【摘 要】
：
High-fidelity aerodynamic optimization of compressors is afflicted by the“curse of dimensionality”,which limits its engineering applications.This paper proposes a new multi-degrees-of-freedom(MDOF)surface parameterization method that combines the characte
【机 构】
：
Key Laboratory of Light-duty Gas-turbine,Institute of Engineering Thermophysics,Chinese Academy of S
论文部分内容阅读
High-fidelity aerodynamic optimization of compressors is afflicted by the“curse of dimensionality”,which limits its engineering applications.This paper proposes a new multi-degrees-of-freedom(MDOF)surface parameterization method that combines the characteristics of conventional surface parameterization methods,low-dimensionality and surface smoothness,with the advantages of design flexibility and ease of construction.The proposed method is applied to the high-fidelity aerodynamic optimization of Rotor37.An optimized solution is obtained within 111 h by combining a phased optimization strategy based on the idea of modal optimization.To explore a better way of setting the control variables of the blade body,two methods of varying the control points of the suction and pressure surfaces,independent change and synchronous change,are compared.Synchronous change has better flexibility,and under the condition of satisfying the constraints,it increases the efficiency at the design point by 2.2％and the surge margin by 0.5％.This demonstrates the effectiveness of the proposed method in the high-fidelity aerodynamic optimization of compressors.It also provides technical support to solve the“curse of dimensionality”problem.
其他文献
2017年8月对大亚湾海域浮游群落初级生产、群落呼吸代谢及其平衡特征进行了研究,并分析了其潜在环境影响因素以及对沿岸生态系统功能与健康的指示作用.研究结果表明,大亚湾夏季海水表层呈自养状态,而底层呈异养状态,群落总初级生产力(gross primary productivity,GPP)、呼吸代谢速率(community respiration,CR)与净生产力(net commutnitiy production,NCP)在表层分别为1335.36±910.12、597.86±403.30和737.50
The Paris Agreement has prompted much interest in the societal and health impacts of limiting global warming to 1.5℃and 2℃.Previous assessments of differential impacts of two targets indicate that 1.5℃warming target would substantially reduce the impact o
为解决海洋中大量观测数据只含有温度剖面而缺乏盐度观测的问题,基于历史观测的温盐剖面资料,考虑到盐度卫星数据的发展,采用回归分析方法,在孟加拉湾建立了盐度与温度、经纬度、表层盐度的关系,并对不同反演方法的反演结果进行检验评估。结果发现,在不引入海表盐度(sea surface salinity, SSS)时,最佳反演模型是温度、温度的二次项与经纬度确定的回归模型,而SSS的引入则可以进一步优化反演结
Nearly-zero energy buildings(NZEB)would effectively improve building energy efficiency and promote building electrification.By using a carbon emission model integrated into a bottom-up mid-to-long term energy consumption model,this study analyzes the cont
Numerical simulation of single-bubble growth behavior during nucleate pool boiling was developed based on the volume of fluid method considering the thin liquid layer under the bubble(microlayer).However,the experimental values of apparent contact angle(t
Collaborative governance between ecological environment and climate change is a novel signature in China\'s policy agenda.However,such coordination remains understudied,especially at the local level.Using the principal component analysis,entropy evaluat
High thermal conductivity of carbon nanotube nanofluids(knf)has received great attention.However,the current researches are limited by experimental conditions and lack a comprehensive understanding of knf variation law.In view of proposition of data-drive
Climate change with increasing temperature is making a significant impact on human health,including more heat-related diseases,and increasing the burden on the healthcare system.Although many studies have explored the association between increasing temper
The monovacancy defect effect on thermal conductivity of bilayer graphene nanoribbons(BGNs)was investigated using non-equilibrium molecular dynamics(NEMD)simulations in this work.Our results demonstrate that the presence of monovacancy defect in BGNs redu
China,like many countries,is under great pressure to reduce climate change and adapt to current situations while simultaneously undertaking economic development and transformation.This study takes advantage of climate opportunities and provides a new conc