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Zhang J.-J.,Institute of Particle and Two Phase Flow Measurement | Wang Z.-Y.,Institute of Turbomachinery and Fluid Engineering | Cai X.-S.,Institute of Particle and Two Phase Flow Measurement | Dai R.,Institute of Turbomachinery and Fluid Engineering | Niu F.-X.,Institute of Particle and Two Phase Flow Measurement
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2011

A new integrated probe is developed on the basis of existing probes. It can be used for measuring simultaneously all parameters of wet steam flow in LP steam turbine. The new structure of the probe is optimized with CFD. Both results with numerical simulation and calibration in a open wind tunnel demonstrate that the symmetrical structure of probes is superior in non-symmetrical structure in aerodynamic performance. Source


Zhang J.-J.,Institute of Particle and Two Phase Flow Measurement | Fan X.-L.,Institute of Particle and Two Phase Flow Measurement | Cai X.-S.,Institute of Particle and Two Phase Flow Measurement
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2012

This paper proposes a method on measurements for the velocity vector field of particles in the gas-solid two phase flow using single frame and single exposure imaging. Motion blur image with single frame of particles in the flow can be acquired by controlling exposure time of the camera. The velocity of particles is obtained using autocorrelation to reconstruct two-dimensional velocity field after image segmentation using watershed algorithm and particle extraction. The fact that experimental results of the velocity for glass sedimentation in the air measured by this method are consistent with the theoretical values and the velocity fields are consistent with the particle trajectories shows that this method can be used for velocity field measurements in the two phase flow. Study indicates that laser sheet source is better than backlight to obtain the more accurate velocity. Source

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