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教授 硕士生导师
招生学科专业:
力学 -- 【招收博士、硕士研究生】 -- 航空学院
航空宇航科学与技术 -- 【招收硕士研究生】 -- 航空学院
机械 -- 【招收博士、硕士研究生】 -- 航空学院
毕业院校:南京航空航天大学
学历:南京航空航天大学
学位:工学博士学位
所在单位:航空学院
办公地点:C12-317
联系方式:13915942440
电子邮箱:
A Double-Passage Shape Correction Method for Predictions of Unsteady Flow and Aeroelasticity in Turbomachinery
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所属单位:航空宇航学院
发表刊物:ADVANCES IN APPLIED MATHEMATICS AND MECHANICS
关键字:Double passage shape correction Fourier transformation unsteady flow aeroelasticity vibrating blades turbomachinery
摘要:In this paper, a double-passage shape correction (DPSC) method is presented for simulation of unsteady flows around vibrating blades and aeroelastic prediction. Based on the idea of phase-lagged boundary conditions, the shape correction method was proposed aimed at efficiently dealing with unsteady flow problems in turbomachinery. However, the original single-passage shape correction (SPSC) may show the disadvantage of slow convergence of unsteady solutions and even produce nonphysical oscillation. The reason is found to be related with the disturbances on the circumferential boundaries that can not be damped by numerical schemes. To overcome these difficulties, the DPSC method is adopted here, in which the Fourier coefficients are computed from flow variables at implicit boundaries instead of circumferential boundaries in the SPSC method. This treatment actually reduces the interaction between the calculation of Fourier coefficients and the update of flow variables. Therefore a faster convergence speed could be achieved and also the solution stability is improved. The present method is developed to be suitable for viscous and turbulent flows. And for real three-dimensional (3D) problems, the rotating effects are also considered. For validation, a 2D oscillating turbine cascade, a 3D oscillating flat plate cascade and a 3D practical transonic fan rotor are investigated. Comparisons with experimental data or other solutions and relevant discussions are presented in detail. Numerical results show that the solution accuracy of DPSC method is favorable and at least comparable to the SPSC method. However, fewer iteration cycles are needed to get a converged and stable unsteady solution, which greatly improves the computational efficiency.
卷号:9
期号:4
页面范围:839-860
ISSN号:2070-0733
是否译文:否
发表时间:2017-08-01
收录刊物:SCIE
通讯作者:陆志良