INSIGHT INTO RAYLEIGH NUMBER EFFECTS ON TURBULENCE CHARACTERISTICS OF A THERMALLY DRIVEN FLOW ADJACENT TO UPWARD-FACING HORIZONTAL HEATED ROUND PLATE BY LARGE-EDDY SIMULATION

2012 ◽  
Author(s):  
Yasuo Hattori ◽  
Hitoshi Suto ◽  
Shuji Ishihara ◽  
Yuzuru Eguchi
Keyword(s):  
Rayleigh Number ◽  
Large Eddy Simulation ◽  
Round Plate ◽  
Turbulence Characteristics ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Thermally Driven ◽  
Insight Into

scholarly journals Entrained flow gasification. Part 3: Insight into the injector near-field by Large Eddy Simulation with detailed chemistry

Fuel ◽  
2018 ◽  
Vol 223 ◽  
pp. 164-178 ◽  
Author(s):  
Georg Eckel ◽  
Patrick Le Clercq ◽  
Trupti Kathrotia ◽  
Alexander Saenger ◽  
Sabine Fleck ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Near Field ◽  
Detailed Chemistry ◽  
Entrained Flow ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Entrained Flow Gasification ◽  
Insight Into

Investigation of Turbulence Characteristics in a Tip Leakage Flow Model Using Large-Eddy Simulation

2019 ◽  
Author(s):  
Yanfei Gao ◽  
Yangwei Liu ◽  
Lipeng Lu
Keyword(s):  
Large Eddy Simulation ◽  
Flow Model ◽  
Side Wall ◽  
Leakage Flow ◽  
Mean Flow ◽  
Tip Leakage Flow ◽  
Turbulence Characteristics ◽  
Tip Leakage ◽  
Eddy Simulation ◽  
Large Eddy

Abstract A simple tip leakage flow (TLF) model which consists of a square duct with a longitudinal slit on the top of a side wall is proposed to reproduce the jet flow/main flow shear mechanism of the tip leakage vortex (TLV) rolling-up in turbomachinery. Large-eddy simulation (LES) is employed to investigate the turbulence characteristics of the flow model under low Reynolds number condition. The geometry and boundary conditions of the flow model are simplified from a compressor rotor and modified to apply to low-Re condition for LES. The vortex structures and turbulence characteristics of the LES results are compared with the measurements of the rotor. It is found that the flow model could reproduce similar flow field and turbulence structures compared with the TLF in the real rotor, thus it can be used to investigate the turbulence in practical flows. Reynolds-Averaged Navier-Stokes (RANS) calculations are also carried out. The mean flow and turbulence behaviors of different cases are analyzed. The budgets of turbulent kinetic energy (k) are analyzed to investigate the turbulence transport nature in the TLF model, indicating that the non-equilibrium transport process of k is significant, especially the pressure and turbulent transport, which is not predicted by RANS.

PIV experiment and large eddy simulation of turbulence characteristics in a confined impinging jet reactor

2019 ◽  
Vol 27 (1) ◽  
pp. 10-20 ◽  
Author(s):  
Miao Liu ◽  
Zhengming Gao ◽  
Yongjiu Yu ◽  
Zhipeng Li ◽  
Jing Han ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Impinging Jet ◽  
Turbulence Characteristics ◽  
Eddy Simulation ◽  
Large Eddy
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