Fast multi-objective optimization design of gas turbine L-inlet duct

Author:

Xin Xiaopeng12ORCID,Min Yilong3,Pan Dingyi3ORCID,Liu Zhenyu1ORCID,Tan Jianrong1

Affiliation:

1. State Key Laboratory of CAD&CG, Zhejiang University, Hangzhou, China

2. New Energy Research Institute, Hangzhou Turbine New Energy Co., Ltd, Hangzhou, China

3. State key Laboratory of Fluid Power and Mechatronic Systems and Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China

Abstract

With ever-increasing demand for high efficiency and high stability gas turbine under the goal of carbon neutrality, the design of L-inlet duct has set stricter demands for low pressure loss and low flow distortion. No general optimization guidelines on both pressure loss and distortion for L-inlet duct were found in open literature. Four geometry parameters including inlet width, inlet length, contraction geometry angle and truncated cone geometry angle are explored for their effects on the trends of pressure loss and flow distortion. Optimization geometry parameters of the L-inlet duct are analysed, and the flow characteristics are thoroughly examined. The flow field characteristic of ΔPt, DC60, SC60 from surrogate model are validated by CFD, the relative errors are 0.37%, −3.92% and 1.75%, respectively. At the design point EF = 35 comparing with original scheme of the L-inlet duct, ΔPt decreases 21.14%, DC60 decreases 45.37%, and SC60 decreases 38.7%. For all off design conditions, the optimization results are better than original scheme. It is estimated that gas turbines can achieve a 0.144% reduction in power loss and a 0.333% improvement in surge margin.

Funder

Shanghai Nuclear Engineering Research & Design Institute CO., LTD

National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Mechanical Engineering,Energy Engineering and Power Technology

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