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This paper presents a series of soot track patterns formed by gaseous detonation in following 3 cases: (1) diffraction on wedges with different wedge angle, (2) propagation through a slot, (3) diffraction over a T-shape bifurcated duct. These patterns describe the Mach reflection process of a detonation and can be used to analyze the relation between trajectory angle of the triple point and wedge...
The lateral growth of GeSn strips on Si(111) has been successfully achieved by Sn self-catalyzed MBE method. The effect of Sn catalysts on morphology and the quality of the materials were studied. The high quality GeSn on Si will contribute to development of Si-based optoelectronics.
In this paper, the transition of a detonation from deflagration was investigated numerically while a detonation wave propagates in a tube with a sudden change in cross section, referred to as the expansion cavity. The dispersion-controlled scheme was adopted to solve Euler equations of axis-symmetric flows implemented with detailed chemical reaction kinetics of hydrogen-oxygen (or hydrogen-air) mixture...
In this paper, detonation propagation in a forward detonation driver is simulated by solving axis-symmetric Euler equations to examine its performances. The Dispersion Controlled Dissipation (DCD) scheme is adopted in the simulations and the two-step chemical reaction model modified by M. Sichel et al. are accepted for a H2 − O2 mixture. The flowfield near the cavity ring is...
Sliding Mode Controller (SMC) can achieve good tracking performance and robustness to the disturbances, but SMC has worse stability and reliability than PID controller. As a most widely used controller, PID controller has many obvious advantages, but it has poorer tracking performance than SMC. In this paper, a hybrid control method of sliding mode and PID controllers is proposed to fully combine...
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