外文翻译--离心泵叶轮出口流量测量(中文)
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1、PDF外文:http:/ 1 中文 3780 字 出处: KSME international journal, 2002, 16(9): 1147-1155 毕业设计 外文翻译 原文题目: Exit Flow Measurements of a Centrifugal Pump Impeller 译文题目: 离心泵叶轮出口流量测量 &nb
2、sp; 离心泵叶轮出口流量测量 Soon-Sam Hong, Shin-Hyoung Kang* School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151- 742, Korea ABSTRACT: Discharge flows from a centrifugal pump impeller with a specific speed of 150 rpm, ma/min, m were experimental
3、ly investigated. A large axisymmetric collector instead of a volute casing was installed to obtain circumferentially uniform flow, i.e. without interaction of the impeller and the volute. The unsteady flow was measured at the impeller exit and vaneless diffuser using a hot film probe and a pressure
4、transducer. The flow at impeller exit showed pronounced jet-wake flow patterns. The wake, which was on the suction/hub side at high flow rate, became enlarged pitchwisely on both the hub and the shroud side as the flow rate decreases. The pitchwise non-uniformity of the flow rapidly decreased along
5、the downstream and the non- uniformity almost disappeared at radius ratio of 1.18 for medium flow rate. The mean vaneless diffuser flow was reasonably predicted using a one dimensional analysis when an empirical constant was used to specify the skin friction coefficient. The data can be used for a c
6、entrifugal pump impeller design and validation of CFD codes and flow modeling. 摘要: 对特定转速为 150 rpm, m3/min,m的离心泵的流量进行了实验研究。为了获得周向均匀的流动,安装了一个大的轴对称收集器来代替蜗壳。用热膜探头和压力传感器在叶轮出口与无叶扩压器处测量非定常流动。在叶轮出口处表现出明显的喷气尾流模式。在吸入轮毂的高流量侧,轮毂与护罩的间距会随着流量的减少而有明显的放大。节距方向的非均匀性流动沿着下游迅速的降低,在半径比为 1.18 时,介质流率的非均匀性几乎消失。当一个经验常数,用于指定 表
7、面 摩擦系数时,无叶扩压器的流量可以用一维分析合理地预测。这些数据可以用于离 心泵叶轮的设计,以及验证的 CFD 代码和流动造型。 2 KEYWORDS: Centrifugal Pump, Impeller Discharge Flow, Jet-Wake, Vaneless Diffuser, Hot Film Probe 关键词: 离心泵,叶轮下泄流量, 射流 尾迹 ,无叶扩压器,热膜探头 术语 b:通道宽度 &
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