Enhancement of Performance by Blade Optimization in Two-Stage Ring Blower

• Published in: Journal of thermal science Vol. 19; no. 5; pp. 383 - 389
• Main Authors: Jang, Choon-Man, Han, Gi-Young
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science Press 01.10.2010
• Subjects: Classical and Continuum Physics; Engineering Fluid Dynamics; Engineering Thermodynamics; Heat and Mass Transfer; Physics; Physics and Astronomy; Stokes方程; 优化性能; 压力上升; 响应面方法; 形状优化; 目标函数值; 高压鼓风机; Numerical simulation; Blower performance; Response surface method; Ring blower; Blade optimization
• ISSN: 1003-2169; 1993-033X
• DOI: 10.1007/s11630-010-0398-5

This paper describes the shape optimization of an impeller used for two-stage high pressure ring blower. Two shape variables, which are used to define an impeller shape, are introduced to increase the blower performance. The pressure of a blower is selected as an object function, and the blade optimization is performed by a response surface method. Three-dimensional Navier-Stokes equations are introduced to analyze the internal flow of the blower and to find the value of object function for the training data. Relatively good agreement between experi- mental measurements and numerical simulation is obtained in the present study. Throughout the shape optimiza- tion, it is found that a hub height is effective to increase pressure in the ring blower. The pressure rise for the op- timal two-stage ring blower is successfully increased up to 1.86% compared with that of reference at the design flow rate. Local recirculation flow having low velocity is formed in both sides of the impeller outlet by different flow direction of the inlet and outlet of the impeller. Detailed flow field inside the ring blower is also analyzed and discussed.