Advances in detonation driving techniques for a shock tube/tunnel

Abstract

Early works on the detonation driven shock tube are reviewed briefly. High initial pressure detonable mixture can be used in backward-detonation driver when the buffer tube is attached to the end of the driver for eliminating the excessive reflected peak pressure. Experimental data showed that an improvement on attenuation of the incident shock wave generated by the forward driver can be obtained, provided the diameter of the driver is larger than that of the driven section and an abrupt reduction of cross-section area is placed just beyond the diaphragm. Also, it is clearly verified by a numerical analysis. An additional backward-detonation driver is proposed to attach to the primary detonation driver and on condition that the ratios of initial pressure in the additional driver to that in the primary driver exceed the threshold value, the Taylor wave behind detonation wave in the primary detonation driver can be eliminated completely.

Fracture Evaluation in a Ceramic Spherical Dome Port Under Shock Impact

“…Figure 13 Figure 14 shows the comparison of numerical fracture pressure with experimental and analytical results that using Eqs. (10) and (12). Analytic incident pressure (P 2 ) is good agreement with experiment.…”

“…Keller et al [9][10][11] studied on the variation of internal behavior of shock-tube due to a screened layer or internal obstruction. Yu et al [12] carried out for attenuation of the incident shock wave generated by an abrupt reduction of cross-section area of the driven section which is placed just after the diaphragm. Stoffel [13] investigated a measurement technique for different material plates under shock wave loaded with two shock tubes.…”

Pressure and Heat Flux Calibration of the Long-test-duration Hypervelocity Detonation-driven Shock Tunnel

“…In the view of enthalpy and pressure requirements, the shock tunnel must incorporate a high performance driver. Among the existing driving techniques, the detonation drivers are capable of producing high enthalpy and high pressure test flows simultaneously beside an easy operation and low capital investment [4]. In recent years, the backward and forward modes have been studied at LHD and crucial techniques, such as spontaneous strong ignition and attenuation of the reflected waves have also been resolved successively [5].…”

Performance of a detonation driven shock tunnel

“…The detonation-driven method was first proposed to solve this problem by Bird in 1957 [3]. A detonation-driven shock tube was first designed and installed by Yu [4] [5]. The TH2 that operated in a backward-running mode was developed in Aachen, Germany [6].…”