流体流动输出功率装置的性能特性

Performance Characteristics of a Fluid Flow Power Converter

将具有传热不可逆性的动力装置功率优化传热原理扩展到流体流动分析。存在流体阻力的活塞—汽缸装置可作出有用功率。导出功率输出与效率间的关系，包含了最大效率、最大功率及其相应效率等结果。分析了活塞摩擦损失、非线性压降流率关系对性能的影响。讨论了总体尺寸约束下的性能优化问题。将所得结果与内可逆热机、等温内可逆化学机和电路特性作了比较。本文结果可应用于稳态轴功率部件，如透平、压气机和泵的性能分析与优化中。

The heat transfer principle of power maximization in power plants with heat transfer irreversibilities is extended to fluid flow. The useful power can be extracted from the piston and cylinder apparatus exsisting flow resistauce. The relation between power output and efficiency, which involves the maximum efficiency, the maximum power and the corresponding efficiency bound, is derived based on the linear flow resistance relation. The infldences of the piston cylinder friction and nonlinear flow resistance relations on the performance are analysed. Performance optimization is performed based on the overall size constraints. The analogy among the fluid flow power converters, endoreversible heet engines, endoreversible isothermal chemical engines, and ideal motor powered by elecerically battery is stressed. The results can be applied to the performance analyses and optimization for steady flow shaft power components, such as turbines, compressors, pumps, etc..