Investigations of Turbulent Flow by Means of the Hot-Wire Anemometer

Temperature Gradients in Turbulent Gas Streams. Point Values of Eddy Conductivity and VISCOSITY.IN Uniform Flow Between Parallel Plates

“…In addition, the measurements of Nikuradse ( 14) and Deissler (5) for flow of water and air in circular tubes are depicted. At Reynolds numbers above 20,000 the present data are in good agreement with the measurements of Deissler (6) and Nikuradse (14) and are bracketed by the work of Skinner (20) and Wattendorf (21). At lower velocity near the transition region the curves are no longer independent of Reynolds number but approach the laminar values calculated from Equation 10.…”

“…The data of Figure 4 fall within the range of values that have been reported for the flow of air between and Predicted Eddy Viscosity Figure 9. Eddy Conductivities at Gross Velocity of 15 Feet per Second parallel plates (11,20,21). In addition, the measurements of Nikuradse ( 14) and Deissler (5) for flow of water and air in circular tubes are depicted.…”

Burners for Supersonic Ram-Jets

“…The explanation is again in terms of the time factor. Overlooking stability (rough burning) considerations, for the present, simple and approximate calculations indicate that the flame velocities estimated (82) for the general turbulence level (89, 40) expected in the unobstructed stream for fully developed pipe flow at Reynolds numbers of about 500,000 are insufficient to establish combustion throughout the entire cross section of the duct in the chamber lengths employed, given, for example, central ignition. A prime function of the igniter is to ensure ignition over a sufficient cross section to permit expanding flame front to involve the entire mixture prior to the burner exit.…”

Report of the Committee on Dynamics of Streams, 1934–35

“…Studies of the Karmin similarity-hypothesis [137] in the theory or turbulence have been made, also the application of statistical mechanics to the theory of turbulent fluid motion [138,139,140], analysis of turbulence in channels of infinite breadth [141]. A recent report has been published giving the results of investigations at the California Institute of Technology [142] of turbulent flow by means of the hot-wire anemom eter; several other pertinent studies of turbulence have been aade recently [143,144], includ ing an application to flow-occurrences in natural rivers [145]. Progress apparently has been made in setting up expressions showing the relation between turbulence and the transportation of sus pended material by streams [146,147,148].…”