Cavitation Control in Turbomachinery by J-Groove.

J-Groove 的涡轮机械空化控制。

• 批准号: 14350090
• 负责人: KUROKAWA Junichi
• 金额: $ 10.43万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350090/
• 关键词: Turbomachinery; Cavitation Control; J-Groove; Centrifugal Pump; Inducer; Closed Impeller; Suction Performance; Rotating Cavitation; Jグループ; 吸込比速度; J-Groove; キャビテーション数; 流体機械; キャビテーション; 吸い込み性能; 旋回逆流

Cavitation occurring in turbomachinery is one of the great obstacles, and it has made users and designers to suffer many troubles. Therefore, many researchers have been tried to overcome or suppress the abnormal phenomenon by use of the conventional methods of raising pressure in a minimum pressure region such as making suction height of a pump low, reducing loss of the inlet pipe or installing an inducer and a booster pump as positive methods. However, because cavitation is a physical phenomenon, it is impossible to completely restrain outbreak itself of cavitation, but it is thought that to some extent it can be suppressed internally.The investigators of this project have proposed shallow grooves, which is named "J-Groove", mounted on a casing wall of turbomachinery in the pressure gradient direction of mainstream as a countermeasure of various abnormal flow phenomena. From the previous related studies, it has been verified that J-Groove has the function of suppressing various abnorm … More al flow phenomena with rotation by controlling the angular momentum of mainstream, as well as one more important function of increasing the pressure in a low pressure region by carrying the high pressure fluid to the low pressure region. Thus, if the latter function of increasing low pressure can be applicable to the control of cavitation, suppression of the cavitation occurring in turbomachinery can be possible.The purpose of present study is to control and suppress cavitation occurring in turbomachinery by use of J-Groove.The research results showed that the suction performance of turbopump with inducer can be improved considerably by application of J-Groove with proper configuration. Moreover, rotating cavitation and cavitation surge occurring in the inducer can be almost suppressed by adopting J-Groove. Improvement of suction performance in centrifugal pumps with both closed impeller and semi-open impeller can be possible by use of J-Groove without decreasing pump efficiency in the range of whole flowrate. Less

汽蚀现象是叶轮机械的一大障碍，给用户和设计者带来了诸多困扰。因此，许多研究者试图利用常规的在最小压力区域提高压力的方法来克服或抑制这种异常现象，如降低泵的吸入高度，减少进气管的损失或安装诱导器和增压泵作为积极的方法。然而，由于空化是一种物理现象，因此不可能完全抑制空化本身的爆发，但认为可以在一定程度上从内部抑制空化。本课题研究人员提出在涡轮机械机匣壁上沿主流压力梯度方向安装浅槽，并将其命名为“j型槽”，作为应对各种异常流动现象的对策。在前人的相关研究中，已经证实j型槽具有通过控制主流的角动量来抑制各种随旋转的异常流动现象的功能，还有一个重要的功能是通过将高压流体输送到低压区来增加低压区的压力。因此，如果后一种增加低压的功能能够适用于空化的控制，则可以抑制涡轮机械中发生的空化。本研究的目的是利用j型槽控制和抑制涡轮机械中的空化现象。研究结果表明，采用合理配置的j型槽可以显著提高带诱导轮的涡轮泵的吸力性能。采用j型槽几乎可以抑制诱导体内的旋转空化和气蚀喘振。在全流量范围内，采用j型槽可以在不降低泵效率的前提下，提高闭式和半开式离心泵的吸入性能。少

项目成果

今村博, 黒川淳一, 松井純, 菊地将史: "Jグループによるインデューサのキャビテーション抑制"日本機会学会2003年度年次大会講演会論文集. 1-2 (2003)

Hiroshi Imamura、Junichi Kurokawa、Jun Matsui、Masashi Kikuchi：“J 组对诱导器空化的抑制”日本机械工程学会 2003 年年会记录 1-2 (2003)。

Cavitation Control in a Centrifugal Pump by J-Groove

通过 J-Groove 控制离心泵中的气蚀

• 发表时间: 2005
• 期刊: Proc.of 6^<th> KSME-JSME Thermal and Fluids Engineering Conference (CD-ROM)
• 作者: Yoshitsugu Katsuki;Tatsuya Ogawa;Hiroshi Hosaka;Ken Sasaki;Kiyoshi Itao;H.Yoshida;Young-Do CHOI
• 通讯作者: Young-Do CHOI

Cavitation Control in Inducer and Centrifugal Pump by Use of J-Groove

利用 J 型槽控制诱导轮和离心泵的气蚀

• 发表时间: 2004
• 期刊: Proc.of 22^<nd> IAHR Symposium on Hydraulic Machinery and Systems Vol.2
• 作者: Y.Mitsuya;K.Goto;Y.Hayashi;M.Ohtani et al.;Junichi KUROKAWA
• 通讯作者: Junichi KUROKAWA

H.Imamura, J.Kurokawa, J.Matsui, M.Kikuchi: "Suppression of Cavitation in Inducer by use of J-groove"Proc.of Fifth International Symposium on Cavitation. 1-6 (2003)

H.Imamura、J.Kurokawa、J.Matsui、M.Kikuchi：“利用 J 形槽抑制诱导轮中的空化”第五届国际空化研讨会论文集。

Suppression of Cavitating Flow in Inducer by J-Groove

• 发表时间: 2003-11
• 作者: H. Imamura;J. Kurokawa;J. Matsui;M. Kikuchi