### 抄録

The authors developed a method to estimate nozzle-wake exciting forces (NEF) using Fourier series development of angular momentum flux (AMF) at the blade inlet of radial turbines. The NEF is strongly affected by the nozzle profiles. Application of this method to the evaluation of the NEF and AMF resulted in fundamental standards for selection of the number of nozzle blades and the profiles. The values of each order of NEF are obtained from Fourier series development of AMF. There is an increasing region of NEF to the distance from a nozzle trailing edge. The maximum estimation error of the blade vibration stress, which is calculated using the values of the first order of NEF and the coefficients of effective exciting force, is 10%. The coefficient of effective exciting force is 1/3 in the first and second modes, and 1/2 in third mode. Those coefficients are evaluated as the ratio of NEF and equivalent exiting forces calculated using the measured data of vibration stresses at two different points on the blade.

元の言語 | 英語 |
---|---|

ページ（範囲） | 3635-3641 |

ページ数 | 7 |

ジャーナル | Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |

巻 | 62 |

発行部数 | 602 |

DOI | |

出版物ステータス | 出版済み - 1 1 1996 |

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### All Science Journal Classification (ASJC) codes

- Condensed Matter Physics
- Mechanical Engineering

### これを引用

*Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*,

*62*(602), 3635-3641. https://doi.org/10.1299/kikaib.62.3635

**Excitation force and blade inlet flow characteristics of radial turbines subject to nozzle wake effect.** / Matsuo, Eito; Yoshiki, Haruo; Nakazawa, Norio; Inoue, Masahiro; Furukawa, Masato; Utsumi, Ryoji.

研究成果: ジャーナルへの寄稿 › 記事

*Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*, 巻. 62, 番号 602, pp. 3635-3641. https://doi.org/10.1299/kikaib.62.3635

}

TY - JOUR

T1 - Excitation force and blade inlet flow characteristics of radial turbines subject to nozzle wake effect

AU - Matsuo, Eito

AU - Yoshiki, Haruo

AU - Nakazawa, Norio

AU - Inoue, Masahiro

AU - Furukawa, Masato

AU - Utsumi, Ryoji

PY - 1996/1/1

Y1 - 1996/1/1

N2 - The authors developed a method to estimate nozzle-wake exciting forces (NEF) using Fourier series development of angular momentum flux (AMF) at the blade inlet of radial turbines. The NEF is strongly affected by the nozzle profiles. Application of this method to the evaluation of the NEF and AMF resulted in fundamental standards for selection of the number of nozzle blades and the profiles. The values of each order of NEF are obtained from Fourier series development of AMF. There is an increasing region of NEF to the distance from a nozzle trailing edge. The maximum estimation error of the blade vibration stress, which is calculated using the values of the first order of NEF and the coefficients of effective exciting force, is 10%. The coefficient of effective exciting force is 1/3 in the first and second modes, and 1/2 in third mode. Those coefficients are evaluated as the ratio of NEF and equivalent exiting forces calculated using the measured data of vibration stresses at two different points on the blade.

AB - The authors developed a method to estimate nozzle-wake exciting forces (NEF) using Fourier series development of angular momentum flux (AMF) at the blade inlet of radial turbines. The NEF is strongly affected by the nozzle profiles. Application of this method to the evaluation of the NEF and AMF resulted in fundamental standards for selection of the number of nozzle blades and the profiles. The values of each order of NEF are obtained from Fourier series development of AMF. There is an increasing region of NEF to the distance from a nozzle trailing edge. The maximum estimation error of the blade vibration stress, which is calculated using the values of the first order of NEF and the coefficients of effective exciting force, is 10%. The coefficient of effective exciting force is 1/3 in the first and second modes, and 1/2 in third mode. Those coefficients are evaluated as the ratio of NEF and equivalent exiting forces calculated using the measured data of vibration stresses at two different points on the blade.

UR - http://www.scopus.com/inward/record.url?scp=0030261806&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030261806&partnerID=8YFLogxK

U2 - 10.1299/kikaib.62.3635

DO - 10.1299/kikaib.62.3635

M3 - Article

AN - SCOPUS:0030261806

VL - 62

SP - 3635

EP - 3641

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 602

ER -