دورية أكاديمية
Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch
| العنوان: | Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch |
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| المؤلفون: | Zengxiong Peng, Shihua Yuan |
| المصدر: | Chinese Journal of Mechanical Engineering, Vol 32, Iss 1, Pp 1-7 (2019) |
| بيانات النشر: | SpringerOpen, 2019. |
| سنة النشر: | 2019 |
| المجموعة: | LCC:Ocean engineering LCC:Mechanical engineering and machinery |
| مصطلحات موضوعية: | Drag torque, Wet clutch, Surface tension, Contact angle, Ocean engineering, TC1501-1800, Mechanical engineering and machinery, TJ1-1570 |
| الوصف: | Abstract Reduction of drag torque in disengaged wet clutches is essential for transmission research because it is one of the potentials of efficiency improvement. Aeration of oil film between two closely rotating plates promotes the decrease of drag torque at high speed region. The effects of surface tension and static contact angles during aeration are non-negligible showed by test results. The traditional lubrication model does not adequately predict the experimental results with different surface tension and contact angles during aeration. Hence, in this present paper, contact angles between Aluminum and Teflon materials were firstly measured, and the drag torques under two different contact angles were examined experimentally. An improved lubrication model of drag torque based on Navier–Stokes equations at the gas-liquid interface was built. The lubrication boundary condition was modified to introduce the effects of surface tension and contact angle. The model shows that the effects at the beginning of aeration of oil film are significant. These effects almost occur at stationary plate due to low Reynolds number and Weber number. The model shows that an increase in the surface tension promotes aeration, but does not affect the peak drag torque. Increasing contact angle also promotes the aeration, and accelerates the decrease of drag torque. The larger contact angle is, the smaller the peak drag torque will be. A computational fluid dynamics (CFD) model based on volume of fluid (VOF) method was presented to validate the interface shape when aeration occurs. The model prediction has a good agreement with experimental observations for Aluminum plates and Teflon plates. The modified lubrication model of drag torque gives a convenient description of the effects of surface tension and contact angel, and lays down a frame to understand the beginning of aeration. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1000-9345 2192-8258 |
| العلاقة: | http://link.springer.com/article/10.1186/s10033-019-0343-9Test; https://doaj.org/toc/1000-9345Test; https://doaj.org/toc/2192-8258Test |
| DOI: | 10.1186/s10033-019-0343-9 |
| الوصول الحر: | https://doaj.org/article/a041c46864e840798fa97944870a5e4cTest |
| رقم الانضمام: | edsdoj.041c46864e840798fa97944870a5e4c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 10009345 21928258 |
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| DOI: | 10.1186/s10033-019-0343-9 |