LI, Dacai ;LV, Changhong ;BU, Zhenhai ;YAN, Xuming ;LAN, Zili ;CAO, Lihua ;SI, Heyong . Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals. Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 70, n.7-8, p. 369-380, april 2024. ISSN 0039-2480. Available at: <https://www.sv-jme.eu/article/dynamic-and-phase-frequency-characteristics-of-rotor-instability-induced-by-steam-flow-excited-vibration-in-seal/>. Date accessed: 19 nov. 2024. doi:http://dx.doi.org/10.5545/sv-jme.2023.902.
Li, D., Lv, C., Bu, Z., Yan, X., Lan, Z., Cao, L., & Si, H. (2024). Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals. Strojniški vestnik - Journal of Mechanical Engineering, 70(7-8), 369-380. doi:http://dx.doi.org/10.5545/sv-jme.2023.902
@article{sv-jmesv-jme.2023.902,
author = {Dacai Li and Changhong Lv and Zhenhai Bu and Xuming Yan and Zili Lan and Lihua Cao and Heyong Si},
title = {Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {70},
number = {7-8},
year = {2024},
keywords = {Ultra-Supercritical unit; Labyrinth Seal; Steam Flow Excited Vibration; Dynamic Characteristics; Phase-Frequency Analysis; },
abstract = {Steam flow excited vibration in seals seriously affects the seal-rotor stability. A mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method was verified by experiments. The average effective damping and working ability of the fluid were proposed to analyse the stability of the seal. The mechanism of seal instability induced by steam flow excited vibration was revealed through the phase-frequency characteristics of exciting forces and displacements. The results show that direct damping decreases gradually with an increase in frequency, and the cross-coupling damping tends to be stable over 15 Hz. The average effective damping is more sensitive and accurate in predicting the seal stability. Effective damping decreases with increased frequency. Therefore, the rotor stability is decreased. Near the 12 Hz and 24 Hz frequencies, the average effective damping of eccentricity fluctuates, so the seal stability is poor. The negative effect of exciting forces increases, and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes, the seal stability decreases. The fundamental reason for rotor instability induced by steam flow excited vibration in seals is the sharp changes of phase difference caused by pressure fluctuations.},
issn = {0039-2480}, pages = {369-380}, doi = {10.5545/sv-jme.2023.902},
url = {https://www.sv-jme.eu/article/dynamic-and-phase-frequency-characteristics-of-rotor-instability-induced-by-steam-flow-excited-vibration-in-seal/}
}
Li, D.,Lv, C.,Bu, Z.,Yan, X.,Lan, Z.,Cao, L.,Si, H. 2024 April 70. Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 70:7-8
%A Li, Dacai %A Lv, Changhong %A Bu, Zhenhai %A Yan, Xuming %A Lan, Zili %A Cao, Lihua %A Si, Heyong %D 2024 %T Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals %B 2024 %9 Ultra-Supercritical unit; Labyrinth Seal; Steam Flow Excited Vibration; Dynamic Characteristics; Phase-Frequency Analysis; %! Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals %K Ultra-Supercritical unit; Labyrinth Seal; Steam Flow Excited Vibration; Dynamic Characteristics; Phase-Frequency Analysis; %X Steam flow excited vibration in seals seriously affects the seal-rotor stability. A mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method was verified by experiments. The average effective damping and working ability of the fluid were proposed to analyse the stability of the seal. The mechanism of seal instability induced by steam flow excited vibration was revealed through the phase-frequency characteristics of exciting forces and displacements. The results show that direct damping decreases gradually with an increase in frequency, and the cross-coupling damping tends to be stable over 15 Hz. The average effective damping is more sensitive and accurate in predicting the seal stability. Effective damping decreases with increased frequency. Therefore, the rotor stability is decreased. Near the 12 Hz and 24 Hz frequencies, the average effective damping of eccentricity fluctuates, so the seal stability is poor. The negative effect of exciting forces increases, and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes, the seal stability decreases. The fundamental reason for rotor instability induced by steam flow excited vibration in seals is the sharp changes of phase difference caused by pressure fluctuations. %U https://www.sv-jme.eu/article/dynamic-and-phase-frequency-characteristics-of-rotor-instability-induced-by-steam-flow-excited-vibration-in-seal/ %0 Journal Article %R 10.5545/sv-jme.2023.902 %& 369 %P 12 %J Strojniški vestnik - Journal of Mechanical Engineering %V 70 %N 7-8 %@ 0039-2480 %8 2024-04-22 %7 2024-04-22
Li, Dacai, Changhong Lv, Zhenhai Bu, Xuming Yan, Zili Lan, Lihua Cao, & Heyong Si. "Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals." Strojniški vestnik - Journal of Mechanical Engineering [Online], 70.7-8 (2024): 369-380. Web. 19 Nov. 2024
