Shock and turbulence interactions

Gatski, Thomas B.; Bonnet, Jean-Paul

doi:10.1016/b978-0-08-044565-6.00012-9

Cited by 3 publications

(3 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As this figure shows, the bifurcation of the shock foot could be captured quite accurately using the WMLES subgrid model. and Bonnet [37]. Therefore, all results reported in the paper are time-averaged.…”

Section: Geometry and Boundary-conditionsmentioning

confidence: 95%

Three dimensional CFD investigation of shock train structure in a supersonic nozzle

2015

View full text Add to dashboard Cite

Section: Geometry and Boundary-conditionsmentioning

confidence: 95%

Three dimensional CFD investigation of shock train structure in a supersonic nozzle

2015

View full text Add to dashboard Cite

“…The properties and mechanisms of the compressible wall-bounded flows are some of the most active fields of turbulence study due to the drastic importance in the aerospace industry (Smits & Dussauge 2006;Gatski & Bonnet 2009;Urzay 2018;Candler 2019;Theofilis, Pirozzoli & Martin 2022;Zhang, Zhao & Yang 2023). A considerable amount of studies has been concentrated on investigating the flow statistics of the hypersonic turbulent zero-pressure-gradient boundary layers (Duan, Beekman & Martin 2010Lagha et al 2011;Chu, Zhuang & Lu 2013;Zhang, Duan & Choudhari 2018;Xu et al 2021aXu et al ,b, 2022bXu, Wang & Chen 2022a;Huang, Duan & Choudhari 2022;Zhang et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Reynolds number and wall cooling effects on correlations between the thermodynamic variables in hypersonic turbulent boundary layers

Wang

Chen

2023

J. Fluid Mech.

View full text Add to dashboard Cite

The Reynolds number and wall cooling effects on correlations between the thermodynamic variables are systematically investigated in hypersonic turbulent boundary layers by direct numerical simulations. The correlations between the thermodynamic variables and the streamwise velocity are also analysed. The Kovasznay decomposition is introduced to decompose the fluctuating density and temperature into the acoustic and entropic modes. It is found that in the strongly cooled wall cases, the travelling-wave-like alternating positive and negative structures (TAPNSs) are found in the fluctuating pressure and the acoustic modes of density and temperature, and the streaky entropic structures (SESs) are identified in the fluctuating entropy and the entropic modes of density and temperature near the wall. Furthermore, both the acoustic and the entropic modes of density and temperature give significant contributions to the correlations involving density and temperature in the near-wall region, while these correlations are almost totally contributed by the entropic modes in the far-wall region. The entropic modes of the density and temperature are almost linearly correlated with the fluctuating entropy. Therefore, the fact that the fluctuating entropy is strongly correlated with the fluctuating density and temperature far from the wall is mainly due to the dominance of the entropic modes in the fluctuating density and temperature. Moreover, the fluctuating temperature is strongly positively correlated with the fluctuating streamwise velocity near the wall in strongly cooled wall cases, which can be ascribed to the appearance of the TAPNSs and SESs.

show abstract

“…The mechanisms of the hypersonic turbulent boundary layers are of great importance in the aerospace industry due to the direct application to hypersonic vehicles (Smits & Dussauge 2006;Gatski & Bonnet 2009). It has been widely observed that the cold wall can significantly enhance the compressibility effect near the wall in hypersonic turbulent boundary layers (Duan, Beekman & Martin 2010;Zhang, Duan & Choudhari 2017, 2018Xu et al 2021aXu et al ,b, 2022bHuang, Duan & Choudhari 2022;Xu, Wang & Chen 2022a).…”

Section: Introductionmentioning

confidence: 99%

Wall cooling effect on spectra and structures of thermodynamic variables in hypersonic turbulent boundary layers

Xu,

Wang,

Chen

2023

J. Fluid Mech.

View full text Add to dashboard Cite

The wall cooling effect on the spectra and structures of thermodynamic variables are investigated in hypersonic turbulent boundary layers. The density and temperature can be divided into the acoustic and entropic modes based on the Kovasznay decomposition. The intensities of the pressure and the acoustic modes of density and temperature attain the maximum values near the wall, while those of the entropy and the entropic modes of density and temperature achieve their primary peaks near the edge of the boundary layer. In the near-wall region, the pressure and the acoustic modes of density and temperature are significantly enhanced when the wall is strongly cooled, which can be attributed to the appearance of the travelling-wave-like alternating positive and negative structures. Moreover, the intensities of the entropy and the entropic modes of density and temperature become stronger near the wall as the wall temperature decreases, due to the appearance of the streaky entropic structures (SES). The SES are mainly caused by the advection effect of the strong positive wall-normal gradient of the mean temperature associated with ejection and sweep events. It is also found that the profiles of the intensities of the entropy, density and temperature are similar to each other far from the wall, which is mainly due to the reason that the entropic modes are dominant in the fluctuating density and temperature in the far-wall region. The acoustic modes of density and temperature only have significant contributions in the near-wall region.

show abstract

Shock and turbulence interactions

Cited by 3 publications

References 87 publications

Three dimensional CFD investigation of shock train structure in a supersonic nozzle

Three dimensional CFD investigation of shock train structure in a supersonic nozzle

Reynolds number and wall cooling effects on correlations between the thermodynamic variables in hypersonic turbulent boundary layers

Wall cooling effect on spectra and structures of thermodynamic variables in hypersonic turbulent boundary layers

Contact Info

Product

Resources

About