999C1a:GA101/00/1057 - Search Results - Digital Repository

guest :: login Digital Repository
		Search		Submit		Help		About

Home > Search Results: 999C1a:GA101/00/1057

Search:

Search Tips :: Advanced Search

Search collections:

Sort by:	Display results:	Output format:

	Conditional analysis of the wall friction histograms in transitional boundary layers Jonáš, Pavel ; Mazur, Oton ; Uruba, Václav Results of conditional analysis of the wall friction time series acquired in a boundary layer transitional region are given. Detailed record
	Preliminery results of conditional anaysis of the wall-friction during boundary layer transition Jonáš, Pavel ; Mazur, Oton ; Uruba, Václav The wall-friction is intermittently changing laminar/turbulent nature during bondary lazer transition. The indicator function is used for the determination of the transitional intermittency factor was employed for the conditional analysis of the wall friction. Namely there were derived the mean durations of the wall-friction stays in laminar and turbulent conditions and some statistical characteristics of wall-friction during the appointed conditions Detailed record
	Approximation of the intermittency factor distribution at bypass boundary layer transition Jonáš, Pavel ; Mazur, Oton ; Uruba, Václav The distribution of the imtermittency factor is discussed in the case of boundary layer by-pass transition. The approximation of Narasimha is modified for the case when the intermittency distribution does not start from zero value at the location of the transition start. Detailed record
	Fluid dynamics 2001 Jonáš, Pavel ; Uruba, Václav The proceedings contain 32 texts of the contributions from the conference from the fields Fluid dynamics. Detailed record
	Comment of the application of the intermittency factor measurement to increase the accuracy of hte determination of the boundary layer transition start Jonáš, Pavel ; Mazur, Oton ; Stepien, M. ; Uruba, Václav A method of the direct assessment of the intermittency factor distribution inside a transitional boundary layer under outer stream turbulence was developed and proved. It was justified that the Narasimha approximation is not accurate at such boundary itions as the basic assumption that the boundary layer upstream the start of transition is not turbulent, is not valid. The proposed modification of Narasimha formulae seems to be more accurate. Detailed record
	Implementation and futher application of refined transition prediction methods for turbomachinery and other aerodynamics flows. /Z - 1307/ Jonáš, Pavel ; Příhoda, Jaromír The report deals with mathematical modelling and experimental investigation of the bypass transition in boundary-layer flows. The modelling of bypass transition is based on two-layer turbulence models and an algebraic intermittency model. The effect of velocity and length scales of free-stream turbulence on the onset and the end of the transition region for flat-plate boundary layer was investigated experimentally. Detailed record
	The application of the bypass-transition model in the viscous/inviscid interaction Příhoda, Jaromír ; Kladrubský, M. The work deals with the numerical solution of flow over aerofoils and/or blades using a viscous/inviscid interaction method based on the solution of Euler equations and the integral dissipation method for the boundary-layer calculation. Detailed record
	A comment on the choice of intermittency measurement method for by-pass transition investigation Jonáš, Pavel ; Mazur, Oton ; Uruba, Václav The relevance of the investigation of the intermittency factor distributions inside transitional boundary layers is discussed. The prepaired procedure is outlined of measurements and evaluations of the intermittency factor. Detailed record
	On the intermittent nature of the flow structure at by-pass transition of a flat plate boundary layer Jonáš, Pavel ; Mazur, Oton ; Uruba, Václav The aim of the study is to add to the understanding and description of by-pass transition through precise measurement of the flow parameters. Detailed record
	Physical conception of a vortical nature of turbulence Jonáš, Pavel The principal ideas on turbulent flows, on vortex structure of turbulence, main attributes of turbulence and on the important features of turbulence at high Reynolds number are presented in the paper. Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.

Digital Repository :: :: :: ::
Powered by v1.1.2
Maintained by

This site is also available in the following languages:
Česky English