scholarly journals Experimental Investigation of Rotor/Rotor Interaction in a Hydrodynamic Torque Converter Using Hot-Film Anemometry

1994 ◽  
Author(s):  
Volker Browarzik
Keyword(s):  
Computer Animation ◽  
Internal Flow ◽  
Torque Converter ◽  
Ensemble Averaging ◽  
Pump Impeller ◽  
Flow Measurements ◽  
Turbine Inlet ◽  
Computer Based ◽  
Hot Film ◽  
Hot Film Anemometry

Unsteady flow measurements were performed to investigate the internal flow field of a torque converter, especially unsteady rotor/rotor-interaction in the region between pump exit and turbine inlet. Instantaneous flow data were measured with hot-film probes and a computer based data acquisition system. The commonly used ensemble averaging method was adapted to this special case with two independently rotating impellers. Velocity profiles of the flow in the relative frame of reference of the pump impeller were evaluated and they were used to generate a computer animation. The paper gives an overview over the test facilities and the background of the present investigations. It follows a discussion of some essential aspects concerning the use of hot-film anemometry. The methods used to evaluate the data are described in detail and measuring results of the region between pump exit and turbine inlet are presented.

Non-Steady Flow Measurements Inside a Hydrodynamic Torque Converter by Hot-Film Anemometry

1992 ◽  
Author(s):  
V. Browarzik ◽  
K. G. Grahl
Keyword(s):  
Flow Field ◽  
Steady Flow ◽  
Torque Converter ◽  
Operating Conditions ◽  
Measuring System ◽  
Pump Impeller ◽  
Flow Measurements ◽  
First Results ◽  
Hot Film ◽  
Hot Film Anemometry

The overall-characteristics of hydrodynamic torque converters have been discussed often, although there is little knowledge about the flow field inside the circuit. During former investigations at our institute flow measurements have been made and a CFD-program was developed to calculate the flow through the guide vanes and the pump impeller. Our present studies now examine the non-steady flow field at the inlet and outlet of the pump and the turbine impeller by means of hot-film anemometry and a computer based measuring system. The measuring techniques have been developed and now measurements are made at different operating points. Later the measurements will be performed with special regard to non-steady changes of operating conditions. The paper describes the test facilities, the measuring equipment and the techniques used to evaluate the measured data. First results of test measurements are presented.

scholarly journals Analysis of Flow Within Pump Impeller of Torque Converter

1996 ◽  
Author(s):  
Hoshio Tsujita ◽  
Shimpei Mizuki ◽  
Eiji Ejiri
Keyword(s):  
Coordinate System ◽  
Secondary Flow ◽  
Three Dimensional ◽  
Internal Flow ◽  
Torque Converter ◽  
Flow Patterns ◽  
Speed Ratio ◽  
Meridional Plane ◽  
Pump Impeller ◽  
Simple Method

It is difficult to measure flow patterns within rotating elements of a torque converter due to the complicated construction. Therefore, the numerical calculation is considered to be an effective tool to know the internal flow. Three-dimensional incompressible turbulent flow within a pump impeller of an automotive torque converter was analyzed numerically at three different speed ratios, 0.02, 0.4 and 0.8 under the same inlet boundary condition. The speed ratio was defined as the ratio of rotating speed of the turbine impeller to that of the pump. The governing equations using the k-ε model in the physical component tensor form were solved with a boundary-fitted coordinate system fixed on a rotating impeller. The solution algorithm was the SIMPLE method applied to the curvilinear coordinate system. The computed results were compared with those obtained experimentally by an oil film flow visualization technique for the pressure, suction, core and shell surfaces. Moreover, the results at three different speed ratios were examined in detail in order to clarify the behavior of secondary flow patterns. The computed results showed good agreement with the experimental results and clarified the behavior of the complicated flow patterns. The secondary flow patterns were strongly influenced by the correlation between the intensities of the Corinlis force (COF) and the centrifugal force due to the passage curvature in the meridional plane (CMF).

A computer-based hot-film technique for two-phase flow measurements

1995 ◽  
Vol 6 (10) ◽  
pp. 1528-1537 ◽  
Author(s):  
B Farrar ◽  
A L Samways ◽  
J Ali ◽  
H H Bruun
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Measurements ◽  
Computer Based ◽  
Hot Film

scholarly journals Three-Dimensional Flow Measurements in a Turbine Scroll

1984 ◽  
Vol 106 (2) ◽  
pp. 516-522 ◽  
Author(s):  
W. Tabakoff ◽  
B. V. R. Vittal ◽  
B. Wood
Keyword(s):  
Flow Velocity ◽  
Secondary Flow ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow ◽  
Through Flow ◽  
Hot Film ◽  
Hot Film Anemometry

A study was conducted to determine experimentally the flow behavior in combined scroll nozzle assembly of a radial inflow turbine. Hot film anemometry technique was used to measure the three-dimensional flow velocity in the scroll. The through-flow and secondary flow velocity components are measured at various points in three scroll sections.

Flow Measurements in a Turbine Scroll

1980 ◽  
Vol 102 (3) ◽  
pp. 290-296 ◽  
Author(s):  
W. Tabakoff ◽  
Y. Sheoran ◽  
K. Kroll
Keyword(s):  
Flow Velocity ◽  
Flow Behavior ◽  
Flow Measurements ◽  
Radial Inflow Turbine ◽  
Hot Film ◽  
Hot Film Anemometry

A study was conducted to determine experimentally the flow behavior in the combined scroll nozzle assembly of a radial inflow turbine. Hot film anemometry technique was used to measure the flow velocity in the scroll.

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