Detailed measurements of flow behavior have been taken in a rarefied ‘slip-flow’ regime hypersonic flow (Mach 12) over a sharp edged flat plate with a circular-cylindrical appendage designed to produced shock wave interactions. The flat plate is presented parallel to the wind tunnel freestream to generate a weak shock which impinges on the nearly-normal cylinder bow shock wave. Tests were condu...

Segment reinforcement corrosion can cause bearing-capacity degradation of shield tunnel, which is unsafe for the metro operation. Therefore, a three-dimensional computational model was proposed in this paper to study rate and rust expansion form segment by combined action soil loading, chloride ion stray current. The results show that arch waist steel middle larger than ends. appears be an ecce...

We describe a new technique for visualizing complex, nested features in multivariate volume data sets, such as those commonly found in medical imaging applications. Our work focuses on radiation therapy planning, where the problem is to locate ‘hot’ and ‘cold’ spots in a radiation dose field, inside a target tumour and surrounding organs. It is essential to visualize these different features si...

The active flow control technology by using plasma actuation to manipulate forebody vortices on a slender conical body is being studied based on the previous research. This work is motivated by the need to increase the experimental velocity in the wind tunnel via an effective streamlining created by the actuators. A pair of Single-Dielectric Barrier Discharge (SDBD) plasma actuators is installe...

The paper reports on wind tunnel experiments with an elastically suspended circular cylinder vibrating under the excitation of natural wind of high turbulence degree. The natural wind turbulence was simulated by superposing the low frequency part of the natural wind turbulence on the background high frequency turbulence of the wind tunnel flow. This was done by controlling the propeller rotatio...

geophysical techniques remain the only ways to remotely and non-destructively sense the earth’s near subsurface and as such have the most promising prospect for rapid and accurate detection of underground tunnels. today, electrical resistivity and seismic refraction geophysical methods have been greatly developed to identify structures and underground cavities. in this study, the ability of the...