Research on Flow Divider of High Pressure Water-jet Target Material Detection Device

摘要

In order to identify target material and physical dimension quickly and effectively by utilizing high pressure water-jet, the equal eigenvalues of reflected sound signal is required when high pressure water-jet impulse the same target through array nozzles. It is necessary to research the reasonable structure for flow divider to ensure that pressure and flow of every nozzle are identical. According to the device structure size, basic structure of flow divider and pipeline connection request, structure parameters of flow divider were acquired and introduced in this paper. The required initial parameters were calculated on demand, and the inside fluid state of flow divider was also judged. The governing equations are developed by combining incompressible viscous fluid continuity equation with N-S equation and standard k-ε turbulence model. Structure parameters were optimized by combining fluent with the orthogonal experiment. Through the comparison of pressure and flow data acquired in the analysis of the inside flow field of the flow divider, maximum relative pressure deviation of nine channels that based on the optimal size is 0.0243% and maximum relative deviation of the mass flow is 0.0000187%. The requirements of pressure and flow uniformity for identifying target material by using high pressure water-jet and multiple nozzles can be met perfectively.