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 Seal. Articles in Press, [S.l.], v. 0, n.0, p. , 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: 18 jul. 2024. doi:http://dx.doi.org/.
Li, D., Lv, C., Bu, Z., Yan, X., Lan, Z., Cao, L., & Si, H. (0). Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seal. Articles in Press, 0(0), . doi:http://dx.doi.org/
@article{.,
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 Seal},
journal = {Articles in Press},
volume = {0},
number = {0},
year = {0},
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. The mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method is verified by experiments. The average effective damping and working ability of the fluid were proposed to analyze 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 at frequencies greater than 15 Hz. The average effective damping is more sensitive and accurate in predicting the stability of the seal. The effective damping decreases with the increase of 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 increase and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes greatly, 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 = {}, doi = {},
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. 0 April 0. Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seal. Articles in Press. [Online] 0:0
%A Li, Dacai %A Lv, Changhong %A Bu, Zhenhai %A Yan, Xuming %A Lan, Zili %A Cao, Lihua %A Si, Heyong %D 0 %T Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seal %B 0 %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 Seal %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. The mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method is verified by experiments. The average effective damping and working ability of the fluid were proposed to analyze 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 at frequencies greater than 15 Hz. The average effective damping is more sensitive and accurate in predicting the stability of the seal. The effective damping decreases with the increase of 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 increase and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes greatly, 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 %& %P 1 %J Articles in Press %V 0 %N 0 %@ 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 Seal." Articles in Press [Online], 0.0 (0): . Web. 18 Jul. 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 - 0 TI - Dynamic and Phase-Frequency Characteristics of Rotor Instability Induced by Steam Flow Excited Vibration in Seal JF - Articles in Press DO - 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. The mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method is verified by experiments. The average effective damping and working ability of the fluid were proposed to analyze 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 at frequencies greater than 15 Hz. The average effective damping is more sensitive and accurate in predicting the stability of the seal. The effective damping decreases with the increase of 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 increase and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes greatly, 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{{}{.},
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 Seal},
journal = {Articles in Press},
volume = {0},
number = {0},
year = {0},
doi = {},
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 Seal JF - Articles in Press; Vol 0, No 0 (0): Articles in Press DO - 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. The mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method is verified by experiments. The average effective damping and working ability of the fluid were proposed to analyze 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 at frequencies greater than 15 Hz. The average effective damping is more sensitive and accurate in predicting the stability of the seal. The effective damping decreases with the increase of 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 increase and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes greatly, 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 Seal" Articles in Press [Online], Volume 0 Number 0 (22 April 2024)
Articles in Press
Steam flow excited vibration in seals seriously affects the seal-rotor stability. The mesh deformation based on user-defined functions was adopted to establish the multi-frequency whirl model, and the reliability of the simulation method is verified by experiments. The average effective damping and working ability of the fluid were proposed to analyze 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 at frequencies greater than 15 Hz. The average effective damping is more sensitive and accurate in predicting the stability of the seal. The effective damping decreases with the increase of 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 increase and the seal stability is improved when the eccentricity increases. When the phase difference between the excitation force and displacement changes greatly, 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.