外文翻譯--離心泵葉輪出口流量測(cè)量(中文(已修改)
2025-06-01 06:08 本頁(yè)面
【正文】 1 中文 3780字 出處： KSME international journal, 2020, 16(9): 11471155 畢業(yè)設(shè)計(jì) 外文翻譯 原文題目： Exit Flow Measurements of a Centrifugal Pump Impeller 譯文題目： 離心泵葉輪出口流量測(cè)量 離心泵葉輪出口流量測(cè)量 SoonSam Hong, ShinHyoung 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 experimentally investigated. A large axisymmetric collector instead of a volute casing was installed to obtain circumferentially uniform flow, . 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 transducer. The flow at impeller exit showed pronounced jetwake 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 nonuniformity of the flow rapidly decreased along the downstream and the non uniformity almost disappeared at radius ratio of 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 centrifugal pump impeller design and validation of CFD codes and flow modeling. 摘要： 對(duì)特定轉(zhuǎn)速為 150 [rpm, m^3/min,m]的離心泵的流量進(jìn)行了實(shí)驗(yàn)研究。為了獲得周向均勻的流動(dòng)，安裝了一個(gè)大的軸對(duì)稱收集器來代替蝸殼。用熱膜探頭和壓力傳感器在葉輪出口與無葉擴(kuò)壓器處測(cè)量非定常流動(dòng)。在葉輪出口處表現(xiàn)出明顯的噴氣尾流模式。在吸入輪轂的高流量側(cè)，輪轂與護(hù)罩的間距會(huì)隨著流量的減少而有明顯的放大。節(jié)距方向的非均勻性流動(dòng)沿著下游迅速的降低，在半徑比為 ，介質(zhì)流率的非均勻性幾乎消失。當(dāng)一個(gè)經(jīng)驗(yàn)常數(shù)，用于指定 表面 摩擦系數(shù)時(shí)，無葉擴(kuò)壓器的流量可以用一維分析合理地預(yù)測(cè)。這些數(shù)據(jù)可以用于離 心泵葉輪的設(shè)計(jì)，以及驗(yàn)證的 CFD 代碼和流動(dòng)造型。 2 KEYWORDS: Centrifugal Pump, Impeller Discharge Flow, JetWake, Vaneless Diffuser, Hot Film Probe 關(guān)鍵詞： 離心泵，葉輪下泄流量， 射流 — 尾跡 ，無葉擴(kuò)壓器，熱膜探頭 術(shù)語 b：通道寬度 ? ：切線方向的相對(duì)氣流角 C：絕對(duì)速 度
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1