摘要
利用商用软件Fluent对所建非对称平面扩压器模型进行了数值模拟,结果与Buice的试验数据能较好地吻合,验证了模拟结果的可靠性.利用三次贝塞尔曲线对扩压段倾斜壁面型线进行参数优化,得出影响扩压器性能的主要因素为中间两控制点中x1、x2以及y2这3个坐标的取值.通过三次正交试验设计,发现影响因素的重要性依次为x1、x2和y2,并得到了一条气动性能较佳的型线.通过比较优化后型线与初始型线发现,扩压段总压损失系数下降了10.69%,而静压恢复系数提高了1.96%.
Using the software Fluent to simulate the model of asymmetric plane diffuser, the results can basically tally with Buice＇s experimental data, that justifies the reliability of the simulated results. The declining boundary profile of diffuser was parameterized according to the cubic Bezier curve, and the analytical result shows that the main factors that affect the performance of the diffuser are the coordinate values of controlling points： x1 , x2 and y2. It＇s found that the factors can be arranged as x1, x2 and y2 in turn by their effects through three-times orthogonal test, during which a curve with better aerodynamic performance is obtained. Compared to the original profile line, the total pressure loss coefficient is reduced by 10.69%, while the static pressure recover coefficient is raised by 1.96%.
出处
《动力工程学报》
CAS
CSCD
北大核心
2010年第5期352-356,共5页
Journal of Chinese Society of Power Engineering
基金
国家科技支撑计划资助项目(2008BAF34B15-2)
上海市重点学科建设资助项目(J50501)
关键词
非对称平面扩压器
贝塞尔曲线
正交试验
流动优化
数值模拟
asymmetric plane diffuser Bezier curve orthogonal test flow optimization numerical simulation
