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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >A new methodology for preliminary design of centrifugal impellers with prewhirl
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A new methodology for preliminary design of centrifugal impellers with prewhirl

机译：一种新方法，用于预畏缩叶轮的初步设计

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摘要

The overall trend of centrifugal compressor design is to strive for high aerodynamic performance and high flow capacity products. A new methodology is derived to implement a preliminary design for high flow capacity centrifugal impeller with and without prewhirl. First, several new non-dimensional equations connecting impeller geometric and aerodynamic parameters are derived for the maximum flow capacity. The effects of prewhirl on mass flow function, inlet diameter ratio and work coefficient are discussed, respectively. Then, based on these equations, a series of design diagrams are drawn to extract the universal rules in centrifugal impeller design with prewhirl. Some physical limits of design maps are also discussed. Finally, the throat area of impeller is discussed under prewhirl, and the matching principle between prewhirl impeller and vaned diffuser is derived and validated. The proposed method can be used to design a new centrifugal compressor, or to evaluate the design feasibility and the challenge of a given design specification.
机译：离心式压缩机设计的整体趋势是努力寻求高空气动力学性能和高流量产物产品。推导出一种新的方法，为高流量容量离心叶轮进行了初步设计，具有和不需要撬动。首先，导出用于最大流量的几个连接叶轮几何和空气动力学参数的新的非维度方程。讨论了Prewhirl对质量流量，入口直径比和工作系数的影响。然后，基于这些等式，绘制了一系列设计图，以利用Prewhirl提取离心叶轮设计中的通用规则。还讨论了设计地图的一些物理限制。最后，在Prewhirl下讨论了叶轮的喉部区域，衍生和验证了Prewhirl叶轮和叶片扩散器之间的匹配原理。该方法可用于设计新的离心式压缩机，或评估给定设计规范的设计可行性和挑战。

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