Predicting the Onset of Cavitation in Automotive Torque Converters—Part II: A Generalized Model
The objective of this investigation was to develop a dimensionless model for predicting the onset of cavitation in torque converters applicable to general converter designs. Dimensional analysis was applied to test results from a matrix of torque converters that ranged from populations comprised o...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2008-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2008/312753 |
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| Summary: | The objective of this investigation was to develop a dimensionless model for predicting the
onset of cavitation in torque converters applicable to general converter designs. Dimensional analysis was
applied to test results from a matrix of torque converters that ranged from populations comprised of strict
geometric similitude to those with more relaxed similarities onto inclusion of all the torque converters
tested. Stator torque thresholds at the onset of cavitation for the stall operating condition were experimentally
determined with a dynamometer test cell using nearfield acoustical measurements. Cavitation torques, design
parameters, and operating conditions were resolved into a set of dimensionless quantities for use in the
development of dimensionless empirical models. A systematic relaxation of the fundamental principle of
dimensional analysis, geometric similitude, was undertaken to present empirical models applicable to torque
converter designs of increasingly diverse design parameters. A stepwise linear regression technique coupled
with response surface methodology was utilized to produce an empirical model capable of predicting stator
torque at the onset of cavitation with less than 7% error for general automotive
torque converter designs. |
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| ISSN: | 1023-621X 1542-3034 |