Numerical analysis of the drag reduction for turbulent pulsating pipe flows based on large eddy simulations
NING Tao, GU Chunwei
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
Abstract：Large eddy simulations were conducted for turbulent pulsating flows using the commercial solver ANSYS-CFX. The drag reduction and the total energy consumption for pulsating flows were analyzed. The simulations included current dominated and wave dominated pulsating flows. The boundary layer characteristics of the current flow were affected by the superposition of the wave flow. The best drag reduction in the pulsating flows gave a 25% drag reduction when the non-dimensional pulsating amplitude was 5.5. The analysis indicates that the drag reduction is optimized when the pulsating flow is wave dominated and the wave boundary layer is laminar. Pulsating flows with simple sinusoidal pulsating patterns consume much more energy than steady flows.
宁涛, 顾春伟. 基于大涡模拟的圆管脉动湍流减阻数值分析[J]. 清华大学学报（自然科学版）, 2017, 57(5): 511-515.
NING Tao, GU Chunwei. Numerical analysis of the drag reduction for turbulent pulsating pipe flows based on large eddy simulations. Journal of Tsinghua University(Science and Technology), 2017, 57(5): 511-515.
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2017, Vol. 57 
