Measuring and Comparing Frequency Response Functions of Torque Converter Turbines Submerged in Transmission Fluid

Walber, Chad; Blough, Jason R.; Johnson, M. A.; Anderson, C. L.

doi:10.4271/2011-01-1662

Cited by 3 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One team conducted extensive experimental studies on torque converter cavitation. The microwave telemetry technique [11]and the nearfield acoustic test approach [12]were proposed to investigate cavitation phenomena in a series of torque converters. In another approach, Robinette et al tested a matrix of torque converters and developed a dimensionless model for predicting cavitation [13].…”

Section: Figure 1 Schematic Diagram For a Typical Automotive Torque Cmentioning

confidence: 99%

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Liu¹,

Meng²,

Yan³

et al. 2020

Preprint

View full text Add to dashboard Cite

Cavitation inside a torque converter induces noise, vibration and even failure, and these effects have been disregarded in previous torque converter design processes. However, modern high-capacity torque converter applications require attention to this issue. Therefore, this study investigated the cavitation effect on a torque converter using both numerical and experimental methods with an emphasis on the influence of the charging oil feed location and charge pressure. Computational fluid dynamics (CFD) models were established to simulate the transient cavitation behaviour in the torque converter using different charging oil pressures and inlet arrangements and testing against a base case to validate the results. The CFD results suggested that cavitating bubbles mainly takes place in the stator of the torque converter. The transient cavitation CFD model yielded good aggrement with the experimental data, with an error of 7.6% in the capacity constant and 7.4% in the torque ratio. Both the experimental and numerical studies showed that cavitation induced severe capacity degradation, and that the charge pressure and charging oil configuration significantly affects both the overall hydrodynamic performance and the fluid behaviour inside the torque converter because of cavitation. Increasing the charge pressure and charging the oil from the turbine-stator clearance were found to suppress cavitation development and reduce performance degradation, especially in terms of the capacity constant. This study revealed the fluid field mechanism behind the influence of charging oil conditions on torque converter cavitation behaviour, providing practical guidelines for suppressing cavitation in torque converter.

show abstract

Section: Figure 1 Schematic Diagram For a Typical Automotive Torque Cmentioning

confidence: 99%

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Liu¹,

Meng²,

Yan³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…One team conducted extensive experimental studies on torque converter cavitation. The microwave telemetry technique [15] and the nearfield acoustic test approach [16] were proposed to investigate cavitation phenomena in a series of torque converters. In another approach, Robinette et al tested a matrix of torque converters and developed a dimensionless model for predicting cavitation [17].…”

Section: Introductionmentioning

confidence: 99%

“…16 Vapour volume fraction distributions at different time steps over different charge pressures (The oil is supplied from the S-P clearance)…”

mentioning

confidence: 99%

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Liu

Guo

Yan

et al. 2022

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

Cavitation inside a torque converter induces noise, vibration and even failure, and these effects have been disregarded in previous torque converter design processes. However, modern torque converter applications require attention to this issue because of its high-speed and high-capacity requirements. Therefore, this study investigated the cavitation effect on a torque converter using both numerical and experimental methods with an emphasis on the influence of the charging oil feed location and charge pressure. Computational fluid dynamics (CFD) models were established to simulate the transient cavitation behaviour in the torque converter using different charging oil pressures and inlet arrangements and testing against a base case to validate the results. The CFD results suggested that cavitating bubbles mainly takes place in the stator of the torque converter. The transient cavitation CFD model yielded good agreement with the experimental data, with an error of 7.6% in the capacity constant and 7.4% in the torque ratio. Both the experimental and numerical studies showed that cavitation induced severe capacity degradation, and that the charge pressure and charging oil configuration significantly affects both the overall hydrodynamic performance and the fluid behaviour inside the torque converter because of cavitation. Increasing the charge pressure and charging the oil from the turbine-stator clearance were found to suppress cavitation development and reduce performance degradation, especially in terms of the capacity constant. This study revealed the fluid field mechanism behind the influence of charging oil conditions on torque converter cavitation behaviour, providing practical guidelines for suppressing cavitation in torque converter.

show abstract

Torque converter turbine noise and cavitation noise over varying speed ratio

Walber¹

View full text Add to dashboard Cite

Measuring and Comparing Frequency Response Functions of Torque Converter Turbines Submerged in Transmission Fluid

Cited by 3 publications

References 1 publication

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Torque converter turbine noise and cavitation noise over varying speed ratio

Contact Info

Product

Resources

About