Investigation into the Influence of Division Pier on the Internal Flow and Pulsation in the Outlet Conduit of an Axial-Flow Pump

The outlet conduit is an important construction connecting the of pump guide vane and pool; in order to study hydraulic performance straight axial-flow device, this paper adopts method numerical simulation analyzes influence division pier on pressure velocity distribution inside near wall based three design schemes. Four pulsation measuring points were arranged conduit, low-frequency characteristic information with without was extracted by wavelet packet reconstruction. results show that addition a has effect loss, near-wall conduit. A small high-pressure zone formed at starting position pier, large high-speed left side pier. length no significant flow wall. Under different working conditions, each monitoring point maximum energy sub-band (0~31.25 Hz). With increase rate, total decreases gradually. condition, difference proportion horizontal small, two top bottom channel relatively large. smaller than There are differences main frequency power spectrum corresponding reasonable setting conducive reducing beneficial safe stable operation device.