TY - JOUR AU - Li, Dacai AU - Lv, Changhong AU - Bu, Zhenhai AU - Yan, Xuming AU - Lan, Zili AU - Cao, Lihua AU - Si, Heyong PY - 2024 TI - Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals JF - Strojniški vestnik - Journal of Mechanical Engineering DO - 10.5545/sv-jme.2023.902 KW - Ultra-Supercritical unit; Labyrinth Seal; Steam Flow Excited Vibration; Dynamic Characteristics; Phase-Frequency Analysis; N2 - Steam flow excited vibration in seals seriously affects the seal-rotor stability. A mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method was verified by experiments. The average effective damping and working ability of the fluid were proposed to analyse the stability of the seal. The mechanism of seal instability induced by steam flow excited vibration was revealed through the phase-frequency characteristics of exciting forces and displacements. The results show that direct damping decreases gradually with an increase in frequency, and the cross-coupling damping tends to be stable over 15 Hz. The average effective damping is more sensitive and accurate in predicting the seal stability. Effective damping decreases with increased frequency. Therefore, the rotor stability is decreased. Near the 12 Hz and 24 Hz frequencies, the average effective damping of eccentricity fluctuates, so the seal stability is poor. The negative effect of exciting forces increases, and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes, the seal stability decreases. The fundamental reason for rotor instability induced by steam flow excited vibration in seals is the sharp changes of phase difference caused by pressure fluctuations. UR - https://www.sv-jme.eu/article/dynamic-and-phase-frequency-characteristics-of-rotor-instability-induced-by-steam-flow-excited-vibration-in-seal/
@article{{sv-jme}{sv-jme.2023.902},
author = {Li, D., Lv, C., Bu, Z., Yan, X., Lan, Z., Cao, L., Si, H.},
title = {Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {70},
number = {7-8},
year = {2024},
doi = {10.5545/sv-jme.2023.902},
url = {https://www.sv-jme.eu/article/dynamic-and-phase-frequency-characteristics-of-rotor-instability-induced-by-steam-flow-excited-vibration-in-seal/}
}
TY - JOUR AU - Li, Dacai AU - Lv, Changhong AU - Bu, Zhenhai AU - Yan, Xuming AU - Lan, Zili AU - Cao, Lihua AU - Si, Heyong PY - 2024/04/22 TI - Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals JF - Strojniški vestnik - Journal of Mechanical Engineering; Vol 70, No 7-8 (2024): Strojniški vestnik - Journal of Mechanical Engineering DO - 10.5545/sv-jme.2023.902 KW - Ultra-Supercritical unit, Labyrinth Seal, Steam Flow Excited Vibration, Dynamic Characteristics, Phase-Frequency Analysis, N2 - Steam flow excited vibration in seals seriously affects the seal-rotor stability. A mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method was verified by experiments. The average effective damping and working ability of the fluid were proposed to analyse the stability of the seal. The mechanism of seal instability induced by steam flow excited vibration was revealed through the phase-frequency characteristics of exciting forces and displacements. The results show that direct damping decreases gradually with an increase in frequency, and the cross-coupling damping tends to be stable over 15 Hz. The average effective damping is more sensitive and accurate in predicting the seal stability. Effective damping decreases with increased frequency. Therefore, the rotor stability is decreased. Near the 12 Hz and 24 Hz frequencies, the average effective damping of eccentricity fluctuates, so the seal stability is poor. The negative effect of exciting forces increases, and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes, the seal stability decreases. The fundamental reason for rotor instability induced by steam flow excited vibration in seals is the sharp changes of phase difference caused by pressure fluctuations. UR - https://www.sv-jme.eu/article/dynamic-and-phase-frequency-characteristics-of-rotor-instability-induced-by-steam-flow-excited-vibration-in-seal/
Li, Dacai, Lv, Changhong, Bu, Zhenhai, Yan, Xuming, Lan, Zili, Cao, Lihua, AND Si, Heyong. "Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seals" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 70 Number 7-8 (22 April 2024)
Strojniški vestnik - Journal of Mechanical Engineering 70(2024)7-8, 369-380
© The Authors 2024. CC BY 4.0 Int.
Steam flow excited vibration in seals seriously affects the seal-rotor stability. A mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method was verified by experiments. The average effective damping and working ability of the fluid were proposed to analyse the stability of the seal. The mechanism of seal instability induced by steam flow excited vibration was revealed through the phase-frequency characteristics of exciting forces and displacements. The results show that direct damping decreases gradually with an increase in frequency, and the cross-coupling damping tends to be stable over 15 Hz. The average effective damping is more sensitive and accurate in predicting the seal stability. Effective damping decreases with increased frequency. Therefore, the rotor stability is decreased. Near the 12 Hz and 24 Hz frequencies, the average effective damping of eccentricity fluctuates, so the seal stability is poor. The negative effect of exciting forces increases, and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes, the seal stability decreases. The fundamental reason for rotor instability induced by steam flow excited vibration in seals is the sharp changes of phase difference caused by pressure fluctuations.