In conventional shock tubes with a diaphragm, many effects related to the burst of the diaphragm can influence shock formation, thus preventing an ideal pressure step change, as predicted by the shock tube measurement model being generated. This paper presents a newly developed diaphragmless shock tube with a quick-acting pneumatic valve, which demonstrates several advantages over conventional shock tubes with a diaphragm. The tests of the developed diaphragmless shock tube were performed using nitrogen at the atmospheric initial driven pressure, and at initial driver gauge pressures from 1 MPa to 7 MPa. The results show that the construction of the developed shock tube effectively reduces the generation of secondary shock waves and mechanical vibrations, which are often generated during the operation of shock tubes, thereby increasing the uncertainty of the shock tube calibration method. The uncertainty analysis shows that the developed diphragmless shock tube can act as a prim...

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新开发的用于压力表动态校准的无隔膜减震管的特性

在具有隔膜的传统减震管中，与隔膜破裂有关的许多影响都会影响减震的形成，从而阻止理想的压力阶跃变化，这是由生成的减震管测量模型所预测的。本文介绍了一种新开发的带有快速作用气动阀的无隔膜减震管，与传统的带有隔膜的减震管相比，它展示了几个优点。在大气初始驱动压力和驾驶员初始表压为1 MPa至7 MPa的条件下，使用氮气进行了开发的无隔膜减震管的测试。结果表明，开发的减震管的结构有效地减少了在减震管运行过程中经常产生的二次冲击波和机械振动的产生，从而增加了冲击管校准方法的不确定性。不确定性分析表明，开发的无隔膜减震管可以作为主要的...