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Heat Transfer Research

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ISSN Print: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v31.i1-2.30
pages 9-12

Structure of Turbulent Gas Flow under Conditions of Hydrodynamic Nonstationarity

V. B. Bukharin
Moscow State Aviation Institute, Moscow, Russia
Guenrikh A. Dreitser
Department of Aviation-Space Thermal Techniques, Moscow Aviation Institute, Volokolamskoe shosse, 4, Moscow, 125993, Russia
V. M. Kraev
Moscow State Aviation Institute (Technical University), Moscow, Russia
A. S. Neverov
Moscow State Aviation Institute, Moscow, Russia


A method of measurement is found and some experiments are made concerning the determination of the longitudinal and radial components of the air speed in a tube with a time history of the gas flow rate. A constant temperature thermoanemometer with an X-shaped movable probe was used. Different profiles of the longitudinal and radial velocity components, their fluctuations and for correlations are presented for accelerating and decelerating flows. It is shown that in unsteady processes these parameters differ substantially from their quasisteady values. The validity of the hydrodynamic unsteady parameter as an integral parameter for the generalization of experimental data is substantiated.