study on the back-wall shape of campaniform inlet duct of pumping station
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Abstract:
Based on the three dimensional incompressible fluid Reynolds averaged navier-stokes equation and RNG k - epsilon turbulence model, the numerical simulation of three-dimensional turbulent flow of a rectangular, semicircular and bell-shaped inlet pump with "ω" suction chamber back wall shape was carried out.This paper also has analyzed the influence of wall shape on hydraulic characteristics of pump device after bell inlet passage. Under the same flow rate,streamline distribution of the “ω” shape suction chamber passage was the most average; the vortex of the “ω” shape suction chamber passage was the smallest;Hydraulic loss in the “ω” shape suction chamber passage was 1cm smaller than that of the rectangular shape suction chamber passage.Velocity uniformity of the export section reached 93%, higher than the rectangle and the semicircle suction chamber inlet port to 2%;Export section speed weighted average Angle is 83.5 °; Pump running high efficient area flow range became wider . This research had significance for improving the design of suction chamber of the Bell type inlet.
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