TY - GEN
T1 - The Effect of Reynolds Number in Compressible Channel Flow
AU - Ma, Rui
AU - Gao, Zheng Hong
AU - Chen, Shu Sheng
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - In this paper, the direct numerical simulation is applied to investigate the compressible channel flow with Re=3000, 6800, 10800, 21000 and Mach number Ma=0.8.The Reynolds number effect on the statistical characteristics of the turbulence in a compressible channel is studied, as well. It is found that the high Reynolds number effect in incompressible flow also exists in compressible flow when the Reynolds number increases to Re=21000 (Reτ=1040), but some statistical results need to be corrected when Ma=0.8. For example, the Von Kamen number in the Logarithm Law in the turbulent boundary layer is suggested to be modified to 0.417 when Ma=0.8. Unlike the term of generation of turbulent kinetic energy is balanced with the term of dissipation in incompressible turbulence, the generation term of the turbulent kinetic energy in the logarithmic region of a compressible turbulence is approximately 1.2 times than that of the dissipation term. The phenomenon of "scale separation"in incompressible turbulence also exists in the compressible turbulent boundary layer, but the location of large scale in the outer region is farther from the wall and the length of streamwise scale is shorter in the pre-multiplied power spectra of the streamwise velocity fluctuation.
AB - In this paper, the direct numerical simulation is applied to investigate the compressible channel flow with Re=3000, 6800, 10800, 21000 and Mach number Ma=0.8.The Reynolds number effect on the statistical characteristics of the turbulence in a compressible channel is studied, as well. It is found that the high Reynolds number effect in incompressible flow also exists in compressible flow when the Reynolds number increases to Re=21000 (Reτ=1040), but some statistical results need to be corrected when Ma=0.8. For example, the Von Kamen number in the Logarithm Law in the turbulent boundary layer is suggested to be modified to 0.417 when Ma=0.8. Unlike the term of generation of turbulent kinetic energy is balanced with the term of dissipation in incompressible turbulence, the generation term of the turbulent kinetic energy in the logarithmic region of a compressible turbulence is approximately 1.2 times than that of the dissipation term. The phenomenon of "scale separation"in incompressible turbulence also exists in the compressible turbulent boundary layer, but the location of large scale in the outer region is farther from the wall and the length of streamwise scale is shorter in the pre-multiplied power spectra of the streamwise velocity fluctuation.
KW - compressible channel flow
KW - direct numerical simulation
KW - Reynolds number effect
KW - scale separation
UR - http://www.scopus.com/inward/record.url?scp=85137260475&partnerID=8YFLogxK
U2 - 10.1109/ICMAE56000.2022.9852906
DO - 10.1109/ICMAE56000.2022.9852906
M3 - 会议稿件
AN - SCOPUS:85137260475
T3 - 2022 13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022
SP - 396
EP - 401
BT - 2022 13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022
Y2 - 20 July 2022 through 22 July 2022
ER -