Analysis and Judgment of the Local Loss Based on the Entropy Gradient
Analysis of the flow loss is important in the turbomachinery,the current analysis methods based on the cumulative loss such as the total pressure loss coefficient and the adiabatic efficiency,and the local loss method reflect the loss,can t quickly reflect the physical principles that leads the loss and its development.To solve this problem,the paper based on the first and second laws of thermodynamics,a local losses model about the compressor internal flow was estimated using the entropy gradient,give a dimensionless loss function parameter Ⅰ,and was verified in a three-dimensional numerical simulation about Rotor67.The numerical results show that:the model can quickly capture the magnitude and location of loss,it also can reflect the loss source,when the dimensionless parameter (I) > (I)c,the area is considered as an high loss area,the local loss is expressed as Ⅰ.If the parameter (I) near the wall for negative value indicates that reflux occurred.
local loss the entropy gradient reflux irreversibility
Wang Lijuan Li Qiushi Qian Yuping
National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
国际会议
北京
英文
792-796
2012-12-16（万方平台首次上网日期，不代表论文的发表时间）