摘要
针对非定常两代流型理论的验证展开了大量的试验研究工作 .为了简化同时又能抓住问题的本质 ,试验研究首先从平面叶栅风洞上起步 .在测得各个工况下叶栅后旋涡脱落特征频率的基础上 ,采用声激励的试验手段 ,系统研究了非定常扰动之间的相互作用 .通过加激励前后总压损失的对比、流场特征参数频谱图的对比和具体气动参数的对比 ,证实了合理组织各个非定常扰动的相互作用可以提升叶栅的气动性能 ,说明了“非定常耦合流型”
A lot of work was done in planar cascade tunnel to validate the theory on two generations of unsteady flow type. In the first phase, the frequency of all kinds of work condition was got. In the second phase, the method of sound excitation was used based on the frequency got forward to research the interaction between variable unsteady disturbances. Through comparing the total pressure loss, frequency spectra of flowfield's parameter and aerodynamic parameters of unforced condition with those of forced condition, the results of research confirm that the aerodynamic performance of cascade can improved if the interaction of unsteady disturbs in the flowfield can reasonable organization.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2005年第1期56-59,共4页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金资助项目 ( 10 0 72 0 0 8)
高校博士学科点专项科研基金资助项目 ( 2 0 0 0 0 0 0 615 )
关键词
平面叶栅
声激励
涡脱落
Acoustics
Aircraft
Cascades (fluid mechanics)
Data processing
Turbomachine blades
Unsteady flow
Vortex shedding
