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液力耦合器三維瞬態(tài)流場大渦模擬與特性預(yù)測
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    摘要:

    采用大渦模擬,、流動控制方程耦合求解法及多可動區(qū)域計(jì)算的滑動網(wǎng)格法,，對液力耦合器內(nèi)部瞬態(tài)三維流動控制方程組進(jìn)行了耦合求解。對三維流場模擬結(jié)果進(jìn)行深入分析,，以進(jìn)一步了解耦合器內(nèi)部流動規(guī)律,，優(yōu)化設(shè)計(jì)其結(jié)構(gòu),。同時(shí)，根據(jù)三維流場數(shù)值解計(jì)算了各個(gè)工況下液力耦合器葉輪轉(zhuǎn)矩,，進(jìn)而預(yù)測其性能,，將性能預(yù)測結(jié)果與實(shí)驗(yàn)結(jié)果進(jìn)行比較，二者誤差在7％以內(nèi),，驗(yàn)證了大渦模擬方法及特性預(yù)測的準(zhǔn)確,，說明采用的液力耦合器流場的模擬方法具有良好的工程應(yīng)用價(jià)值。

    Abstract:

    The transient control equations of 3-D flow in hydrodynamic coupling were coupled calculated by using the methods of large eddy simulation (LES), flow control equation coupled solution, and sliding mesh method for multi-flow regions in CFD software. In order to learn the flow laws of flow field deeply and optimize the structure, the numerical solution of the 3-D flow field has been analyzed. The torque in each impeller of hydrodynamic coupling was figured out based on the numerical solution of the 3-D flow field. Then the characteristic of hydrodynamic coupling was predicted. The prediction characteristic has been compared with the experimental result; it is found that the error between them is less than 7%, which could prove the effectiveness of the numerical simulation method and characteristic prediction. Then the conclusion has been drawn that the numerical simulation method for the flow field of hydrodynamic coupling has applicable value in engineering. 

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褚亞旭,劉春寶,馬文星.液力耦合器三維瞬態(tài)流場大渦模擬與特性預(yù)測[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(10):169-173.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(10):169-173.

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