The Experts below are selected from a list of 4872 Experts worldwide ranked by ideXlab platform

Ronald D Flack - One of the best experts on this subject based on the ideXlab platform.

  • velocity measurements in an automotive Torque converter part i average pump measurements
    Tribology Transactions, 1999
    Co-Authors: Leonard D Whitehead, Ronald D Flack
    Abstract:

    The flow field in the inlet, mid- and exit planes of the pump of an automotive Torque converter was measured using laser velocimetry. Three turbine/pump speed ratios (0.065, 0.600, and 0.800) were tested and average velocities are presented and analyzed. Data presented in this paper embody the most detailed velocity measurements in Torque Converters available. The highest through flow velocities generally occurred at the shell side of the blades in all measurement planes and at all speed ratios. For all speed ratios the flow entered the pump inlet plane with a velocity deficit occurring at the core side. The flow was able to become more uniform before it reached the mid-plane at the speed ratio of 0.065, while at the higher speed ratios the flow field demonstrated a large separation region at the mid-plane in the suction side/core quadrant. The flow field was more uniform in the exit plane at all speed ratios and separation was not observed. The secondary flow in the pump mid-plane is counter-clockwise. O...

Houston G. Wood - One of the best experts on this subject based on the ideXlab platform.

  • Development and validation of a CFD based optimization procedure for the design of Torque converter cascade
    Taylor & Francis Group, 2019
    Co-Authors: Cheng Liu, Changle Xiang, Qingdong Yan, Wei Wei, Cori Watson, Houston G. Wood
    Abstract:

    Traditional one-dimensional (1D) design theory no longer satisfies modern Torque converter design requirements due to the lack of accuracy and long trial-and-error process. A computational fluid dynamics (CFD) based optimization approach was brought forward. This study is devoted to two key processes in bringing CFD into Torque converter design – blade parameterization/evaluation and optimization. A six-parameter blade camber line design method was employed to represent the blade shape. The blade profile was evaluated based on manufacturability considerations. A low-fidelity CFD model was developed for parameter study and optimization, and a high-fidelity CFD model considering the transient and cavitation effects was employed to evaluate the optimization outcome. The parameter sensitivity study was performed using design of experiment (DOE) technique and the variables were categorized into primary design variable, effective design variable and insignificant design variable groups. Optimization on the primary variables was carried out using the genetic algorithm. Two optimum solutions were evaluated with the transient full 3D CFD model and then tested. The optimum Torque Converters’ test results indicated significant performance improvement. The proposed design procedure can improve the design efficiency & accuracy and shorten the design cycle by the application of different CFD models in conjunction with an optimization algorithm

Leonard D Whitehead - One of the best experts on this subject based on the ideXlab platform.

  • velocity measurements in an automotive Torque converter part i average pump measurements
    Tribology Transactions, 1999
    Co-Authors: Leonard D Whitehead, Ronald D Flack
    Abstract:

    The flow field in the inlet, mid- and exit planes of the pump of an automotive Torque converter was measured using laser velocimetry. Three turbine/pump speed ratios (0.065, 0.600, and 0.800) were tested and average velocities are presented and analyzed. Data presented in this paper embody the most detailed velocity measurements in Torque Converters available. The highest through flow velocities generally occurred at the shell side of the blades in all measurement planes and at all speed ratios. For all speed ratios the flow entered the pump inlet plane with a velocity deficit occurring at the core side. The flow was able to become more uniform before it reached the mid-plane at the speed ratio of 0.065, while at the higher speed ratios the flow field demonstrated a large separation region at the mid-plane in the suction side/core quadrant. The flow field was more uniform in the exit plane at all speed ratios and separation was not observed. The secondary flow in the pump mid-plane is counter-clockwise. O...

Mordorski Eric - One of the best experts on this subject based on the ideXlab platform.

  • DEVELOPMENT OF A DYNAMIC TORSIONAL ACTUATOR FOR Torque CONVERTER CLUTCH CHARACTERIZATION
    Digital Commons @ Michigan Tech, 2018
    Co-Authors: Mordorski Eric
    Abstract:

    This thesis outlines the development of a torsional shaker test stand capable of testing damping and isolation capabilities of Torque converter clutch assemblies in automotive Torque Converters. By utilizing an electric motor typically found in hybrid electric vehicles, the desired Torque fluctuations can be achieved for these measurements. The electric motor can be used as a “torsional shaker” to impose torsional vibrations originating from an internal combustion engine. A synchronous model was developed to evaluate the electric motor to ensure it could produce the required dynamic Torque behavior. AMESim models were developed and used to correlate analytical and experimental vibration measurements. The measurements of interest are primarily associated with the damper clutch assembly and its respective stiffness and damping properties. The developed system was found capable of reasonably producing dynamic torsional vibration similar to an internal combustion engine and finding the dominating converter clutch resonance

Cheng Liu - One of the best experts on this subject based on the ideXlab platform.

  • Development and validation of a CFD based optimization procedure for the design of Torque converter cascade
    Taylor & Francis Group, 2019
    Co-Authors: Cheng Liu, Changle Xiang, Qingdong Yan, Wei Wei, Cori Watson, Houston G. Wood
    Abstract:

    Traditional one-dimensional (1D) design theory no longer satisfies modern Torque converter design requirements due to the lack of accuracy and long trial-and-error process. A computational fluid dynamics (CFD) based optimization approach was brought forward. This study is devoted to two key processes in bringing CFD into Torque converter design – blade parameterization/evaluation and optimization. A six-parameter blade camber line design method was employed to represent the blade shape. The blade profile was evaluated based on manufacturability considerations. A low-fidelity CFD model was developed for parameter study and optimization, and a high-fidelity CFD model considering the transient and cavitation effects was employed to evaluate the optimization outcome. The parameter sensitivity study was performed using design of experiment (DOE) technique and the variables were categorized into primary design variable, effective design variable and insignificant design variable groups. Optimization on the primary variables was carried out using the genetic algorithm. Two optimum solutions were evaluated with the transient full 3D CFD model and then tested. The optimum Torque Converters’ test results indicated significant performance improvement. The proposed design procedure can improve the design efficiency & accuracy and shorten the design cycle by the application of different CFD models in conjunction with an optimization algorithm