National Repository of Grey Literature 139 records found  beginprevious129 - 138next  jump to record: Search took 0.01 seconds. 
3rd periodic progress report - implementation and further application of refined transition prediction methods for turbomachinery and other aerodynamics flows /Z 1289/00/
Jonáš, Pavel
In the report it is presented a summary of results received in the framework of TRANSPRETURB Network in the period from September 1999 up to February 2000.
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.
Characteristics of a HW X-probe at an universal orientation in an air flow
Mazur, Oton ; Uruba, Václav
Considering general orientation of the X hot-wire probe in an air stream expressions for the effectiv cooling velocities of both wires (in JőrgensenŽs form) was derived and proper calibration procedure described
Effect of surfactants ageing on drag reduction
Mík, Václav ; Myška, Jiří
Four different surfactants were investigated in a closed hydraulic loop in order to find the influence of age of the solution on drag reducing effectiveness and on decrease of critical shear stress. It shows that ageing of a particular surfactant is dependent on its concentration. Different sensitivity of solutions to flow disturbances indicates an individualism of single surfactants with worm-like micelles.

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