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Research Papers: Flows in Complex Systems

Parametric Analysis and Optimization of Inlet Deflection Angle in Torque Converters1

[+] Author and Article Information
Cheng Liu, Qingdong Yan, Wei Wei

Beijing Institute of Technology,
School of Mechanical Engineering,
Beijing 100081, China

Alexandrina Untaroiu

University of Virginia,
Mechanical and Aerospace
Engineering Department,
Rotating Machinery and Controls
(ROMAC) Laboratory,
122 Engineer's Way,
Charlottesville, VA 22904-4746
e-mail: au6d@virginia.edu

Houston G. Wood

University of Virginia,
Mechanical and Aerospace
Engineering Department,
Rotating Machinery and Controls
(ROMAC) Laboratory,
122 Engineer's Way,
Charlottesville, VA 22904-4746

This paper was presented in part at the ASME Congress 2013, Paper No. IMECE2013-64783.

2Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received February 27, 2014; final manuscript received August 13, 2014; published online October 8, 2014. Assoc. Editor: Satoshi Watanabe.

J. Fluids Eng 137(3), 031101 (Oct 08, 2014) (10 pages) Paper No: FE-14-1102; doi: 10.1115/1.4028596 History: Received February 27, 2014; Revised August 13, 2014

The inlet deflection angle is an important blade design parameter with respect to both performance and manufacturability of torque converters. This study investigated the influence of the inlet deflection angle on the performance of torque converters and a method of optimizing the inlet deflection angle for torque converters based on 3D flow simulation is presented. Parameter analysis and multi-objective optimization were performed on an automated 3D flow simulation platform. The results indicate that the mass flow rate increases with a decreasing difference between the pump outlet deflection angle and the turbine inlet deflection angle, consequently increasing pump capacity factor. The advantages of the method proposed are an improved design quality and a significantly shorter design cycle.

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References

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Figures

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Fig. 1

Torque converter torus and definition of inlet deflection angle

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Fig. 2

Blade geometry of base model

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Fig. 3

Simulation results and durations versus natural logarithm of element quantity

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Fig. 4

Periodic CFD simulation model

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Fig. 5

Comparison of calculated and experimental performance characteristics of base torque converter. (a) steady state simulation results against experimental data and (b) transient simulation results against experimental data.

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Fig. 6

Integrated 3D torque converter optimization flow

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Fig. 7

Optimization results

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Fig. 8

Pareto chart for ηmax

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Fig. 9

Pareto chart for TR0

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Fig. 10

Pareto chart for λ0

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Fig. 11

Main effect plot for ηmax

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Fig. 12

Main effect plot for TR0

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Fig. 13

Main effect plot for λ0

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Fig. 14

Blade geometry and CFD results for averaged meridional velocity distribution (θp = 0)

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Fig. 15

Blade geometry and CFD results for averaged meridional velocity distribution (θp = 5)

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Fig. 16

Blade geometry and CFD results for averaged meridional velocity distribution (θp = 10)

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Fig. 17

Velocity flow angle distribution at pump–turbine interface with pump blade frame and turbine inlet line (θp = 0). (a) T0 + 651 ΔT and (b) T0 + 654 ΔT.

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Fig. 18

Velocity flow angle distribution at pump–turbine interface with pump blade frame and turbine inlet line (θp = 5). (a) T0 + 651 ΔT and (b) T0 + 654 ΔT.

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Fig. 19

Velocity flow angle distribution at pump–turbine interface with pump blade frame and turbine inlet line (θp = 10). (a) T0 + 651 ΔT and (b) T0 + 654 ΔT.

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