Correlations to predict turbulent streamwise influence regions and onset of transition in supersonic flows

dc.contributor.advisor John C. Tannehill
dc.contributor.author Ramesh, Manohari
dc.contributor.department Aerospace Engineering
dc.date 2018-08-25T01:26:48.000
dc.date.accessioned 2020-07-02T06:00:23Z
dc.date.available 2020-07-02T06:00:23Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2003
dc.date.issued 2003-01-01
dc.description.abstract <p>Correlation functions have been developed to predict both the extent of the streamwise influence regions in supersonic turbulent flows, and the onset of transition in supersonic flow past a flat plate. These correlations are empirical relations involving a priori known flow parameters. In the turbulent flow regime, correlations that can compute the extent of the upstream and downstream regions of influence in two-dimensional compression ramp and expansion corner flowfields have been developed. The correlations were obtained by analyzing numerically computed flowfields. Regression analysis using the least squares approach was applied to the computed flowfield data to determine the correlation functions. The turbulent correlations can be used in conjunction with an iterative parabolized Navier-Stokes algorithm to minimize the region of iteration and thereby reduce the computational time. In the transitional region, correlation functions that can accurately predict the onset of transition over a flat plate have been determined in a similar manner. The transitional correlations can be used in conjunction with any flow solver in order to automatically determine the onset of transition and apply a turbulence model for closure at the appropriate location. The general form of these correlation functions, the wide range of applicability, and their ease of calculation makes them a handy tool for engineering design purposes. The accuracy of these functions is demonstrated by comparing them with experimental and empirical data available in the literature.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/742/
dc.identifier.articleid 1741
dc.identifier.contextkey 6080454
dc.identifier.doi https://doi.org/10.31274/rtd-180813-9897
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/742
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/80295
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/742/r_3118256.pdf|||Sat Jan 15 01:48:02 UTC 2022
dc.subject.disciplines Aerospace Engineering
dc.subject.disciplines Fluid Dynamics
dc.subject.disciplines Plasma and Beam Physics
dc.subject.keywords Aerospace engineering and engineering mechanics
dc.subject.keywords Aerospace engineering
dc.title Correlations to predict turbulent streamwise influence regions and onset of transition in supersonic flows
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication 047b23ca-7bd7-4194-b084-c4181d33d95d
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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