A Method of Selecting Planar Flow Model for the Design Performance of Torque Convertors

doi:10.7652/xjtuxb201707012

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A Method of Selecting Planar Flow Model for the Design Performance of Torque Convertors

更新时间：2025-07-09

- A Method of Selecting Planar Flow Model for the Design Performance of Torque Convertors
- Vol. 51, Issue 7, Pages: 78-83+155(2017)
- 作者机构：
  
  同济大学机械与能源工程学院,上海,201804
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201707012
  CLC： TH137.332
- Online First：10 July 2017，
  
  Published：2017
- 稿件说明：
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A Method of Selecting Planar Flow Model for the Design Performance of Torque Convertors[J]. 2017, 51(7): 78-83+155.
DOI：

A Method of Selecting Planar Flow Model for the Design Performance of Torque Convertors[J]. 2017, 51(7): 78-83+155. DOI： 10.7652/xjtuxb201707012.

摘要

为探求叶轮平面流模型与变矩器起步转矩比、效率、最大能容等设计性能间的动力学映射关系

以双涡轮液力变矩器为研究对象

提出了面向变矩器设计性能的叶轮平面流模型选用方法。在通过变矩器台架试验验证其计算流体力学(CFD)仿真精度的基础上

利用正交试验法

将变矩器4个叶轮及反势流、等速流和有势流模型3种典型平面流模型的全部组合设计为9个叶轮及平面流模型的组合模型

并进行CFD仿真试验。依据仿真试验结果

定量分析不同叶轮平面流模型对变矩器各设计性能的影响

对于叶片角组合满足基本设计性能要求的变矩器

可以通过选用合适的叶轮平面流模型

提高其性能:若以起步转矩比评价变矩器

采用导轮为等速流或有势流、第一涡轮为有势流或反势流模型; 若以效率评价变矩器

采用导轮为等速流或反势流、泵轮为反势流模型; 若以最大能容评价变矩器

采用导轮为等速流模型。所提面向变矩器设计性能的叶轮平面流模型选用方法

可以在叶片数、叶片角度、叶片厚度不变的情况下

通过合理选用平面流模型提升变矩器某方面性能

对提高其变矩器设计性能具有工程参考价值。

Abstract

Aiming at improving the design performance of hydraulic torque convertors

a method of selecting applicable impeller planar flow model was put forward

taking twin-turbine torque converter as the study object

to study the dynamic mapping relationship between the impeller planar flow model and hydraulic torque convertor design performance(starting torque ratio

efficiency and maximal capacity). Nine composite models were designed for computational fluid dynamics simulation tests by orthogonal test method with three classic planar flow models(irrotational flow

uniform flow and rotational flow models)and four impellers. The accuracy of CFD simulation was proved by hydraulic torque convertor bench test. The performance affected by different impeller planar flow models was analyzed quantitatively according to the results of simulation test. The performance could be enhanced by selecting appropriate impeller planar flow model for all the torque converters where the blade angle combinations can meet the basic design performance requirements: considering the evaluation criteria of torque ratio

uniform or rotational flow models should be selected to design the stator and irrotational flow model should be selected to design the first turbine. Focusing on efficiency

uniform or irrotational flow models should be selected to design the stator and irrotational flow model should be selected to design the pump. To get maximal capacity

uniform flow model should be selected to design the stator. With the method proposed in this paper

the performance could be improved by changing the planar flow model without changing the number of blades

the blade angle and blade thickness. The method could be taken as a good reference for improving the performance of hydraulic torque convertors in engineering.

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references

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