Collaborative Design of the Wrap Angles Between Impeller and Space Diffuser of Diagonal-Flow Pump
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RESEARCH ARTICLE-PETROLEUM ENGINEERING
Collaborative Design of the Wrap Angles Between Impeller and Space Diffuser of Diagonal‑Flow Pump Yingju Pei1 · Qingyou Liu2,3 · Guorong Wang2 · Wenwu Song4 Received: 19 May 2019 / Accepted: 26 December 2019 © King Fahd University of Petroleum & Minerals 2020
Abstract The wrap angle is one of the key parameters in design of impeller and space diffuser. At present, it is mainly designed based on theoretical estimation and experience. However, there are few studies on collaborative design. In this paper, the process model of collaborative design was put forward, then 25 kinds of wrap angle matching schemes between impeller and space diffuser were determined by orthogonal experimental method, and it was completed to study basic change law of the external characteristics and flow field under different matching schemes. It was shown that impeller wrap angle had more obvious influence on the hydraulic characteristics than space diffuser wrap angle within a certain wrap angle range. Therefore, the optimal impeller wrap angle should be determined in the collaborative design at first. By the multidimensional evaluation criteria, it was carried out such as the selection of the space diffuser wrap angle. It can reduce a lot of work to easily find a better balance about multi-influence of the multi-component parameters, and get an optimal performance when the diagonalflow pump is used in oil and gas development. Keywords Diagonal-flow pump · Oil and gas · Collaborative design · Impeller · Space diffuser · Wrap angle
1 Introduction The diagonal-flow pump is widely used in petrochemical industry, onshore petroleum engineering, offshore oil and gas development, and other fields. It is a kind of pump whose characteristic and structure are between the axial-flow pump and the centrifugal pump, known as the guide vane mixed-flow pump. It has many advantages such as small outer diameter, convenient maintenance and disassembly, strong cavitation resistance, and high efficiency.
* Qingyou Liu [email protected] * Guorong Wang [email protected] 1
Petroleum Engineering School, Southwest Petroleum University, Chengdu 610000, China
2
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610000, China
3
Chengdu University of Technology, Chengdu 610000, China
4
School of Energy and Power Engineering, Xihua University, Chengdu 610000, China
Impeller and space diffuser are main parts of diagonalflow pump, and the optimum design plays a vital role in increasing the hydraulic characteristics when the diagonalflow pump is used in oilfield engineering [1–3]. It should be studied in the collaborative design of key parameters by multidimensional analysis, not just confined to analyze single factor [4, 5]. Heo et al. [6] showed that the efficiency of the mixed-flow pump at the prescribed specific speed was improved considerably by the design optimization. Tan et al. [7] analyzed the influence of blade wrap angle on centrifugal pump per
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