Sammendrag
This paper presents the behavior of pressure in an air–water shock tube. In this work,
high-pressure air (at 100 bar) interacts with water (at 1 bar) through an orifice in
a 100mm constant diameter tube. The experiments are repeated with three different orifice
plate diameters of 4, 8, and 15 mm. The variation of pressure during the transient
stage is recorded in these experiments and it is found that with increasing orifice diameter,
the amplitude of the pressure increases linearly with time when all other conditions
are unchanged. The same phenomenon is simulated using the LS-DYNA software using an
arbitrary Lagrangian Eulerian (ALE) method to solve the problem numerically. Simulations
are made with a range of orifice diameters. The experimental results confirm the
validity of the simulations algorithm. The simulations also demonstrated that the pressure
behaves linearly with orifice diameter only when orifice diameter is less than 15% of the
tube diameter. [DOI: 10.1115/1.4031591]
Vis fullstendig beskrivelse