Multi-vane expanders: Vane dynamics and friction losses
Multi-vane expanders: Vane dynamics and friction losses
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DOI：
10.1016/0306-2619(85)90018-2
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发表时间：
1985
期刊：
影响因子：
11.2
通讯作者：
O. Badr;S. Probert;P. O'callaghan
中科院分区：
文献类型：
--
作者：
O. Badr;S. Probert;P. O'callaghan
机械摩擦和粘性阻力是多叶片膨胀机功率损失的主要原因。因此，一个数学模型已被开发来描述这些损失现象。所构建的动态模型被用来研究叶片和定子气缸之间的接触损失，这导致显着的内部泄漏损失。以R-113为工质，详细分析了现有的两种多叶片膨胀机的设计方案。用编制的计算机子程序预测了不同设计参数和工况对膨胀机机械效率的影响，结果表明，多叶片膨胀机的摩擦功率损失主要是由于叶片与定子-汽缸的摩擦引起的。可以控制现有膨胀机的操作条件，或者可以选择用于特定应用的所提出的膨胀机的最佳设计参数，以便使适当的多叶片膨胀机的机械效率最大化。
Mechanical friction and viscous drag represent major causes of power loss in multi-vane expanders. So a mathematical model has been developed to describe these loss phenomena. The constructed dynamic model was employed to investigate the loss of contact between the vanes and the stator-cylinder, which results in significant internal leakage losses. Two existing designs of multi-vane expander were considered in detail when using R-113 as the working fluid. The composed computer sub-routines were used to predict the effects of the different design parameters and operating conditions on the mechanical efficiencies of the expanders.The predictions obtained indicate that most of the frictional power loss in a multi-vane expander occurs due to the rubbing of the vanes against the stator-cylinder. Either the operating conditions for an existing expander can be controlled, or the optimal design parameters of a proposed expander for a particular application can be selected, in order to maximise the appropriate multi-vane expander's mechanical efficiency.