Diaphragmless shock tube with multiple air-operated valves
Diaphragmless shock tube with multiple air-operated valves
复制标题
带多个气动阀的无隔膜冲击管
DOI：
10.1007/s00348-022-03473-y
复制
发表时间：
2022
影响因子：
2.4
通讯作者：
K. Nagata
中科院分区：
文献类型：
--
作者：
K. Inokuma;T. Maeda;T. Watanabe;K. Nagata
本文研究了一种由多个气动阀组成的驱动阀系统驱动的新型无隔膜激波管。该激波管能产生高重复性的激波，可满足激波统计研究的需要。驱动阀系统的主阀是通过使用“副阀”对主阀后面的次高压室的空气进行减压而开启的；这导致激波在激波管内形成。开发了三种不同的驱动阀（驱动阀具有“单个电磁副阀”、“单个气动副阀”和“三个气动副阀”）。对于三个驱动阀，分别用安装在激波管内壁和激波管开口前端的压力传感器测量激波的超压波形。此外，根据激波后的超压计算激波马赫数。带气动副阀的驱动阀激波马赫数最大。具有三个气动副阀的驱动阀，从激波管开口端喷出的激波的峰值超压波动的标准差最小。结果表明，通过多副阀实现主阀的快速开启时间增加了冲击波强度，提高了冲击波产生的重复性。图形抽象
In this study, a novel diaphragmless shock tube driven by a driver valve system consisting of multiple air-operated valves was developed. The novel shock tube can generate shock waves with high repeatability, which are required for statistical investigations of shock waves. The main valve of the driver valve system is opened by decompressing the air in the sub-high-pressure room behind the main valve using “sub-valves”; this results in a shock wave formation inside the shock tube. Three different driver valves (driver valve with “a single solenoid sub-valve,” “a single air-operated sub valve,” and “three air-operated sub-valves”) were developed. For each of the three driver valves, the overpressure waveforms of the shock waves were measured with pressure sensors installed on the inner wall of the shock tube and in front of the open end of the shock tube. Furthermore, the shock Mach number was calculated from the overpressure behind the shock waves. The shock Mach number was the largest for the driver valve with the air-operated sub-valve(s). The standard deviation of the peak overpressure fluctuations of the shock waves ejected from the open end of the shock tube was the smallest for the driver valve with the three air-operated sub valves. From the results, it was observed that the quick opening time of the main valve realized by the multiple sub-valves increased the shock wave strength and improved the repeatability of the shock wave generation.Graphic abstract