波的速度是可以定义的。这两种情况都被考虑用于CFD模拟。对二维轴对称几何中的层流粘胶流态进行了瞬变形式的模拟。这些墙被认为是绝热的。模拟的时间步长为1e-05秒，迭代20次即可收敛。时间间隔很短，因此绝热壁面和层流的假设是可信的。采用MAP四边形网格进行区域描述，可以很好地捕捉到运动的正激波。对两种情况下的网格独立性进行了研究。然而，边界层和激波干扰以及壁面剪应力的影响并不是本文研究的目标，而是在壁面附近生成边界层网格，以供进一步研究。模拟和工程计算得到的冲击波通过时间间隔数据与实际数据具有良好的一致性。
In the present research, laboratory shock tube of the Amirkabir University of Technology (AUT) is determined for practical and CFD simulation investigation for moving normal shock wave. The shock tube is geometrically simple and totally axisymmetric. Pressurized gas is produced by a piston compressor stored in a high pressure tank. There are two study cases with the different driver gas pressure and diaphragm thickness. Both driver and driven gas is air. The driven gas part is open to atmosphere. Diaphragms are made of aluminium foil blasting in a certain pressure. There are two pressure sensors in order to capture the moving normal shock wave time intervals. Therefore the speed of moving shock wave is definable. Both cases are considered for CFD simulations. Simulations are done in transient form for laminar viscose flow regime in 2D, axisymmetric geometry. the walls considered to be adiabatic. The time step for simulation is 1e-05 sec which make the case convergent in 20 iterations. The time intervals are very short so the assumptions of adiabatic walls and laminar flow are trustworthy. Map quadrilateral grid employed for domain descritization, so the moving normal shock wave can be captured very well. grid independency study is done for both cases. However the effects of boundary layer and shockwave interaction and wall shear stress are not the goal of present study, but the boundary layer mesh is generated near wall for further studies. Time intervals data for passing shock wave from simulations and engineering calculations show good compatibility with practical data.