Instability of hypersonic flow over a cone

Seddougui, Sharon O.; Bassom, Andrew P.

doi:10.1017/s0022112097006423

Cited by 16 publications

(20 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, they only considered viscous modes and conceded that inviscid instabilities might alter their findings. Seddougui & Bassom (1997) revealed that with increasing radius, i.e. moving in downstream direction, first-mode waves are more amplified than higher-mode waves -a phenomenon already observed by Stetson et al (1983a) in their experiments.…”

Section: 1 Theoretical Investigationsmentioning

confidence: 59%

“…Theoretical work by Seddougui & Bassom (1997) who investigated the linear stability behavior of flow over cones following the triple-deck-formulation revealed the importance of the shock location relative to the cone radius. However, they only considered viscous modes and conceded that inviscid instabilities might alter their findings.…”

Section: 1 Theoretical Investigationsmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Transition in Hypersonic Boundary Layers

Fasel¹,

Groß²,

Koevary³

et al. 2011

View full text Add to dashboard Cite

The public reportmg burd en for th1s collection of mform ation is estimated to average 1 hour per response. includmg the tim e for rev>ewing instruct>ons. searclhing exi sting data so urces. gathering and mmnta1mng the data needed . and co mpleting and rev1ew 1 ng the collection of 1nforma t1 on. Send co mments regarding th1s burden est1m ate or any other aspect o fth1s collection of mformat1on . 1nclud1 ng suggesti ons for reduc1 ng the burden. to the Department of De fense. ExecutiV e Serv1ce D>rectorate (0704 -0 188) Respo ndents should be aware that notwithstanding any other prov1 s1 on of law. no person shall be sub;ect to any penalty for falling to comply w1th a collect> on of 1 nform at1on if 1 t does not display a currently v alid OMB co ntrol number PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ORGANIZATION. 1. REPORT DATE (DD-MM-YYYY)12. REPORT TYPE 3. DATES COVERED (From-To) SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)Air Force Office of Scientific Research, AFOSR/RSA 4015 Wilson Blvd., Room 713, Arlington, VA 22203 SPONSOR/MONITOR'S REPORT NUMBER(S)AFRL-OSR-VA-TR-2012-0255 DISTRIBUTION/AVAILABILITY STATEMENTA -Approved For Public Release; Distribution is Unlimited. SUPPLEMENTARY NOTES ABSTRACTThe laminar-turbulent transition process in supersonic and hypersonic boillldary layers was investigated using spatial and temporal Direct Numerical Simulations (DNS). Our previous research indicated that oblique breakdown might be a highly relevant nonlinear mechanism for supersonic boillldary layers. However, a nonlinear mechanism would only be relevant for the transition process if this mechanism can lead to fully developed turbulence. Hence, to address this question, the late nonlinear transition regime of a supersonic flat-plate boillldary layer at Mach 3 was studied using spatial DNS. These simulations demonstrated that a fully turbulent flow can develop via oblique breakdown. We also investigated the nonlinear disturbance development in a hypersonic bolUldary layer on a sharp circular cone at Mach 8 using spatial and temporal DNS. It was confirmed in these simulations that fimdamental resonance and oblique breakdown are the viable paths to transition in hypersonic boillldary layers. 1S. SUBJECT TERMS

show abstract

Section: 1 Theoretical Investigationsmentioning

confidence: 59%

Section: 1 Theoretical Investigationsmentioning

confidence: 99%

Numerical Simulation of Transition in Hypersonic Boundary Layers

Fasel¹,

Groß²,

Koevary³

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Only looking at viscous modes they stated that inviscid instabilities might alter their findings. Seddougui & Bassom (1997) revealed that with increasing radius, i.e. moving in downstream direc-tion, first-mode waves are higher amplified than higher-mode waves-a phenomenon already observed by Stetson et al (1983) in their experiments.…”

Section: Circular Conementioning

confidence: 62%

“…Theoretical work by Seddougui & Bassom (1997) who investigated the linear stability behavior of flow over cones following the triple-deck-formulation, revealed the importance of the shock location relative to the cone radius. Only looking at viscous modes they stated that inviscid instabilities might alter their findings.…”

Section: Circular Conementioning

confidence: 99%

“…moving in downstream direc-tion, first-mode waves are higher amplified than higher-mode waves-a phenomenon already observed by Stetson et al (1983) in their experiments. Additionally, Seddougui & Bassom (1997) stated that with the shock moving away from the cone surface amplification rates generally drop and axisymmetric waves are more unstable than oblique waves.…”

Section: Circular Conementioning

confidence: 99%

See 1 more Smart Citation