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液力減速器充液過程瞬態(tài)特性三維數(shù)值模擬
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國家自然科學(xué)基金青年科學(xué)基金資助項目（50905016）;車輛傳動國家重點(diǎn)實驗室基金資助項目（9140C3405020905）


Numerical Investigation on Transient Oil-filling Process of Hydraulic Retarder
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    摘要:

    為得到緊急充液過程中的液力減速器瞬態(tài)內(nèi)流場特性及制動外特性,，基于瞬態(tài)流場計算方法建立了某型液力減速器相應(yīng)的仿真模型,。結(jié)合實際車用工況確定了入,、出油口的流速,，設(shè)置了精確的初始流場作為邊界和初始條件,，運(yùn)用CFD技術(shù)對液力減速器緊急制動工況的充液過程進(jìn)行流場分析及制動外特性仿真計算,。以動輪初始轉(zhuǎn)速2640r/min緊急充液過程為例分析了液力減速器流道內(nèi)腔速度,、總壓,、湍流動能分布特點(diǎn)，并對制動外特性仿真結(jié)果與試驗數(shù)據(jù)進(jìn)行了對比,，仿真誤差為12.7%,。表明仿真模型和方法較為合理、準(zhǔn)確,，瞬態(tài)流場仿真方法能更全面地反映液力減速器充液過程中隨時間變化的流場內(nèi)特性及制動外特性,。

    Abstract:

    With the aim to obtain the time-varying braking performance of emergency oil-filling process of hydraulic retarder, a numerical simulation model of flow channel was established based on transient CFD method. The inlet velocity, outlet velocity and a steady flow field result were calculated and applied as the boundary condition and initial condition. Then the transient simulation of emergency oil-filling process was calculated when the initial rotor rotating speed was 2640r/min. The pressure, the velocity and the turbulence kinetic energy distribution of internal flow field under different braking time were studied, and the time-varying braking torque was calculated by CFD post-processing analysis. Comparison of the experimental data and simulation results showed that the calculation tolerance of the braking torque was 12.7%. It is indicated that the simulation method and model are accurate and reliable, and the transient simulation method is more appropriate to predict the time-varying braking performance of hydraulic retarder.

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閆清東,鄒波,魏巍,于濤.液力減速器充液過程瞬態(tài)特性三維數(shù)值模擬[J].農(nóng)業(yè)機(jī)械學(xué)報,2012,43(1):12-17. Yan Qingdong, Zou Bo, Wei Wei, Yu Tao. Numerical Investigation on Transient Oil-filling Process of Hydraulic Retarder[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(1):12-17.

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  • 在線發(fā)布日期: 2012-01-12
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