Content area

Full text

Hui Li [1; 2] and Dian-Gui Huang [1; 2]

Academic Editor: Ryoichi Samuel Amano

1, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China, usst.edu.cn

2, Shanghai Key Laboratory of Power Energy in Multiphase Flow and Heat Transfer, Shanghai 200093, China

Received Apr 8, 2017; Revised Jun 28, 2017; Accepted Aug 7, 2017

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

1. Introduction

With the continuous reduction of fossil energy and the enhancement of people’s environment awareness, there has been increasing attention to the high efficiency utilization of energy, where the turbine is energy conversion component; if the turbine is improved effectively, it can help to improve the efficiency utilization of energy.

Centrifugal turbine is a new type of turbine engine which has many advantages. In the centrifugal turbine, the gas flows outward the center and the channel area of the flow path increase naturally as the fluid volume flow increases, during the expansion process. That meets the principle of aerodynamic and geometric matching. In addition, centrifugal turbine can be used to achieve multistage design [1] more easily than centripetal turbine. Thus it can avoid the limitation of supersonic flow. This is more useful for design conditions, especially for off-design performance conditions.

For turbine as the key component, many scholars in this area have done some relevant researches, but there is not much research on centrifugal turbine. Domestically, mainly Jing and Peng had studied the pneumatic analysis of a rocket centrifugal turbine prototype starter and designed the modification turbine [2]; Yin-Ge et al. [3] and Xin et al. [4, 5] had researched the single-stage centrifugal turbine design and its off-design performance. Abroad, the preliminary hydrodynamic design of a small centrifugal turbine for the ORC was studied by Casati and others of the Delft University of Technology. They introduced the optimization based on the intermediate streamline method for evaluating turbine design and performance [6–10].

In this paper, one-dimensional design method of centrifugal steam turbine is proposed by drawing on the conventional turbine [11]. And numerical simulation and optimization of multistage centrifugal turbine were studied by referring to...

  

  

Show less