Optimal Structure Design and Performance Analysis of Multiphase Twin-screw Pump for Wet Gas Compression

Xuejing Zhang; Junhu Yang; Wenkai Bei; Wei Han; Canyang Chen; Le Yang

doi:10.5293/IJFMS.2021.14.2.208

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자료유형: 학술저널

저자정보: Xuejing Zhang (Lanzhou University of Technology) Junhu Yang (Lanzhou University of Technology) Wenkai Bei (Guilin University of Electronic Technology) Wei Han (Lanzhou University of Technology) Canyang Chen (Guilin University of Electronic Technology) Le Yang (Guilin University of Electronic Technology)

저널정보: 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.14 No.2

발행연도: 2021.6

수록면: 208 - 219 (12page)

DOI: 10.5293/IJFMS.2021.14.2.208

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The efficiency of multiphase twin-screw pump decreases sharply under wet gas conditions (GVF>95%) with severe vibration and thermal problems. Based on the design characteristics of twin-screw pump and screw compressor, a design method of multigradient variable pitch decompression screw pump is to address these problems in this paper. This method keeps the cross section profiles of screw pump unchanged，only changes the pitch of screw. According to the design concept of decompression of screw compressor, the screw rotor is divided into three regions from the inlet to the outlet. The pitch of screw and thread width in these regions are designed separately to increase the volumetric efficiency of the screw pump and reduce the vibration. The effective clearance leakage model of twin-screw pump is simplified and modified. Considering two-phase back flow and combining mechanical model with thermodynamic model, the flow capacity, volumetric efficiency, pressure, and temperature distribution of new and conventional screw pumps are predicted by non-isothermal compression model. The calculations show that the design scheme of multi-gradient variable-pitch decompression screw pump can solve the volumetric efficiency and vibration problems under wet gas conditions fundamentally and can significantly reduce the power consumption of screw pump. However, the problem of temperature rise of screw pump still exists. Cooling system for the screw pump should be designed to continuously cool the screw pump.

#Twin-screw pump #Wet gas compression #Multigradient variable pitch #Leakage model #Non-isothermal model

참고문헌 (7)

참고문헌 신청

Rabiger, K / 2008 / Theoretical and experimental analysis of a multiphase screw pump,handling gasliquid mixtures with very high gas volume fractions / Experimental Thermal and Fluid Science 32(8):1694~1701

김성 / 2018 / Design of Mixed-flow pump for Ns475 Based on Optimum Design Database / International Journal of Fluid Machinery and Systems 11(2):123~127

Long Yun / 2017 / The Effect of Different Inflows on the Unsteady Hydrodynamic Characteristics of a Mixed Flow Pump / International Journal of Fluid Machinery and Systems 10(2):138~145

Li Yi-bin / 2013 / The Numerical Simulation of Unsteady Flow in a Mixed flow Pump Guide Vane / International Journal of Fluid Machinery and Systems 6(4):200~205

Milan Sedlar / 2012 / CFD Analysis of Cavitation Phenomena in Mixed-Flow Pump / International Journal of Fluid Machinery and Systems 5(1):18~29

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