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Study on the Flow Characteristics and Structure of the Conoid Suction Side in the Centrifugal Pump

Author: LiSi
Tutor: MouJieGangï¼›ZhengShuiHua
School: Zhejiang University of Technology
Course: Fluid Machinery and Engineering
Keywords: Centrifugal pump The straight tapered absorbent room Flow characteristics The shape of the suction chamber Bulkhead
CLC: TH311
Type: Master's thesis
Year: 2010
Downloads: 52
Quote: 2
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Abstract


Centrifugal pump straight tapered suction chamber as the research object, using CFD numerical simulation method, simulation analysis on the state of internal flow of the suction chamber, the same time, the relationship that exists between the suction chamber shape, structure and centrifugal pump overall performance theory analysis and testing. The main research work includes: briefly CFD computational fluid dynamics and Pro / ENGINEER software development process, establish a \numerical methods. HCZ the series 50-160,65-160,150-250 three sizes corrosion-resistant chemical process pump three-dimensional hydraulic model built by Pro / E software; application software sub-block Grid Gambit, non-structured grid main, supplemented by structured grid unit, the hydraulic model meshing; Fluent numerical calculation equation solver strategies for Centrifugal Pump Flow field calculation. The internal flow characteristics of three different shapes straight tapered suction chamber a straight suction chamber (HCZ50-160), divergent suction chamber (HCZ65-160), the tapered suction chamber (HCZ150-250 ). By analyzing the three-dimensional component and the flow rate of the fluid velocity of the suction chamber, the radial position relationship between the axial position of the draw suction chamber internal flow state is accompanied by a small amount of radial swirl dimensional spiral flow, small flow conditions reflow phenomenon ( axial swirl). 3. Study of the shape of the suction chamber of the hydraulic performance of centrifugal pumps. Hydraulic model HCZ65-160 and HCZ150-250 based on its suction chamber to the the straight suction chamber CFD performance prediction: The results showed that applied to the same centrifugal pump, centrifugal pumps with straight suction chamber outperforms divergent suction chamber and tapered suction chamber. On this basis, the paper put forward innovative new combination of straight pipe with tapered pipe suction chamber model, applied to actual projects when: design point lift about 0.4m efficiency of about 1%. 4 built-in suction chamber partition on centrifugal pump performance. The partition can effectively weaken prewhirl, done a series of studies of the axial length of the bulkhead, radial length, quantity, and placement, the results show that: the radial length of a diameter of 1/4 is appropriate suction chamber imports, axial length b taken 3/4, of the axial length of the suction chamber placed separator 2 near the impeller inlet, and the centrifugal pump performance. 5 Complete Experimental study of the characteristics of centrifugal pumps outside. The reliable application of the test apparatus and the data acquisition system, combined with the corresponding adaptation of the test data processing method, 6 sets comparison program of the comparison test, the test results with predicted results consistent.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Pump > Vane pump > Centrifugal pump
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