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Imploding water wave: A poppy blossom Phys. Fluids 24, 091113 (2012) Non-contact near-field underwater explosion induced shock-wave loading of submerged rigid structures: Nonlinear compressibility effects in fluid structure interaction J. Appl. Phys. 112, 024911 (2012) Dynamic mode decomposition analysis of detonation waves Phys. Fluids 24, 066101 (2012) Suppression of the vorticity production by the unsteady rarefaction waves in the blast-bubble interactions Phys. Fluids 24, 054105 (2012) Numerical study of detonation transmission in mixtures containing chemical inhibitors Phys. Fluids 24, 056102 (2012) Additional information on J. Appl. Phys.Characteristics of the internal structure of the laser supported detonation (LSD) waves, such as the electron density n e and the electron temperature T e profiles behind the shock wave were measured using a two-wavelength Mach-Zehnder interferometer along with emission spectroscopy. A TEA CO 2 laser with energy of 10 J/pulse produced explosive laser heating in atmospheric air. Results show that the peak values of n e and T e were, respectively, about 2 Â 10 24 m À3 and 30 000 K, during the LSD regime. The temporal variation of the laser absorption coefficient profile estimated from the measured properties reveals that the laser energy was absorbed perfectly in a thin layer behind the shock wave during the LSD regime, as predicted by Raizer's LSD model. However, the absorption layer was much thinner than a plasma layer, the situation of which was not considered in Raizer's model. The measured n e at the shock front was not zero while the LSD was supported, which implies that the precursor electrons exist ahead of the shock wave.

HAN‐based green liquid propellant, SHP163 is tested in space at the Rapid Innovative Payload Demonstration Satellite (RAPIS) project. The first RAPIS satellite, RAPIS‐1, was successfully launched with six other small satellites on January 18th, 2019 by the Epsilon‐4 launcher. In addition, the thruster of the 1 N Green Propellant Reaction Control System (GPRCS) fueled with SHP163 was installed on RAPIS‐1, which has started its operation in space. The first injection was performed on February 18th, 2019 for 20 s, and the combustion was recognized with an increase in temperature of the catalyst bed and the increment of semi‐major axis of the satellite. The combustion efficiency evaluated using the semi‐major axis data was more than 80 %. The test in space will continue till the end of January 2020, setting the full success at 3,000 s of accumulated operation time and 10,000 times pulse mode burn.

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