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反推力装置叶栅布置的气动/结构耦合设计 被引量:5
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作者 张云浩 额日其太 《沈阳工业大学学报》 EI CAS 北大核心 2012年第1期56-62,共7页
为了对叶片布置方案进行改进,采用耦合设计方法对反推力装置的气动性能和结构性能进行预测.利用计算流体力学(CFD)方法模拟装置流场,完成叶片布置方案的气动性能评估;利用有限元分析(FEA)方法分析叶栅叶片的受力情况,完成叶片布置方案... 为了对叶片布置方案进行改进,采用耦合设计方法对反推力装置的气动性能和结构性能进行预测.利用计算流体力学(CFD)方法模拟装置流场,完成叶片布置方案的气动性能评估;利用有限元分析(FEA)方法分析叶栅叶片的受力情况,完成叶片布置方案结构性能的数值模拟.研究了叶栅进气角和出气角对反推效率的影响以及不同叶栅通道数目和叶片加强梁数目对反推装置气动性能和结构性能的影响.研究结果表明,叶栅进气角对反推效率影响不大,减小叶栅出气角可以增大反推效率;减少叶栅通道的数目会造成反推效率的下降,但可以减少叶片数目;减少加强梁的数目会使反推效率提高,降低装置的重量,但会增加叶片的最大应力和最大变形值. 展开更多
关键词 耦合设计 式反推力装置 叶栅布置 数值模拟 气动分析 结构分析 涡轮风扇发动机
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Effect of Winglet Geometry Arrangement and Incidence on Tip Clearance Control in a Compressor Cascade
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作者 HAN Shaobing ZHONG Jingjun +2 位作者 LU Huawei KAN Xiaoxu YANG Ling 《Journal of Thermal Science》 SCIE EI CAS CSCD 2014年第4期381-390,共10页
An experimental study is conducted to investigate the influences of blade tip winglet on the flow field of a compressor cascade. The tests are performed in a low speed linear cascade with stationary endwall, with thre... An experimental study is conducted to investigate the influences of blade tip winglet on the flow field of a compressor cascade. The tests are performed in a low speed linear cascade with stationary endwall, with three blade tip configurations, including the baseline tip, the suction-side winglet tip and the pressure-side winglet tip. The fiowfield downstream of the cascade is measured using five-hole probe, from which the three-dimensional velocity field, vorticity field and pressure field are obtained. Static pressure measurements are made on the endwall above the blade row using pressure taps embedded in the plywood endwall. All measurements are made at both design and off-design conditions for tip clearance level of about 2 percent of the blade chord. The results revealed the incidence variation significantly affects the secondary flow and the associated loss field downstream of the cascade, where the tip leakage vortex and passage vortex exist as the major contributors on the field. The winglet geometry arrangements can change the trajectory of the tip leakage vortex. The suction-side winglet tip blade provides a lower overall total pressure loss coefficient when compared to the baseline tip blade and pressure-side winglet tip blade at all incidence angles. 展开更多
关键词 blade tip winglet compressor cascade INCIDENCE tip clearance flow
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