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基于流場特性的液力緩速器葉柵角度優(yōu)化設(shè)計
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國家自然科學基金青年科學基金資助項目（51305156）、中國博士后科學基金資助項目（2011M500602）和江蘇省汽車工程重點實驗室開放基金資助項目（QC201201）


Cascade Angle Optimization of Hydraulic Retarder Based on Flow Field Characteristics
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    摘要:

    為了提高液力緩速器制動轉(zhuǎn)矩系數(shù)，對液力緩速器內(nèi)湍流流動進行了三維瞬態(tài)多相流數(shù)值模擬。通過對其內(nèi)流場特性分析，發(fā)現(xiàn)液力緩速器工作流道的壁面脫離現(xiàn)象以及弦面內(nèi)產(chǎn)生的渦旋區(qū)不利于恒定制動轉(zhuǎn)矩的輸出。針對這一問題，考慮到液力緩速器各結(jié)構(gòu)參數(shù)之間的相關(guān)性，對多參數(shù)共同作用的內(nèi)流場進行數(shù)值分析，優(yōu)化葉柵參數(shù)。結(jié)果表明，通過分析多參數(shù)共同作用的流場來優(yōu)化緩速器葉柵參數(shù)的方法比較合理；對液力緩速器葉片前傾角和葉片前緣倒角進行優(yōu)化后，葉輪流道內(nèi)存在的渦團和流動分離現(xiàn)象基本消失，制動轉(zhuǎn)矩系數(shù)提高6%。

    Abstract:

    In order to improve the braking torque coefficient, the numerical simulation of 3D transient multiphase flow was performed to the turbulent flow in Hydraulic Retarder. By the analysis of internal flow field characteristics, both the flow separation phenomenon in the work flow channel and the vortex generated in the chord surface went against the output of the braking torque. To solve this problem, considering correlation between the structural parameters of hydraulic retarder, numerical analysis based on multi-parameter flow field was performed, and the blade cascade parameters were optimized. The results showed that, the method through the analysis of the multi-parameter flow field to optimize blade cascade parameters was reasonable. When the blade angle and chamfer angle were optimized, the vortex and the flow separation phenomenon in the flow channel of impeller disappeared and the braking torque coefficient increased by 6%. 

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李雪松,劉春寶,程秀生,苗麗穎.基于流場特性的液力緩速器葉柵角度優(yōu)化設(shè)計[J].農(nóng)業(yè)機械學報,2014,45(6):20-24,37. Li Xuesong, Liu Chunbao, Cheng Xiusheng, Miao Liying. Cascade Angle Optimization of Hydraulic Retarder Based on Flow Field Characteristics[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(6):20-24,37.

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  • 收稿日期:2013-10-12
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  • 在線發(fā)布日期: 2014-06-10
  • 出版日期: 2014-06-10