| 黄鹏,尹益辉,李顺利,王鹏飞,余绍蓉.离心机风阻功率及启动过程分析[J].装备环境工程,2015,12(5):105-110. HUANG Peng,YIN Yi-hui,LI Shun-li,WANG Peng-fei,YU Shao-rong.Analysis of Wind Resistance Power and Starting Process of Centrifuge[J].Equipment Environmental Engineering,2015,12(5):105-110. |
| 离心机风阻功率及启动过程分析 |
| Analysis of Wind Resistance Power and Starting Process of Centrifuge |
| 投稿时间：2015-08-01 修订日期：2015-10-10 |
| DOI：10.7643/issn.1672-9242.2015.05.018 |
| 中文关键词: 离心机 风阻功率 动量矩定理 能量守恒原理 |
| 英文关键词:centrifuge wind resistance power moment of momentum theorem principle of conservation of energy |
| 基金项目:国家重大科学仪器设备开发专项项目 （2011YQ130047）；国家自然科学基金青年项目 （11102195， 11302208） |
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| 中文摘要: |
| 目的 研究离心机的风阻功率和启动过程。方法 针对圆柱形机室内运行的离心机， 分析机室内空气承受的悬臂力矩和摩擦力矩， 基于动量矩定理和流场的线性分布假设推导随流比方程，给出随流比的显式表达式， 继而导出离心机风阻功率的计算公式。结果 针对恒扭矩启动条件， 得到了离心机角速度和风阻功率随时间变化的函数关系； 基于能量守恒原理， 得到了机室内的空气温升。结论 基于离心机的设计参数， 给出了角速度和风阻功率的时间变化曲线。通过该项目的研究， 为离心机的工程设计提供了理论依据。 |
| 英文摘要: |
| Objective To study the wind resistance power and the starting process of centrifuge. Methods Targeting at the centrifuge which was operated in the cylindrical chamber, the arm moment and the friction moment applied to air were analyzed. Based on the moment of momentum theorem and the linear distribution assumption of air flow field, the equation of air flow ratio was deduced. Then, the explicit expression of air flow ratio was proposed, thus, the calculation formula of wind resistance power was derived. Results The functional relationship of the centrifuge angular velocity and the wind resistance power with time was deduced in the condition of constant starting torque of centrifuge. Based on the principle of energy conservation, the temperature rise of air was evaluated in the chamber. Conclusion Based on the design parameters of the centrifuge, this study proposed the time-angular velocity curve and the time-wind resistance power curve. The results of this study can be used as the theory basis in the centrifuge engineering design. |
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