本文選題：液力變矩器 + 計(jì)算流體力學(xué)�。� 參考：《機(jī)械工程學(xué)報(bào)》2016年14期

【摘要】：液力變矩器內(nèi)部為復(fù)雜的三維非定常湍流流動(dòng),為分析變矩器泵輪內(nèi)部三維非定常流動(dòng)特性,建立液力變矩器非定常計(jì)算流體力學(xué)(Computational fluid dynamics,CFD)仿真分析模型,并通過(guò)激光多普勒測(cè)速(Laser Doppler anemometry,LDA)技術(shù)手段對(duì)該模型進(jìn)行驗(yàn)證分析。研究泵輪轉(zhuǎn)速800 r/min,速比為0.6工況下,不同渦輪和導(dǎo)輪位置,對(duì)于泵輪內(nèi)流場(chǎng)非定常流動(dòng)現(xiàn)象的影響。結(jié)果表明:該非定常CFD模型結(jié)果與LDA測(cè)試結(jié)果相吻合,且能夠較為準(zhǔn)確地反映泵輪內(nèi)流場(chǎng)非定常流動(dòng)狀態(tài),作為泵輪流場(chǎng)的上游,相對(duì)于渦輪對(duì)泵輪內(nèi)部流動(dòng)的影響,導(dǎo)輪對(duì)泵輪內(nèi)流動(dòng)狀態(tài)的影響較大,并主要影響泵輪入口面附近。渦輪主要影響泵輪內(nèi)流場(chǎng)中間面到出口面的尾流低速區(qū),但影響幅度相對(duì)于導(dǎo)輪較小。
[Abstract]:The fluid torque converter is a complicated three-dimensional unsteady turbulent flow. In order to analyze the three-dimensional unsteady flow characteristics in the pump wheel of torque converter, a simulation analysis model of unsteady computational fluid dynamics (CFD) of hydraulic torque converter is established. The model was verified and analyzed by laser Doppler velocimetry and laser Doppler anemometry. The effects of different turbine and guide wheel positions on the unsteady flow in the pump wheel are studied at the speed of 800 r / min and the speed ratio of 0.6. The results show that the unsteady CFD model is consistent with the LDA test results, and can accurately reflect the unsteady flow state in the pump wheel. As the upstream of the pump rotation field, the effect of the turbine on the flow inside the pump wheel can be compared with that of the turbine. The guide wheel has a great influence on the flow state in the pump wheel, and mainly affects the inlet surface of the pump wheel. The turbine mainly affects the wake low speed zone from the middle surface to the outlet surface of the pump wheel, but the influence range is smaller than that of the guide wheel.
【作者單位】： 北京理工大學(xué)機(jī)械與車(chē)輛學(xué)院;中國(guó)北方車(chē)輛研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51475041)
【分類(lèi)號(hào)】：TH137.332

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