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

Abstract

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.

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

“…A miniFORCE micro computer system is used for data acquisition and to control the torque converter and most of the peripheral test equipment. It was described in an earlier paper so here only the main features will be summarised [5].…”

“…Evaluation of single sensor data was performed using an extension to King's Law proposed by Siddal and Davies [10]. For the X-probes a time consuming full velocity and angular calibration was performed [9,11,5].…”

“…The internal flow field of hydrodynamic torque converters is very complex and there is only little knowledge about it. During the last few years several new projects started to investigate the internal flow conditions in torque converters by means of modem measuring techniques and CFD simulation [2, 5,6,8,12,13].…”

Strömungsuntersuchung in hydrodynamischen Wandlern: Zusammenspiel von Messung und Rechnung

“…Mel~werterfassung und -verarbeitungDer Aufbau des Datenerfassungssystem ist in Bild 5 dargestelh und entspricht weitgehend der in[1, 5,6,7,14] beschriebenen Anordnung. Den Kern bildet ein ProzetSrechner mit Echtzeitbetriebssystem, der fiber mehrere Interface-Karten sowie fiber eine A/D-Wandlerkarte mit einer Aufl6sung yon12 Bit und einer Abtastrate yon 150 kHz verffigt.…”

Experimental Investigation of Steady and UnsteadyFlow Field Upstream and Downstream of anAutomotive Torque Converter Pump

“…Brunet al, 1996;Marathe et al, 1997;Gruver et al, 1996;By et al, 1995;Browarzik and Grahl, 1992). A brief review of this is given in Backstr6m and Lakshminarayana (1996).…”