Research on Design Method and Performance Analysis of the Ternary Guide Vane of Forced Circulation Pump Applied in Catalytic Cracking Unit
The forced circulation pump is the important equipment that provides water circulation power in the flue gas heat recovery system of catalytic cracking unit.The LUV pump with a guide vane and a hemispherical volute structure is a kind of the widely used forced circulation pumps.The structure of guide vane has a crucial impact on the performance of the pump.This article aiming on the problem that the flow angle and inlet blade angle of the binary guide vane at different blade height sections cannot be fully matched,develops a ternary guide vane design method that use the distribution of blade mean camber line angles and blade thickness at hub and shroud to construct the blade profile.By numerical methods studied the effect of the inlet and outlet blade installed angle at hub and shroud on the rated operating efficiency and internal flow characteristics.The results show that with one variate of the inlet and outlet blade angle at hub and shroud increases,the rated flow rate point efficiency increases and then decreases.The designed ternary guide vane scheme improves rated operating conditions efficiency by 0.9%than the binary guide vane scheme.The matching of the blade angle and the flow angle near hub plays a more important role in pump efficiency.The matching between the inlet flow angle and the blade installed angle on the 0.1 blade height section near hub has been improved in the ternary guide vane scheme.The vortex area on this section is reduced,and the energy dissipation inside the guide vane is reduced.
Forced Circulation PumpCentrifugal PumpNumerical SimulationDesign of Guide VaneInlet and Outlet Angles of Guide VaneFlow Analysis
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