Cavitation simulation of automotive torque converter using a homogeneous cavitation model

Keisuke Tsutsumi, Satoshi Watanabe, Shinichi Tsuda, Takeshi Yamaguchi

Research output: Contribution to conferencePaper

Abstract

To understand the flow mechanism of cavitation and its effect on the performance of automotive torque converter, numerical simulation considering cavitation is carried out at various turbine-pump speed ratios from 0 to 0.8. Since the cavitation in working fluid of torque converter is rather gaseous than vaporous, the partial pressure of air is applied to the cavity pressure in the simplified Rayleigh Plesset cavitation model used in the present simulations. It is found that, for the lower speed ratios (<0.4), the cavitation starts to occur firstly at the stator with the decrease of the ambient pressure, which seems to significantly block the stator passage. The mass flow circulating in the torque converter gradually decreases, which results in the gradual decrease of the pump torque. On the other hand, for the higher speed ratios (>0.6), the cavitation occurs at the pump inlet simultaneously or earlier than that at the stator. Once the cavitation occurs at the pump, the pump torque seems to drop suddenly.

Original languageEnglish
Publication statusPublished - Jan 1 2019
Event16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016 - Honolulu, United States
Duration: Apr 10 2016Apr 15 2016

Conference

Conference16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
CountryUnited States
CityHonolulu
Period4/10/164/15/16

Fingerprint

Torque converters
Cavitation
Pumps
Turbine pumps
Partial pressure
Stators
Torque
Fluids
Computer simulation
Air

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Tsutsumi, K., Watanabe, S., Tsuda, S., & Yamaguchi, T. (2019). Cavitation simulation of automotive torque converter using a homogeneous cavitation model. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.

Cavitation simulation of automotive torque converter using a homogeneous cavitation model. / Tsutsumi, Keisuke; Watanabe, Satoshi; Tsuda, Shinichi; Yamaguchi, Takeshi.

2019. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.

Research output: Contribution to conferencePaper

Tsutsumi, K, Watanabe, S, Tsuda, S & Yamaguchi, T 2019, 'Cavitation simulation of automotive torque converter using a homogeneous cavitation model' Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States, 4/10/16 - 4/15/16, .
Tsutsumi K, Watanabe S, Tsuda S, Yamaguchi T. Cavitation simulation of automotive torque converter using a homogeneous cavitation model. 2019. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.
Tsutsumi, Keisuke ; Watanabe, Satoshi ; Tsuda, Shinichi ; Yamaguchi, Takeshi. / Cavitation simulation of automotive torque converter using a homogeneous cavitation model. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.
@conference{eb16c7ecceaa46e8b6fac76dfbab7246,
title = "Cavitation simulation of automotive torque converter using a homogeneous cavitation model",
abstract = "To understand the flow mechanism of cavitation and its effect on the performance of automotive torque converter, numerical simulation considering cavitation is carried out at various turbine-pump speed ratios from 0 to 0.8. Since the cavitation in working fluid of torque converter is rather gaseous than vaporous, the partial pressure of air is applied to the cavity pressure in the simplified Rayleigh Plesset cavitation model used in the present simulations. It is found that, for the lower speed ratios (<0.4), the cavitation starts to occur firstly at the stator with the decrease of the ambient pressure, which seems to significantly block the stator passage. The mass flow circulating in the torque converter gradually decreases, which results in the gradual decrease of the pump torque. On the other hand, for the higher speed ratios (>0.6), the cavitation occurs at the pump inlet simultaneously or earlier than that at the stator. Once the cavitation occurs at the pump, the pump torque seems to drop suddenly.",
author = "Keisuke Tsutsumi and Satoshi Watanabe and Shinichi Tsuda and Takeshi Yamaguchi",
year = "2019",
month = "1",
day = "1",
language = "English",
note = "16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016 ; Conference date: 10-04-2016 Through 15-04-2016",

}

TY - CONF

T1 - Cavitation simulation of automotive torque converter using a homogeneous cavitation model

AU - Tsutsumi, Keisuke

AU - Watanabe, Satoshi

AU - Tsuda, Shinichi

AU - Yamaguchi, Takeshi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - To understand the flow mechanism of cavitation and its effect on the performance of automotive torque converter, numerical simulation considering cavitation is carried out at various turbine-pump speed ratios from 0 to 0.8. Since the cavitation in working fluid of torque converter is rather gaseous than vaporous, the partial pressure of air is applied to the cavity pressure in the simplified Rayleigh Plesset cavitation model used in the present simulations. It is found that, for the lower speed ratios (<0.4), the cavitation starts to occur firstly at the stator with the decrease of the ambient pressure, which seems to significantly block the stator passage. The mass flow circulating in the torque converter gradually decreases, which results in the gradual decrease of the pump torque. On the other hand, for the higher speed ratios (>0.6), the cavitation occurs at the pump inlet simultaneously or earlier than that at the stator. Once the cavitation occurs at the pump, the pump torque seems to drop suddenly.

AB - To understand the flow mechanism of cavitation and its effect on the performance of automotive torque converter, numerical simulation considering cavitation is carried out at various turbine-pump speed ratios from 0 to 0.8. Since the cavitation in working fluid of torque converter is rather gaseous than vaporous, the partial pressure of air is applied to the cavity pressure in the simplified Rayleigh Plesset cavitation model used in the present simulations. It is found that, for the lower speed ratios (<0.4), the cavitation starts to occur firstly at the stator with the decrease of the ambient pressure, which seems to significantly block the stator passage. The mass flow circulating in the torque converter gradually decreases, which results in the gradual decrease of the pump torque. On the other hand, for the higher speed ratios (>0.6), the cavitation occurs at the pump inlet simultaneously or earlier than that at the stator. Once the cavitation occurs at the pump, the pump torque seems to drop suddenly.

UR - http://www.scopus.com/inward/record.url?scp=85069819685&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85069819685&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85069819685

ER -