Design optimization of hydraulic turbine draft tube based on CFD and DOE method

2017 6th International Conference on Power Science and Engineering

Nam, Mun Chol^1 ; Dechun, Ba^1 ; Xiangji, Yue^1 ; Mingri, Jin^1

School of Mechanical Engineering and Automation, Northeastern University, Shenyang

110819, China^1

关键词: Computation fluid dynamics;    Design optimization;    Geometrical designs;    Hydraulic turbine draft tube;    Main effect analysis;    Multi-disciplinary collaborative designs;    Performance improvements;    Response surface method;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/136/1/012019/pdf
DOI  :  10.1088/1755-1315/136/1/012019

来源: IOP

【 摘 要 】

In order to improve performance of the hydraulic turbine draft tube in its design process, the optimization for draft tube is performed based on multi-disciplinary collaborative design optimization platform by combining the computation fluid dynamic (CFD) and the design of experiment (DOE) in this paper. The geometrical design variables are considered as the median section in the draft tube and the cross section in its exit diffuser and objective function is to maximize the pressure recovery factor (Cp). Sample matrixes required for the shape optimization of the draft tube are generated by optimal Latin hypercube (OLH) method of the DOE technique and their performances are evaluated through computational fluid dynamic (CFD) numerical simulation. Subsequently the main effect analysis and the sensitivity analysis of the geometrical parameters of the draft tube are accomplished. Then, the design optimization of the geometrical design variables is determined using the response surface method. The optimization result of the draft tube shows a marked performance improvement over the original.